Refactor: improve code modularity

.gitignore

@@ -27,3 +27,5 @@ tmp/
 bin/
 
 .cgcignore
+
+POSIX/

Backend/cmd/posix/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+
+	"moku-backend/internal/config"
+	"moku-backend/internal/database"
+	"moku-backend/internal/posixproj"
+)
+
+func main() {
+	command := "rebuild"
+	if len(os.Args) > 1 {
+		command = os.Args[1]
+	}
+
+	switch command {
+	case "rebuild":
+		if err := rebuildProjection(context.Background()); err != nil {
+			log.Fatalf("rebuild POSIX projection: %v", err)
+		}
+	default:
+		log.Fatalf("unsupported posix command %q (supported: rebuild)", command)
+	}
+}
+
+func rebuildProjection(ctx context.Context) error {
+	cfg := config.Load()
+
+	db, err := database.NewPostgres(cfg.PostgresURL)
+	if err != nil {
+		return fmt.Errorf("connect database: %w", err)
+	}
+	defer db.Close()
+
+	summary, err := posixproj.NewProjector(db, cfg.POSIXRoot).RebuildWithSummary(ctx)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf(
+		"POSIX projection rebuilt from %s\n  total nodes: %d\n  directories: %d\n  files: %d\n",
+		cfg.POSIXRoot,
+		summary.TotalNodes,
+		summary.DirectoryCount,
+		summary.FileCount,
+	)
+	return nil
+}

Backend/cmd/worker/main.go

@@ -1,10 +1,16 @@
 package main
 
 import (
+	"context"
+	"encoding/json"
 	"log"
+	"os/signal"
+	"syscall"
+	"time"
 
 	"moku-backend/internal/bootstrap"
-	"moku-backend/internal/process"
+	"moku-backend/internal/jobs"
+	"moku-backend/internal/worker"
 )
 
 func main() {
@@ -18,9 +24,25 @@ func main() {
 		}
 	}()
 
-	app.Logger.Info("worker ready", "service", app.ServiceName, "environment", app.Config.Environment)
+	jobStore := jobs.NewStore(app.Database)
+	runner := worker.NewRunner(jobStore, app.Logger, time.Second)
+	runner.Register(jobs.KindBootstrapStructureMaterialize, func(ctx context.Context, job jobs.Job) error {
+		var payload jobs.BootstrapStructureMaterializePayload
+		if len(job.Payload) > 0 {
+			if err := json.Unmarshal(job.Payload, &payload); err != nil {
+				return err
+			}
+		}
 
-	if err := process.WaitForShutdown(app.ServiceName, app.Logger); err != nil {
+		return bootstrap.NewService(app.Database, app.Config.POSIXRoot).ProcessBootstrapStructureMaterialization(ctx, payload.InstallationID)
+	})
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	app.Logger.Info("worker ready", "service", app.ServiceName, "environment", app.Config.Environment, "pollInterval", time.Second)
+
+	if err := runner.Run(ctx); err != nil {
 		app.Logger.Error("worker stopped", "error", err)
 		log.Fatal(err)
 	}

Backend/db/migrations/000004_posix_nodes.sql

@@ -0,0 +1,45 @@
+-- +goose Up
+
+CREATE TYPE posix_node_kind AS ENUM ('directory', 'file');
+
+CREATE TABLE IF NOT EXISTS posix_nodes (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  path TEXT NOT NULL UNIQUE,
+  parent_path TEXT,
+  name TEXT NOT NULL,
+  depth INTEGER NOT NULL,
+  node_kind posix_node_kind NOT NULL,
+  logical_type TEXT NOT NULL DEFAULT 'generic',
+  file_role TEXT,
+  resource_id TEXT,
+  resource_name TEXT,
+  resource_slug TEXT,
+  installation_id TEXT,
+  organization_id TEXT,
+  organization_slug TEXT,
+  department_slug TEXT,
+  team_slug TEXT,
+  project_slug TEXT,
+  personal_slug TEXT,
+  content_json JSONB,
+  size_bytes BIGINT NOT NULL DEFAULT 0,
+  checksum TEXT,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_posix_nodes_parent_path ON posix_nodes (parent_path);
+CREATE INDEX IF NOT EXISTS idx_posix_nodes_logical_type ON posix_nodes (logical_type);
+CREATE INDEX IF NOT EXISTS idx_posix_nodes_project_slug ON posix_nodes (project_slug);
+CREATE INDEX IF NOT EXISTS idx_posix_nodes_department_slug ON posix_nodes (department_slug);
+CREATE INDEX IF NOT EXISTS idx_posix_nodes_team_slug ON posix_nodes (team_slug);
+
+-- +goose Down
+
+DROP INDEX IF EXISTS idx_posix_nodes_team_slug;
+DROP INDEX IF EXISTS idx_posix_nodes_department_slug;
+DROP INDEX IF EXISTS idx_posix_nodes_project_slug;
+DROP INDEX IF EXISTS idx_posix_nodes_logical_type;
+DROP INDEX IF EXISTS idx_posix_nodes_parent_path;
+DROP TABLE IF EXISTS posix_nodes;
+DROP TYPE IF EXISTS posix_node_kind;

Backend/db/migrations/000005_background_jobs.sql

@@ -0,0 +1,64 @@
+-- +goose Up
+
+CREATE TYPE bootstrap_materialization_status AS ENUM ('not_started', 'pending', 'running', 'succeeded', 'failed');
+CREATE TYPE background_job_status AS ENUM ('pending', 'running', 'succeeded', 'failed');
+
+ALTER TABLE installations
+  ADD COLUMN IF NOT EXISTS materialization_status bootstrap_materialization_status NOT NULL DEFAULT 'not_started',
+  ADD COLUMN IF NOT EXISTS materialization_error TEXT,
+  ADD COLUMN IF NOT EXISTS materialization_requested_at TIMESTAMPTZ,
+  ADD COLUMN IF NOT EXISTS materialization_started_at TIMESTAMPTZ,
+  ADD COLUMN IF NOT EXISTS materialization_finished_at TIMESTAMPTZ;
+
+UPDATE installations
+SET
+  materialization_status = CASE
+    WHEN is_bootstrapped THEN 'succeeded'::bootstrap_materialization_status
+    ELSE 'not_started'::bootstrap_materialization_status
+  END,
+  materialization_error = NULL,
+  materialization_requested_at = CASE
+    WHEN is_bootstrapped THEN COALESCE(bootstrapped_at, created_at, NOW())
+    ELSE NULL
+  END,
+  materialization_started_at = CASE
+    WHEN is_bootstrapped THEN COALESCE(bootstrapped_at, created_at, NOW())
+    ELSE NULL
+  END,
+  materialization_finished_at = CASE
+    WHEN is_bootstrapped THEN COALESCE(bootstrapped_at, created_at, NOW())
+    ELSE NULL
+  END
+WHERE materialization_status = 'not_started'::bootstrap_materialization_status;
+
+CREATE TABLE IF NOT EXISTS background_jobs (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  kind TEXT NOT NULL,
+  status background_job_status NOT NULL DEFAULT 'pending',
+  payload JSONB NOT NULL DEFAULT '{}'::jsonb,
+  attempts INTEGER NOT NULL DEFAULT 0,
+  max_attempts INTEGER NOT NULL DEFAULT 1,
+  available_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  started_at TIMESTAMPTZ,
+  finished_at TIMESTAMPTZ,
+  last_error TEXT,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_background_jobs_claim ON background_jobs (status, available_at, created_at);
+
+-- +goose Down
+
+DROP INDEX IF EXISTS idx_background_jobs_claim;
+DROP TABLE IF EXISTS background_jobs;
+
+ALTER TABLE installations
+  DROP COLUMN IF EXISTS materialization_finished_at,
+  DROP COLUMN IF EXISTS materialization_started_at,
+  DROP COLUMN IF EXISTS materialization_requested_at,
+  DROP COLUMN IF EXISTS materialization_error,
+  DROP COLUMN IF EXISTS materialization_status;
+
+DROP TYPE IF EXISTS background_job_status;
+DROP TYPE IF EXISTS bootstrap_materialization_status;

Backend/internal/bootstrap/bootstrap_installation.go

@@ -0,0 +1,159 @@
+package bootstrap
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/jackc/pgx/v5"
+)
+
+const (
+	materializationNotStarted = "not_started"
+	materializationPending    = "pending"
+	materializationRunning    = "running"
+	materializationSucceeded  = "succeeded"
+	materializationFailed     = "failed"
+)
+
+type bootstrapStructurePrerequisites struct {
+	installation InstallationRecord
+	admin        AdminSummary
+}
+
+func (service *Service) GetInstallation(ctx context.Context) (*InstallationRecord, error) {
+	record, err := scanInstallationRecord(service.db.Pool.QueryRow(ctx, `
+		SELECT
+			id::text,
+			name,
+			mode::text,
+			access::text,
+			protocol::text,
+			host,
+			is_bootstrapped,
+			materialization_status::text,
+			materialization_error
+		FROM installations
+		WHERE singleton = TRUE
+		LIMIT 1;
+	`))
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &record, nil
+}
+
+func loadInstallation(ctx context.Context, tx pgx.Tx) (InstallationRecord, error) {
+	return scanInstallationRecord(tx.QueryRow(ctx, `
+		SELECT
+			id::text,
+			name,
+			mode::text,
+			access::text,
+			protocol::text,
+			host,
+			is_bootstrapped,
+			materialization_status::text,
+			materialization_error
+		FROM installations
+		WHERE singleton = TRUE
+		LIMIT 1;
+	`))
+}
+
+func updateBootstrappedInstallation(ctx context.Context, tx pgx.Tx) (InstallationRecord, error) {
+	return scanInstallationRecord(tx.QueryRow(ctx, `
+		UPDATE installations
+		SET
+			is_bootstrapped = TRUE,
+			bootstrapped_at = COALESCE(bootstrapped_at, NOW()),
+			materialization_status = 'pending'::bootstrap_materialization_status,
+			materialization_error = NULL,
+			materialization_requested_at = NOW(),
+			materialization_started_at = NULL,
+			materialization_finished_at = NULL,
+			updated_at = NOW()
+		WHERE singleton = TRUE
+		RETURNING
+			id::text,
+			name,
+			mode::text,
+			access::text,
+			protocol::text,
+			host,
+			is_bootstrapped,
+			materialization_status::text,
+			materialization_error;
+	`))
+}
+
+func scanInstallationRecord(row pgx.Row) (InstallationRecord, error) {
+	var record InstallationRecord
+	if err := row.Scan(
+		&record.ID,
+		&record.Name,
+		&record.Mode,
+		&record.Access,
+		&record.Protocol,
+		&record.Host,
+		&record.IsBootstrapped,
+		&record.MaterializationStatus,
+		&record.MaterializationError,
+	); err != nil {
+		return InstallationRecord{}, err
+	}
+
+	if strings.TrimSpace(record.MaterializationStatus) == "" {
+		record.MaterializationStatus = materializationNotStarted
+	}
+
+	return record, nil
+}
+
+func loadPrimaryAdmin(ctx context.Context, tx pgx.Tx) (AdminSummary, error) {
+	var admin AdminSummary
+	if err := tx.QueryRow(ctx, `
+		SELECT id::text, email, display_name
+		FROM users
+		WHERE is_instance_admin = TRUE
+		ORDER BY created_at ASC
+		LIMIT 1;
+	`).Scan(&admin.ID, &admin.Email, &admin.DisplayName); err != nil {
+		return AdminSummary{}, err
+	}
+
+	return admin, nil
+}
+
+func (service *Service) loadBootstrapStructurePrerequisites(
+	ctx context.Context,
+	tx pgx.Tx,
+) (bootstrapStructurePrerequisites, error) {
+	installation, err := loadInstallation(ctx, tx)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return bootstrapStructurePrerequisites{}, ErrInstallationNotConfigured
+		}
+
+		return bootstrapStructurePrerequisites{}, err
+	}
+
+	admin, err := loadPrimaryAdmin(ctx, tx)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return bootstrapStructurePrerequisites{}, ErrAdminNotConfigured
+		}
+
+		return bootstrapStructurePrerequisites{}, err
+	}
+
+	return bootstrapStructurePrerequisites{
+		installation: installation,
+		admin:        admin,
+	}, nil
+}

Backend/internal/bootstrap/bootstrap_materialization.go

@@ -0,0 +1,180 @@
+package bootstrap
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"moku-backend/internal/jobs"
+	"moku-backend/internal/posixproj"
+)
+
+func (service *Service) enqueueBootstrapStructureMaterialization(
+	ctx context.Context,
+	installation *InstallationRecord,
+) error {
+	if installation == nil {
+		return nil
+	}
+
+	jobStore := jobs.NewStore(service.db)
+	if _, err := jobStore.Enqueue(ctx, jobs.EnqueueInput{
+		Kind: jobs.KindBootstrapStructureMaterialize,
+		Payload: jobs.BootstrapStructureMaterializePayload{
+			InstallationID: installation.ID,
+		},
+	}); err != nil {
+		failure := fmt.Sprintf("enqueue bootstrap materialization job: %v", err)
+		if markErr := service.markBootstrapMaterializationFailed(ctx, installation.ID, failure); markErr != nil {
+			return errors.Join(err, markErr)
+		}
+
+		// The relational bootstrap write already committed successfully, so keep the
+		// response successful and surface the enqueue problem via materialization state.
+		installation.MaterializationStatus = materializationFailed
+		installation.MaterializationError = &failure
+	}
+
+	return nil
+}
+
+func (service *Service) ProcessBootstrapStructureMaterialization(ctx context.Context, installationID string) error {
+	trimmedInstallationID := strings.TrimSpace(installationID)
+	if trimmedInstallationID == "" {
+		return ErrInstallationNotConfigured
+	}
+
+	installation, err := service.GetInstallation(ctx)
+	if err != nil {
+		return err
+	}
+	if installation == nil || installation.ID != trimmedInstallationID {
+		return ErrInstallationNotConfigured
+	}
+
+	if err := service.markBootstrapMaterializationRunning(ctx, trimmedInstallationID); err != nil {
+		return err
+	}
+
+	if err := service.materializeBootstrapStructure(ctx, *installation); err != nil {
+		failure := strings.TrimSpace(err.Error())
+		if failure == "" {
+			failure = "bootstrap materialization failed"
+		}
+
+		if markErr := service.markBootstrapMaterializationFailed(ctx, trimmedInstallationID, failure); markErr != nil {
+			return errors.Join(err, markErr)
+		}
+
+		return err
+	}
+
+	return service.markBootstrapMaterializationSucceeded(ctx, trimmedInstallationID)
+}
+
+func (service *Service) materializeBootstrapStructure(ctx context.Context, installation InstallationRecord) error {
+	admin, err := service.GetAdmin(ctx)
+	if err != nil {
+		return err
+	}
+	if admin == nil {
+		return ErrAdminNotConfigured
+	}
+
+	organization, err := service.loadPrimaryOrganization(ctx)
+	if err != nil {
+		return err
+	}
+	if organization == nil {
+		return ErrBootstrapStructureMissing
+	}
+
+	department, err := service.loadPrimaryDepartment(ctx)
+	if err != nil {
+		return err
+	}
+	if department == nil {
+		return ErrBootstrapStructureMissing
+	}
+
+	team, err := service.loadPrimaryTeam(ctx)
+	if err != nil {
+		return err
+	}
+	if team == nil {
+		return ErrBootstrapStructureMissing
+	}
+
+	project, err := service.loadPrimaryProject(ctx)
+	if err != nil {
+		return err
+	}
+	if project == nil {
+		return ErrBootstrapStructureMissing
+	}
+
+	if err := service.ensureBootstrapPOSIXSkeleton(
+		installation,
+		AdminSummary{ID: admin.ID, Email: admin.Email, DisplayName: admin.DisplayName},
+		namedRecord{ID: organization.ID, Name: organization.Name, Slug: organization.Slug},
+		namedRecord{ID: department.ID, Name: department.Name, Slug: department.Slug},
+		namedRecord{ID: team.ID, Name: team.Name, Slug: team.Slug},
+		namedRecord{ID: project.ID, Name: project.Name, Slug: project.Slug},
+	); err != nil {
+		return err
+	}
+
+	return service.rebuildProjection(ctx)
+}
+
+func (service *Service) rebuildProjection(ctx context.Context) error {
+	if err := posixproj.NewProjector(service.db, service.posixRoot).Rebuild(ctx); err != nil {
+		return fmt.Errorf("rebuild POSIX projection: %w", err)
+	}
+
+	return nil
+}
+
+func (service *Service) markBootstrapMaterializationRunning(ctx context.Context, installationID string) error {
+	_, err := service.db.Pool.Exec(ctx, `
+		UPDATE installations
+		SET
+			materialization_status = 'running'::bootstrap_materialization_status,
+			materialization_error = NULL,
+			materialization_started_at = NOW(),
+			materialization_finished_at = NULL,
+			updated_at = NOW()
+		WHERE id = $1::uuid;
+	`, strings.TrimSpace(installationID))
+
+	return err
+}
+
+func (service *Service) markBootstrapMaterializationSucceeded(ctx context.Context, installationID string) error {
+	_, err := service.db.Pool.Exec(ctx, `
+		UPDATE installations
+		SET
+			materialization_status = 'succeeded'::bootstrap_materialization_status,
+			materialization_error = NULL,
+			materialization_finished_at = NOW(),
+			updated_at = NOW()
+		WHERE id = $1::uuid;
+	`, strings.TrimSpace(installationID))
+
+	return err
+}
+
+func (service *Service) markBootstrapMaterializationFailed(ctx context.Context, installationID, failure string) error {
+	_, err := service.db.Pool.Exec(ctx, `
+		UPDATE installations
+		SET
+			materialization_status = 'failed'::bootstrap_materialization_status,
+			materialization_error = $2,
+			materialization_finished_at = NOW(),
+			updated_at = NOW()
+		WHERE id = $1::uuid;
+	`, strings.TrimSpace(installationID), strings.TrimSpace(failure))
+
+	return err
+}

Backend/internal/bootstrap/bootstrap_state.go

@@ -0,0 +1,73 @@
+package bootstrap
+
+import "context"
+
+func (service *Service) GetState(ctx context.Context) (BootstrapState, error) {
+	installation, err := service.GetInstallation(ctx)
+	if err != nil {
+		return BootstrapState{}, err
+	}
+
+	admin, err := service.GetAdmin(ctx)
+	if err != nil {
+		return BootstrapState{}, err
+	}
+
+	structure, err := service.GetStructure(ctx)
+	if err != nil {
+		return BootstrapState{}, err
+	}
+
+	return BootstrapState{
+		Installation: installation,
+		Admin:        admin,
+		Structure:    structure,
+	}, nil
+}
+
+func (service *Service) GetAppShellState(ctx context.Context) (AppShellState, error) {
+	installation, err := service.GetInstallation(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	admin, err := service.GetAdmin(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	organizations, err := service.listOrganizations(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	departments, err := service.listDepartments(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	teams, err := service.listTeams(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	projects, err := service.listProjects(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	workspaces, err := service.listWorkspaces(ctx)
+	if err != nil {
+		return AppShellState{}, err
+	}
+
+	return AppShellState{
+		Installation:  installation,
+		Admin:         admin,
+		Organizations: organizations,
+		Departments:   departments,
+		Teams:         teams,
+		Projects:      projects,
+		Workspaces:    workspaces,
+	}, nil
+}

Backend/internal/bootstrap/service_test.go

@@ -0,0 +1,639 @@
+package bootstrap
+
+import (
+	"encoding/json"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+type fakeRow struct {
+	scan func(dest ...any) error
+}
+
+func (row fakeRow) Scan(dest ...any) error {
+	return row.scan(dest...)
+}
+
+func TestScanInstallationRecordDefaultsMaterializationStatus(t *testing.T) {
+	record, err := scanInstallationRecord(fakeRow{scan: func(dest ...any) error {
+		*(dest[0].(*string)) = "installation-1"
+		*(dest[1].(*string)) = "MangoPig"
+		*(dest[2].(*string)) = "personal"
+		*(dest[3].(*string)) = "local"
+		*(dest[4].(*string)) = "http"
+		*(dest[5].(*string)) = "localhost"
+		*(dest[6].(*bool)) = true
+		*(dest[7].(*string)) = ""
+		*(dest[8].(**string)) = nil
+		return nil
+	}})
+	if err != nil {
+		t.Fatalf("scanInstallationRecord: %v", err)
+	}
+
+	if record.MaterializationStatus != materializationNotStarted {
+		t.Fatalf("expected default materialization status %q, got %q", materializationNotStarted, record.MaterializationStatus)
+	}
+	if record.MaterializationError != nil {
+		t.Fatalf("expected nil materialization error, got %#v", record.MaterializationError)
+	}
+}
+
+func TestScanInstallationRecordPreservesMaterializationFields(t *testing.T) {
+	failure := "projection rebuild failed"
+
+	record, err := scanInstallationRecord(fakeRow{scan: func(dest ...any) error {
+		*(dest[0].(*string)) = "installation-2"
+		*(dest[1].(*string)) = "MangoPig"
+		*(dest[2].(*string)) = "personal"
+		*(dest[3].(*string)) = "local"
+		*(dest[4].(*string)) = "http"
+		*(dest[5].(*string)) = "localhost"
+		*(dest[6].(*bool)) = true
+		*(dest[7].(*string)) = materializationFailed
+		*(dest[8].(**string)) = &failure
+		return nil
+	}})
+	if err != nil {
+		t.Fatalf("scanInstallationRecord: %v", err)
+	}
+
+	if record.MaterializationStatus != materializationFailed {
+		t.Fatalf("expected materialization status %q, got %q", materializationFailed, record.MaterializationStatus)
+	}
+	if record.MaterializationError == nil || *record.MaterializationError != failure {
+		t.Fatalf("expected materialization error %q, got %#v", failure, record.MaterializationError)
+	}
+}
+
+func TestEnsureBootstrapPOSIXSkeletonInitializesEmptyRoot(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	t.Setenv("POSIX_ROOT", rootPath)
+
+	if _, err := os.Stat(rootPath); !os.IsNotExist(err) {
+		t.Fatalf("expected isolated POSIX root to start absent, got err=%v", err)
+	}
+
+	service := NewService(nil, os.Getenv("POSIX_ROOT"))
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{
+			ID:             "installation-1",
+			Name:           "MangoPig",
+			Mode:           "personal",
+			Access:         "local",
+			Protocol:       "http",
+			Host:           "localhost",
+			IsBootstrapped: true,
+		},
+		AdminSummary{
+			ID:          "admin-1",
+			Email:       "ronald@example.com",
+			DisplayName: "Ronald",
+		},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	requiredPaths := []string{
+		filepath.Join(rootPath, "settings.json"),
+		filepath.Join(rootPath, "layout.json"),
+		filepath.Join(rootPath, "catalog", "packs"),
+		filepath.Join(rootPath, "catalog", "standalone"),
+		filepath.Join(rootPath, "departments", "department-primary-department", "settings.json"),
+		filepath.Join(rootPath, "departments", "department-primary-department", "users.json"),
+		filepath.Join(rootPath, "departments", "department-primary-department", "teams", "team-primary-team", "settings.json"),
+		filepath.Join(rootPath, "departments", "department-primary-department", "teams", "team-primary-team", "users.json"),
+		filepath.Join(rootPath, "projects", "project-primary-project", "settings.json"),
+		filepath.Join(rootPath, "projects", "project-primary-project", "home.json"),
+		filepath.Join(rootPath, "projects", "project-primary-project", "acl.json"),
+		filepath.Join(rootPath, "projects", "project-primary-project", "children"),
+		filepath.Join(rootPath, "projects", "project-primary-project", "tree"),
+		filepath.Join(rootPath, "users", "settings.json"),
+		filepath.Join(rootPath, "users", "data.json"),
+		filepath.Join(rootPath, "users", "personals"),
+		filepath.Join(rootPath, "users", "personals", "personal-ronald", "settings.json"),
+		filepath.Join(rootPath, "users", "personals", "personal-ronald", "layout.json"),
+		filepath.Join(rootPath, "users", "personals", "personal-ronald", "home.json"),
+		filepath.Join(rootPath, "users", "personals", "personal-ronald", "tree"),
+	}
+
+	for _, path := range requiredPaths {
+		if _, err := os.Stat(path); err != nil {
+			t.Fatalf("expected path to exist %s: %v", path, err)
+		}
+	}
+
+	settingsPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "settings.json"))
+	installationPayload, ok := settingsPayload["installation"].(map[string]any)
+	if !ok {
+		t.Fatalf("settings.json missing installation object: %#v", settingsPayload)
+	}
+	if installationPayload["name"] != "MangoPig" {
+		t.Fatalf("expected installation name MangoPig, got %#v", installationPayload["name"])
+	}
+	if installationPayload["isBootstrapped"] != true {
+		t.Fatalf("expected installation to be bootstrapped, got %#v", installationPayload["isBootstrapped"])
+	}
+
+	layoutPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "layout.json"))
+	homePayload, ok := layoutPayload["home"].(map[string]any)
+	if !ok {
+		t.Fatalf("layout.json missing home object: %#v", layoutPayload)
+	}
+	if homePayload["defaultProjectSlug"] != "primary-project" {
+		t.Fatalf("expected default project slug primary-project, got %#v", homePayload["defaultProjectSlug"])
+	}
+
+	projectSettings := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "projects", "project-primary-project", "settings.json"))
+	if projectSettings["type"] != "project" {
+		t.Fatalf("expected project settings type project, got %#v", projectSettings["type"])
+	}
+
+	projectACL := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "projects", "project-primary-project", "acl.json"))
+	if projectACL["inherits"] != true {
+		t.Fatalf("expected project acl to inherit by default, got %#v", projectACL["inherits"])
+	}
+
+	usersSettings := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "users", "settings.json"))
+	if usersSettings["primaryAdminId"] != "admin-1" {
+		t.Fatalf("expected primary admin id admin-1, got %#v", usersSettings["primaryAdminId"])
+	}
+
+	personalSettings := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "users", "personals", "personal-ronald", "settings.json"))
+	if personalSettings["type"] != "personal" {
+		t.Fatalf("expected personal settings type personal, got %#v", personalSettings["type"])
+	}
+	if personalSettings["name"] != "Ronald" {
+		t.Fatalf("expected personal name Ronald, got %#v", personalSettings["name"])
+	}
+	if personalSettings["slug"] != "ronald" {
+		t.Fatalf("expected personal slug ronald, got %#v", personalSettings["slug"])
+	}
+
+	personalHome := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "users", "personals", "personal-ronald", "home.json"))
+	if personalHome["type"] != "personal-home" {
+		t.Fatalf("expected personal home type personal-home, got %#v", personalHome["type"])
+	}
+	if personalHome["title"] != "Ronald's Home" {
+		t.Fatalf("expected personal home title Ronald's Home, got %#v", personalHome["title"])
+	}
+}
+
+func TestCreateProjectHierarchyFolderOnDiskCreatesExpectedFolderShape(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	createdPath, createdSlug, err := service.createProjectHierarchyFolderOnDisk("primary-project", "", "Design System")
+	if err != nil {
+		t.Fatalf("createProjectHierarchyFolderOnDisk root folder: %v", err)
+	}
+	if createdPath != "projects/project-primary-project/children/folder-design-system" {
+		t.Fatalf("unexpected created path: %s", createdPath)
+	}
+	if createdSlug != "design-system" {
+		t.Fatalf("unexpected created slug: %s", createdSlug)
+	}
+
+	createdFolderPath := filepath.Join(rootPath, "projects", "project-primary-project", "children", "folder-design-system")
+	for _, path := range []string{
+		filepath.Join(createdFolderPath, "folder.json"),
+		filepath.Join(createdFolderPath, "acl.json"),
+		filepath.Join(createdFolderPath, "children"),
+	} {
+		if _, err := os.Stat(path); err != nil {
+			t.Fatalf("expected path to exist %s: %v", path, err)
+		}
+	}
+
+	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(createdFolderPath, "folder.json"))
+	if strings.TrimSpace(asStringForTest(folderPayload["id"])) == "" {
+		t.Fatalf("expected created folder to have stable id, got %#v", folderPayload["id"])
+	}
+	if folderPayload["name"] != "Design System" {
+		t.Fatalf("expected folder name Design System, got %#v", folderPayload["name"])
+	}
+	if folderPayload["slug"] != "design-system" {
+		t.Fatalf("expected folder slug design-system, got %#v", folderPayload["slug"])
+	}
+
+	nestedPath, nestedSlug, err := service.createProjectHierarchyFolderOnDisk("primary-project", createdPath, "Research")
+	if err != nil {
+		t.Fatalf("createProjectHierarchyFolderOnDisk nested folder: %v", err)
+	}
+	if nestedPath != "projects/project-primary-project/children/folder-design-system/children/folder-research" {
+		t.Fatalf("unexpected nested path: %s", nestedPath)
+	}
+	if nestedSlug != "research" {
+		t.Fatalf("unexpected nested slug: %s", nestedSlug)
+	}
+}
+
+func TestCreateProjectTreeFolderOnDiskCreatesExpectedFolderShape(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	createdPath, createdSlug, err := service.createProjectTreeFolderOnDisk("primary-project", "", "Docs")
+	if err != nil {
+		t.Fatalf("createProjectTreeFolderOnDisk root folder: %v", err)
+	}
+	if createdPath != "projects/project-primary-project/tree/folder-docs" {
+		t.Fatalf("unexpected created path: %s", createdPath)
+	}
+	if createdSlug != "docs" {
+		t.Fatalf("unexpected created slug: %s", createdSlug)
+	}
+
+	createdFolderPath := filepath.Join(rootPath, "projects", "project-primary-project", "tree", "folder-docs")
+	for _, path := range []string{
+		filepath.Join(createdFolderPath, "folder.json"),
+		filepath.Join(createdFolderPath, "acl.json"),
+		filepath.Join(createdFolderPath, "children"),
+	} {
+		if _, err := os.Stat(path); err != nil {
+			t.Fatalf("expected path to exist %s: %v", path, err)
+		}
+	}
+
+	nestedPath, nestedSlug, err := service.createProjectTreeFolderOnDisk("primary-project", createdPath, "Research")
+	if err != nil {
+		t.Fatalf("createProjectTreeFolderOnDisk nested folder: %v", err)
+	}
+	if nestedPath != "projects/project-primary-project/tree/folder-docs/children/folder-research" {
+		t.Fatalf("unexpected nested path: %s", nestedPath)
+	}
+	if nestedSlug != "research" {
+		t.Fatalf("unexpected nested slug: %s", nestedSlug)
+	}
+}
+
+func TestRenameProjectHierarchyFolderOnDiskRenamesFolderShape(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	createdPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", "", "Design System")
+	if err != nil {
+		t.Fatalf("createProjectHierarchyFolderOnDisk root folder: %v", err)
+	}
+
+	nestedPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", createdPath, "Research")
+	if err != nil {
+		t.Fatalf("createProjectHierarchyFolderOnDisk nested folder: %v", err)
+	}
+
+	previousPath, renamedPath, err := service.renameProjectHierarchyFolderOnDisk("primary-project", createdPath, "Platform Design")
+	if err != nil {
+		t.Fatalf("renameProjectHierarchyFolderOnDisk: %v", err)
+	}
+	if previousPath != createdPath {
+		t.Fatalf("expected previous path %s, got %s", createdPath, previousPath)
+	}
+	if renamedPath != "projects/project-primary-project/children/folder-platform-design" {
+		t.Fatalf("unexpected renamed path: %s", renamedPath)
+	}
+
+	if _, err := os.Stat(filepath.Join(rootPath, filepath.FromSlash(createdPath))); !os.IsNotExist(err) {
+		t.Fatalf("expected previous folder path to be gone, got err=%v", err)
+	}
+
+	renamedFolderPath := filepath.Join(rootPath, filepath.FromSlash(renamedPath))
+	if _, err := os.Stat(filepath.Join(renamedFolderPath, "children", filepath.Base(nestedPath))); err != nil {
+		t.Fatalf("expected nested child folder to move with renamed parent: %v", err)
+	}
+
+	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(renamedFolderPath, "folder.json"))
+	if strings.TrimSpace(asStringForTest(folderPayload["id"])) == "" {
+		t.Fatalf("expected renamed folder to preserve stable id, got %#v", folderPayload["id"])
+	}
+	if folderPayload["name"] != "Platform Design" {
+		t.Fatalf("expected renamed folder name Platform Design, got %#v", folderPayload["name"])
+	}
+	if folderPayload["slug"] != "platform-design" {
+		t.Fatalf("expected renamed folder slug platform-design, got %#v", folderPayload["slug"])
+	}
+	if folderPayload["type"] != "folder" {
+		t.Fatalf("expected renamed folder type folder, got %#v", folderPayload["type"])
+	}
+}
+
+func TestRenameProjectTreeFolderOnDiskRenamesFolderShape(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	createdPath, _, err := service.createProjectTreeFolderOnDisk("primary-project", "", "Docs")
+	if err != nil {
+		t.Fatalf("createProjectTreeFolderOnDisk root folder: %v", err)
+	}
+
+	previousPath, renamedPath, err := service.renameProjectTreeFolderOnDisk("primary-project", createdPath, "Specifications")
+	if err != nil {
+		t.Fatalf("renameProjectTreeFolderOnDisk: %v", err)
+	}
+	if previousPath != createdPath {
+		t.Fatalf("expected previous path %s, got %s", createdPath, previousPath)
+	}
+	if renamedPath != "projects/project-primary-project/tree/folder-specifications" {
+		t.Fatalf("unexpected renamed path: %s", renamedPath)
+	}
+
+	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, filepath.FromSlash(renamedPath), "folder.json"))
+	if folderPayload["name"] != "Specifications" {
+		t.Fatalf("expected renamed folder name Specifications, got %#v", folderPayload["name"])
+	}
+	if folderPayload["slug"] != "specifications" {
+		t.Fatalf("expected renamed folder slug specifications, got %#v", folderPayload["slug"])
+	}
+}
+
+func TestMoveProjectHierarchyFolderOnDiskMovesFolderToNewParent(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	designPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", "", "Design")
+	if err != nil {
+		t.Fatalf("create design folder: %v", err)
+	}
+	operationsPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", "", "Operations")
+	if err != nil {
+		t.Fatalf("create operations folder: %v", err)
+	}
+	researchPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", designPath, "Research")
+	if err != nil {
+		t.Fatalf("create research folder: %v", err)
+	}
+	nestedPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", researchPath, "Interview Notes")
+	if err != nil {
+		t.Fatalf("create nested folder: %v", err)
+	}
+
+	previousPath, movedPath, err := service.moveProjectHierarchyFolderOnDisk("primary-project", researchPath, operationsPath)
+	if err != nil {
+		t.Fatalf("moveProjectHierarchyFolderOnDisk: %v", err)
+	}
+	if previousPath != researchPath {
+		t.Fatalf("expected previous path %s, got %s", researchPath, previousPath)
+	}
+	if movedPath != "projects/project-primary-project/children/folder-operations/children/folder-research" {
+		t.Fatalf("unexpected moved path: %s", movedPath)
+	}
+
+	if _, err := os.Stat(filepath.Join(rootPath, filepath.FromSlash(researchPath))); !os.IsNotExist(err) {
+		t.Fatalf("expected previous folder path to be gone, got err=%v", err)
+	}
+
+	movedFolderPath := filepath.Join(rootPath, filepath.FromSlash(movedPath))
+	if _, err := os.Stat(filepath.Join(movedFolderPath, "children", filepath.Base(nestedPath))); err != nil {
+		t.Fatalf("expected nested child folder to move with moved parent: %v", err)
+	}
+
+	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(movedFolderPath, "folder.json"))
+	if strings.TrimSpace(asStringForTest(folderPayload["id"])) == "" {
+		t.Fatalf("expected moved folder to preserve stable id, got %#v", folderPayload["id"])
+	}
+	if folderPayload["name"] != "Research" {
+		t.Fatalf("expected moved folder name Research, got %#v", folderPayload["name"])
+	}
+	if folderPayload["slug"] != "research" {
+		t.Fatalf("expected moved folder slug research, got %#v", folderPayload["slug"])
+	}
+	if folderPayload["type"] != "folder" {
+		t.Fatalf("expected moved folder type folder, got %#v", folderPayload["type"])
+	}
+}
+
+func TestMoveProjectTreeFolderOnDiskMovesFolderToNewParent(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	docsPath, _, err := service.createProjectTreeFolderOnDisk("primary-project", "", "Docs")
+	if err != nil {
+		t.Fatalf("create docs folder: %v", err)
+	}
+	archivePath, _, err := service.createProjectTreeFolderOnDisk("primary-project", "", "Archive")
+	if err != nil {
+		t.Fatalf("create archive folder: %v", err)
+	}
+
+	previousPath, movedPath, err := service.moveProjectTreeFolderOnDisk("primary-project", docsPath, archivePath)
+	if err != nil {
+		t.Fatalf("moveProjectTreeFolderOnDisk: %v", err)
+	}
+	if previousPath != docsPath {
+		t.Fatalf("expected previous path %s, got %s", docsPath, previousPath)
+	}
+	if movedPath != "projects/project-primary-project/tree/folder-archive/children/folder-docs" {
+		t.Fatalf("unexpected moved path: %s", movedPath)
+	}
+
+	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, filepath.FromSlash(movedPath), "folder.json"))
+	if folderPayload["name"] != "Docs" {
+		t.Fatalf("expected moved folder name Docs, got %#v", folderPayload["name"])
+	}
+	if folderPayload["slug"] != "docs" {
+		t.Fatalf("expected moved folder slug docs, got %#v", folderPayload["slug"])
+	}
+}
+
+func TestMoveProjectHierarchyFolderOnDiskRejectsDescendantTarget(t *testing.T) {
+	rootPath := filepath.Join(t.TempDir(), "POSIX")
+	service := NewService(nil, rootPath)
+
+	err := service.ensureBootstrapPOSIXSkeleton(
+		InstallationRecord{ID: "installation-1", Name: "MangoPig", Mode: "personal", Access: "local", Protocol: "http", Host: "localhost", IsBootstrapped: true},
+		AdminSummary{ID: "admin-1", Email: "ronald@example.com", DisplayName: "Ronald"},
+		namedRecord{ID: "org-1", Name: "Primary Organization", Slug: "primary-organization"},
+		namedRecord{ID: "dept-1", Name: "Primary Department", Slug: "primary-department"},
+		namedRecord{ID: "team-1", Name: "Primary Team", Slug: "primary-team"},
+		namedRecord{ID: "project-1", Name: "Primary Project", Slug: "primary-project"},
+	)
+	if err != nil {
+		t.Fatalf("ensure bootstrap POSIX skeleton: %v", err)
+	}
+
+	parentPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", "", "Parent")
+	if err != nil {
+		t.Fatalf("create parent folder: %v", err)
+	}
+	childPath, _, err := service.createProjectHierarchyFolderOnDisk("primary-project", parentPath, "Child")
+	if err != nil {
+		t.Fatalf("create child folder: %v", err)
+	}
+
+	_, _, err = service.moveProjectHierarchyFolderOnDisk("primary-project", parentPath, childPath)
+	if !errors.Is(err, ErrInvalidProjectFolderMove) {
+		t.Fatalf("expected ErrInvalidProjectFolderMove, got %v", err)
+	}
+}
+
+func TestBuildProjectHierarchyFolderTreeBuildsNestedStructure(t *testing.T) {
+	rows := []projectHierarchyFolderRow{
+		{ID: "folder-design-id", Path: "projects/project-primary-project/children/folder-design", ParentPath: projectHierarchyRootPath("primary-project"), Label: "Design"},
+		{ID: "folder-research-id", Path: "projects/project-primary-project/children/folder-design/children/folder-research", ParentPath: "projects/project-primary-project/children/folder-design/children", Label: "Research"},
+		{ID: "folder-ops-id", Path: "projects/project-primary-project/children/folder-ops", ParentPath: projectHierarchyRootPath("primary-project"), Label: "Ops"},
+	}
+
+	folders := buildProjectHierarchyFolderTree(rows, projectHierarchyRootPath("primary-project"))
+	if len(folders) != 2 {
+		t.Fatalf("expected 2 top-level folders, got %d", len(folders))
+	}
+	if folders[0].Label != "Design" || folders[1].Label != "Ops" {
+		t.Fatalf("unexpected top-level folder labels: %#v", folders)
+	}
+	if len(folders[0].Children) != 1 || folders[0].Children[0].Label != "Research" {
+		t.Fatalf("unexpected nested folder structure: %#v", folders[0].Children)
+	}
+	if folders[0].ID != "folder-design-id" || folders[0].Path != "projects/project-primary-project/children/folder-design" {
+		t.Fatalf("expected design folder to retain stable id/path, got %#v", folders[0])
+	}
+	if folders[0].Children[0].ID != "folder-research-id" || folders[1].ID != "folder-ops-id" {
+		t.Fatalf("expected nested/top-level folder ids to be preserved, got %#v / %#v", folders[0].Children[0], folders[1])
+	}
+}
+
+func TestApplyProjectHierarchyFolderOrderingOrdersRootAndChildrenByStableID(t *testing.T) {
+	folders := []ProjectHierarchyFolderRecord{
+		{
+			ID:    "folder-design-id",
+			Path:  "projects/project-primary-project/children/folder-design",
+			Label: "Design",
+			Children: []ProjectHierarchyFolderRecord{
+				{ID: "folder-research-id", Path: "projects/project-primary-project/children/folder-design/children/folder-research", Label: "Research"},
+				{ID: "folder-assets-id", Path: "projects/project-primary-project/children/folder-design/children/folder-assets", Label: "Assets"},
+			},
+		},
+		{ID: "folder-ops-id", Path: "projects/project-primary-project/children/folder-ops", Label: "Ops"},
+		{ID: "folder-qa-id", Path: "projects/project-primary-project/children/folder-qa", Label: "QA"},
+	}
+
+	ordered := applyProjectHierarchyFolderOrdering(folders, map[string][]string{
+		projectFolderOrderRootKey: {"folder-qa-id", "folder-design-id"},
+		"folder-design-id":        {"folder-assets-id", "folder-research-id"},
+	})
+
+	if len(ordered) != 3 {
+		t.Fatalf("expected 3 ordered root folders, got %d", len(ordered))
+	}
+	if ordered[0].ID != "folder-qa-id" || ordered[1].ID != "folder-design-id" || ordered[2].ID != "folder-ops-id" {
+		t.Fatalf("unexpected ordered root ids: %#v", ordered)
+	}
+	if len(ordered[1].Children) != 2 {
+		t.Fatalf("expected design folder children to be preserved, got %#v", ordered[1].Children)
+	}
+	if ordered[1].Children[0].ID != "folder-assets-id" || ordered[1].Children[1].ID != "folder-research-id" {
+		t.Fatalf("unexpected ordered child ids: %#v", ordered[1].Children)
+	}
+}
+
+func TestInsertFolderOrderReordersWithinSameParent(t *testing.T) {
+	folderOrder := map[string][]string{
+		projectFolderOrderRootKey: {"folder-a", "folder-b", "folder-c"},
+	}
+
+	insertFolderOrder(folderOrder, "", "folder-c", 0)
+
+	got := folderOrder[projectFolderOrderRootKey]
+	if len(got) != 3 || got[0] != "folder-c" || got[1] != "folder-a" || got[2] != "folder-b" {
+		t.Fatalf("unexpected reordered root children: %#v", got)
+	}
+}
+
+func asStringForTest(value any) string {
+	text, _ := value.(string)
+	return text
+}
+
+func readJSONFileForTest[T any](t *testing.T, path string) T {
+	t.Helper()
+
+	data, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("read %s: %v", path, err)
+	}
+
+	var payload T
+	if err := json.Unmarshal(data, &payload); err != nil {
+		t.Fatalf("unmarshal %s: %v", path, err)
+	}
+
+	return payload
+}

Backend/internal/config/config.go

@@ -17,6 +17,7 @@ type Config struct {
 	APIPort         string
 	PostgresURL     string
 	ValkeyURL       string
+	POSIXRoot       string
 	ShutdownTimeout time.Duration
 }
 
@@ -29,6 +30,7 @@ func Load() *Config {
 		APIPort:         getEnv("BACKEND_API_PORT", "8081"),
 		PostgresURL:     getEnv("DATABASE_URL", "postgres://moku:moku_dev_password@localhost:5432/moku?sslmode=disable"),
 		ValkeyURL:       getEnv("VALKEY_URL", "redis://localhost:6379/0"),
+		POSIXRoot:       getEnv("POSIX_ROOT", "../POSIX"),
 		ShutdownTimeout: getDurationEnv("BACKEND_SHUTDOWN_TIMEOUT", 10*time.Second),
 	}
 }

Backend/internal/httpx/api_bootstrap_routes.go

@@ -341,7 +341,7 @@ func (routes apiRoutes) handleBootstrapStructureStep(w http.ResponseWriter, r *h
 }
 
 func (routes apiRoutes) bootstrapService() *bootstrapservice.Service {
-	return bootstrapservice.NewService(routes.cfg.Database)
+	return bootstrapservice.NewService(routes.cfg.Database, routes.cfg.Config.POSIXRoot)
 }
 
 func (routes apiRoutes) writeBootstrapStepResponse(w http.ResponseWriter, status int, step string, payload any) {

Backend/internal/httpx/api_project_routes.go

@@ -0,0 +1,717 @@
+package httpx
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+	"strings"
+
+	bootstrapservice "moku-backend/internal/bootstrap"
+
+	"github.com/go-chi/chi/v5"
+)
+
+type createProjectFolderRequest struct {
+	Name             string `json:"name"`
+	ParentFolderPath string `json:"parentFolderId"`
+}
+
+type renameProjectFolderRequest struct {
+	FolderPath string `json:"folderId"`
+	Name       string `json:"name"`
+}
+
+type deleteProjectFolderRequest struct {
+	FolderPath string `json:"folderId"`
+}
+
+// Keep the existing JSON contract for the frontend, but use clearer path-vs-stable-ID
+// names internally so the move flow is easier to reason about.
+type moveProjectFolderRequest struct {
+	FolderPath       string `json:"folderId"`
+	FolderStableID   string `json:"folderNodeId"`
+	ParentFolderPath string `json:"parentFolderId"`
+	ParentStableID   string `json:"parentNodeId"`
+	TargetIndex      int    `json:"targetIndex"`
+}
+
+type createProjectItemRequest struct {
+	Name             string `json:"name"`
+	ParentFolderPath string `json:"parentFolderId"`
+	ItemType         string `json:"itemType"`
+}
+
+type deleteProjectItemRequest struct {
+	ItemPath string `json:"itemId"`
+}
+
+type moveProjectItemRequest struct {
+	ItemPath         string `json:"itemId"`
+	ItemStableID     string `json:"itemNodeId"`
+	ParentFolderPath string `json:"parentFolderId"`
+	ParentStableID   string `json:"parentNodeId"`
+	TargetIndex      int    `json:"targetIndex"`
+}
+
+func (routes apiRoutes) handleProjectFolders(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	folders, err := routes.bootstrapService().GetProjectHierarchyFolders(r.Context(), projectID)
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "load")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": map[string]any{
+			"projectId": projectID,
+			"folders":   folders,
+		},
+		"meta": map[string]any{
+			"resource": "project-folders",
+		},
+	})
+}
+
+func (routes apiRoutes) handleCreateProjectFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeProjectFolderRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.Name = strings.TrimSpace(payload.Name)
+	payload.ParentFolderPath = strings.TrimSpace(payload.ParentFolderPath)
+	if payload.Name == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder name is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().CreateProjectFolder(r.Context(), bootstrapservice.CreateProjectFolderInput{
+		ProjectID:        projectID,
+		ParentFolderPath: payload.ParentFolderPath,
+		Name:             payload.Name,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "persist")
+		return
+	}
+
+	WriteJSON(w, http.StatusCreated, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-folder-create",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleDeleteProjectFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload := decodeDeleteProjectFolderRequest(r)
+	if strings.TrimSpace(payload.FolderPath) == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().DeleteProjectFolder(r.Context(), bootstrapservice.DeleteProjectFolderInput{
+		ProjectID:  projectID,
+		FolderPath: payload.FolderPath,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "delete")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-folder-delete",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleRenameProjectFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeRenameProjectFolderRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.FolderPath = strings.TrimSpace(payload.FolderPath)
+	payload.Name = strings.TrimSpace(payload.Name)
+	if payload.FolderPath == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+	if payload.Name == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder name is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().RenameProjectFolder(r.Context(), bootstrapservice.RenameProjectFolderInput{
+		ProjectID:  projectID,
+		FolderPath: payload.FolderPath,
+		Name:       payload.Name,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "rename")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-folder-rename",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleMoveProjectFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeMoveProjectFolderRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.FolderPath = strings.TrimSpace(payload.FolderPath)
+	payload.FolderStableID = strings.TrimSpace(payload.FolderStableID)
+	payload.ParentFolderPath = strings.TrimSpace(payload.ParentFolderPath)
+	payload.ParentStableID = strings.TrimSpace(payload.ParentStableID)
+	if payload.FolderPath == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().MoveProjectFolder(r.Context(), bootstrapservice.MoveProjectFolderInput{
+		ProjectID:        projectID,
+		FolderPath:       payload.FolderPath,
+		FolderStableID:   payload.FolderStableID,
+		ParentFolderPath: payload.ParentFolderPath,
+		ParentStableID:   payload.ParentStableID,
+		TargetIndex:      payload.TargetIndex,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "move")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-folder-move",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleProjectTreeFolders(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	folders, err := routes.bootstrapService().GetProjectTreeFolders(r.Context(), projectID)
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "load")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": map[string]any{
+			"projectId": projectID,
+			"folders":   folders,
+		},
+		"meta": map[string]any{
+			"resource": "project-tree-folders",
+		},
+	})
+}
+
+func (routes apiRoutes) handleProjectTree(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	nodes, err := routes.bootstrapService().GetProjectTreeNodes(r.Context(), projectID)
+	if err != nil {
+		routes.writeProjectTreeError(w, r, err, "load")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": map[string]any{
+			"projectId": projectID,
+			"nodes":     nodes,
+		},
+		"meta": map[string]any{
+			"resource": "project-tree",
+		},
+	})
+}
+
+func (routes apiRoutes) handleCreateProjectTreeFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeProjectFolderRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.Name = strings.TrimSpace(payload.Name)
+	payload.ParentFolderPath = strings.TrimSpace(payload.ParentFolderPath)
+	if payload.Name == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder name is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().CreateProjectTreeFolder(r.Context(), bootstrapservice.CreateProjectFolderInput{
+		ProjectID:        projectID,
+		ParentFolderPath: payload.ParentFolderPath,
+		Name:             payload.Name,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "persist")
+		return
+	}
+
+	WriteJSON(w, http.StatusCreated, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-folder-create",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleDeleteProjectTreeFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload := decodeDeleteProjectFolderRequest(r)
+	if strings.TrimSpace(payload.FolderPath) == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().DeleteProjectTreeFolder(r.Context(), bootstrapservice.DeleteProjectFolderInput{
+		ProjectID:  projectID,
+		FolderPath: payload.FolderPath,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "delete")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-folder-delete",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleRenameProjectTreeFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeRenameProjectFolderRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.FolderPath = strings.TrimSpace(payload.FolderPath)
+	payload.Name = strings.TrimSpace(payload.Name)
+	if payload.FolderPath == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+	if payload.Name == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder name is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().RenameProjectTreeFolder(r.Context(), bootstrapservice.RenameProjectFolderInput{
+		ProjectID:  projectID,
+		FolderPath: payload.FolderPath,
+		Name:       payload.Name,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "rename")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-folder-rename",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleMoveProjectTreeFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeMoveProjectFolderRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.FolderPath = strings.TrimSpace(payload.FolderPath)
+	payload.FolderStableID = strings.TrimSpace(payload.FolderStableID)
+	payload.ParentFolderPath = strings.TrimSpace(payload.ParentFolderPath)
+	payload.ParentStableID = strings.TrimSpace(payload.ParentStableID)
+	if payload.FolderPath == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().MoveProjectTreeFolder(r.Context(), bootstrapservice.MoveProjectFolderInput{
+		ProjectID:        projectID,
+		FolderPath:       payload.FolderPath,
+		FolderStableID:   payload.FolderStableID,
+		ParentFolderPath: payload.ParentFolderPath,
+		ParentStableID:   payload.ParentStableID,
+		TargetIndex:      payload.TargetIndex,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "move")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-folder-move",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleCreateProjectTreeItem(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeProjectItemRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.Name = strings.TrimSpace(payload.Name)
+	payload.ParentFolderPath = strings.TrimSpace(payload.ParentFolderPath)
+	payload.ItemType = strings.TrimSpace(payload.ItemType)
+	if payload.Name == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Item name is required.")
+		return
+	}
+	if payload.ItemType == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Item type is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().CreateProjectTreeItem(r.Context(), bootstrapservice.CreateProjectItemInput{
+		ProjectID:        projectID,
+		ParentFolderPath: payload.ParentFolderPath,
+		Name:             payload.Name,
+		ItemType:         payload.ItemType,
+	})
+	if err != nil {
+		routes.writeProjectTreeError(w, r, err, "persist")
+		return
+	}
+
+	WriteJSON(w, http.StatusCreated, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-item-create",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleDeleteProjectTreeItem(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload := decodeDeleteProjectItemRequest(r)
+	if strings.TrimSpace(payload.ItemPath) == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Item ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().DeleteProjectTreeItem(r.Context(), bootstrapservice.DeleteProjectItemInput{
+		ProjectID: projectID,
+		ItemPath:  payload.ItemPath,
+	})
+	if err != nil {
+		routes.writeProjectTreeError(w, r, err, "delete")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-item-delete",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) handleMoveProjectTreeItem(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload, ok := decodeMoveProjectItemRequest(w, r)
+	if !ok {
+		return
+	}
+
+	payload.ItemPath = strings.TrimSpace(payload.ItemPath)
+	payload.ItemStableID = strings.TrimSpace(payload.ItemStableID)
+	payload.ParentFolderPath = strings.TrimSpace(payload.ParentFolderPath)
+	payload.ParentStableID = strings.TrimSpace(payload.ParentStableID)
+	if payload.ItemPath == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Item ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().MoveProjectTreeItem(r.Context(), bootstrapservice.MoveProjectItemInput{
+		ProjectID:        projectID,
+		ItemPath:         payload.ItemPath,
+		ItemStableID:     payload.ItemStableID,
+		ParentFolderPath: payload.ParentFolderPath,
+		ParentStableID:   payload.ParentStableID,
+		TargetIndex:      payload.TargetIndex,
+	})
+	if err != nil {
+		routes.writeProjectTreeError(w, r, err, "move")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-item-move",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) writeProjectFolderError(w http.ResponseWriter, r *http.Request, err error, operation string) {
+	switch {
+	case errors.Is(err, bootstrapservice.ErrProjectNotFound), errors.Is(err, bootstrapservice.ErrProjectFolderNotFound):
+		WriteError(w, http.StatusNotFound, RequestIDFromContext(r.Context()), "not_found", err.Error())
+	case errors.Is(err, bootstrapservice.ErrInvalidProjectFolderMove):
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", err.Error())
+	default:
+		routes.cfg.Logger.Error(operation+" project folder", "error", err, "path", r.URL.Path)
+		message := "Failed to " + operation + " project folder."
+		if routes.cfg.Config.IsDevelopment() {
+			message = message + " " + err.Error()
+		}
+		WriteError(w, http.StatusInternalServerError, RequestIDFromContext(r.Context()), "project_folder_"+operation+"_failed", message)
+	}
+}
+
+func (routes apiRoutes) writeProjectTreeError(w http.ResponseWriter, r *http.Request, err error, operation string) {
+	switch {
+	case errors.Is(err, bootstrapservice.ErrProjectNotFound), errors.Is(err, bootstrapservice.ErrProjectFolderNotFound), errors.Is(err, bootstrapservice.ErrProjectItemNotFound):
+		WriteError(w, http.StatusNotFound, RequestIDFromContext(r.Context()), "not_found", err.Error())
+	case errors.Is(err, bootstrapservice.ErrInvalidProjectFolderMove), errors.Is(err, bootstrapservice.ErrInvalidProjectItemMove):
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", err.Error())
+	default:
+		routes.cfg.Logger.Error(operation+" project tree", "error", err, "path", r.URL.Path)
+		message := "Failed to " + operation + " project tree."
+		if routes.cfg.Config.IsDevelopment() {
+			message = message + " " + err.Error()
+		}
+		WriteError(w, http.StatusInternalServerError, RequestIDFromContext(r.Context()), "project_tree_"+operation+"_failed", message)
+	}
+}
+
+func decodeMoveProjectFolderRequest(w http.ResponseWriter, r *http.Request) (moveProjectFolderRequest, bool) {
+	var payload moveProjectFolderRequest
+
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	if err := decoder.Decode(&payload); err != nil {
+		if errors.Is(err, io.EOF) {
+			WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body is required and must be valid JSON.")
+			return payload, false
+		}
+
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must be valid JSON.")
+		return payload, false
+	}
+
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must contain a single JSON object.")
+		return payload, false
+	}
+
+	return payload, true
+}
+
+func decodeDeleteProjectFolderRequest(r *http.Request) deleteProjectFolderRequest {
+	return deleteProjectFolderRequest{
+		FolderPath: strings.TrimSpace(r.URL.Query().Get("folderId")),
+	}
+}
+
+func decodeDeleteProjectItemRequest(r *http.Request) deleteProjectItemRequest {
+	return deleteProjectItemRequest{
+		ItemPath: strings.TrimSpace(r.URL.Query().Get("itemId")),
+	}
+}
+
+func decodeRenameProjectFolderRequest(w http.ResponseWriter, r *http.Request) (renameProjectFolderRequest, bool) {
+	var payload renameProjectFolderRequest
+
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	if err := decoder.Decode(&payload); err != nil {
+		if errors.Is(err, io.EOF) {
+			WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body is required and must be valid JSON.")
+			return payload, false
+		}
+
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must be valid JSON.")
+		return payload, false
+	}
+
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must contain a single JSON object.")
+		return payload, false
+	}
+
+	return payload, true
+}
+
+func decodeProjectFolderRequest(w http.ResponseWriter, r *http.Request) (createProjectFolderRequest, bool) {
+	var payload createProjectFolderRequest
+
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	if err := decoder.Decode(&payload); err != nil {
+		if errors.Is(err, io.EOF) {
+			WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body is required and must be valid JSON.")
+			return payload, false
+		}
+
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must be valid JSON.")
+		return payload, false
+	}
+
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must contain a single JSON object.")
+		return payload, false
+	}
+
+	return payload, true
+}
+
+func decodeProjectItemRequest(w http.ResponseWriter, r *http.Request) (createProjectItemRequest, bool) {
+	var payload createProjectItemRequest
+
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	if err := decoder.Decode(&payload); err != nil {
+		if errors.Is(err, io.EOF) {
+			WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body is required and must be valid JSON.")
+			return payload, false
+		}
+
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must be valid JSON.")
+		return payload, false
+	}
+
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must contain a single JSON object.")
+		return payload, false
+	}
+
+	return payload, true
+}
+
+func decodeMoveProjectItemRequest(w http.ResponseWriter, r *http.Request) (moveProjectItemRequest, bool) {
+	var payload moveProjectItemRequest
+
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	if err := decoder.Decode(&payload); err != nil {
+		if errors.Is(err, io.EOF) {
+			WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body is required and must be valid JSON.")
+			return payload, false
+		}
+
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must be valid JSON.")
+		return payload, false
+	}
+
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must contain a single JSON object.")
+		return payload, false
+	}
+
+	return payload, true
+}

Backend/internal/httpx/api_routes.go

@@ -33,6 +33,22 @@ func (routes apiRoutes) Register(router chi.Router) {
 		apiRouter.Get("/app-shell", routes.handleAppShellState)
 		apiRouter.Get("/organizations", routes.handleOrganizations)
 		apiRouter.Get("/workspaces", routes.handleWorkspaces)
+		apiRouter.Route("/projects/{projectId}", func(projectRouter chi.Router) {
+			projectRouter.Get("/folders", routes.handleProjectFolders)
+			projectRouter.Post("/folders", routes.handleCreateProjectFolder)
+			projectRouter.Patch("/folders", routes.handleRenameProjectFolder)
+			projectRouter.Patch("/folders/move", routes.handleMoveProjectFolder)
+			projectRouter.Delete("/folders", routes.handleDeleteProjectFolder)
+			projectRouter.Get("/tree", routes.handleProjectTree)
+			projectRouter.Get("/tree/folders", routes.handleProjectTreeFolders)
+			projectRouter.Post("/tree/folders", routes.handleCreateProjectTreeFolder)
+			projectRouter.Patch("/tree/folders", routes.handleRenameProjectTreeFolder)
+			projectRouter.Patch("/tree/folders/move", routes.handleMoveProjectTreeFolder)
+			projectRouter.Delete("/tree/folders", routes.handleDeleteProjectTreeFolder)
+			projectRouter.Post("/tree/items", routes.handleCreateProjectTreeItem)
+			projectRouter.Patch("/tree/items/move", routes.handleMoveProjectTreeItem)
+			projectRouter.Delete("/tree/items", routes.handleDeleteProjectTreeItem)
+		})
 
 		if routes.cfg.Config.IsDevelopment() {
 			apiRouter.Post("/dev/bootstrap/reset", routes.handleDevelopmentBootstrapReset)

Backend/internal/jobs/store.go

@@ -0,0 +1,196 @@
+package jobs
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+
+	"moku-backend/internal/database"
+)
+
+const (
+	KindBootstrapStructureMaterialize = "bootstrap.structure.materialize"
+)
+
+type Status string
+
+const (
+	StatusPending   Status = "pending"
+	StatusRunning   Status = "running"
+	StatusSucceeded Status = "succeeded"
+	StatusFailed    Status = "failed"
+)
+
+type BootstrapStructureMaterializePayload struct {
+	InstallationID string `json:"installationId"`
+}
+
+type Job struct {
+	ID          string
+	Kind        string
+	Status      Status
+	Payload     json.RawMessage
+	Attempts    int
+	MaxAttempts int
+	AvailableAt time.Time
+	StartedAt   *time.Time
+	FinishedAt  *time.Time
+	LastError   *string
+	CreatedAt   time.Time
+	UpdatedAt   time.Time
+}
+
+type EnqueueInput struct {
+	Kind        string
+	Payload     any
+	AvailableAt time.Time
+	MaxAttempts int
+}
+
+type Store struct {
+	db *database.DB
+}
+
+func NewStore(db *database.DB) *Store {
+	return &Store{db: db}
+}
+
+func (store *Store) Enqueue(ctx context.Context, input EnqueueInput) (Job, error) {
+	payload := json.RawMessage([]byte(`{}`))
+	if input.Payload != nil {
+		encoded, err := json.Marshal(input.Payload)
+		if err != nil {
+			return Job{}, err
+		}
+		payload = encoded
+	}
+
+	availableAt := input.AvailableAt
+	if availableAt.IsZero() {
+		availableAt = time.Now().UTC()
+	}
+
+	maxAttempts := input.MaxAttempts
+	if maxAttempts < 1 {
+		maxAttempts = 1
+	}
+
+	return scanJob(store.db.Pool.QueryRow(ctx, `
+		INSERT INTO background_jobs (kind, status, payload, attempts, max_attempts, available_at)
+		VALUES ($1, 'pending'::background_job_status, $2::jsonb, 0, $3, $4)
+		RETURNING
+			id::text,
+			kind,
+			status::text,
+			payload,
+			attempts,
+			max_attempts,
+			available_at,
+			started_at,
+			finished_at,
+			last_error,
+			created_at,
+			updated_at;
+	`, strings.TrimSpace(input.Kind), payload, maxAttempts, availableAt))
+}
+
+func (store *Store) ClaimNext(ctx context.Context) (*Job, error) {
+	job, err := scanJob(store.db.Pool.QueryRow(ctx, `
+		WITH next_job AS (
+			SELECT id
+			FROM background_jobs
+			WHERE status = 'pending'::background_job_status
+				AND available_at <= NOW()
+			ORDER BY created_at ASC
+			LIMIT 1
+			FOR UPDATE SKIP LOCKED
+		)
+		UPDATE background_jobs AS jobs
+		SET
+			status = 'running'::background_job_status,
+			attempts = jobs.attempts + 1,
+			started_at = NOW(),
+			finished_at = NULL,
+			last_error = NULL,
+			updated_at = NOW()
+		FROM next_job
+		WHERE jobs.id = next_job.id
+		RETURNING
+			jobs.id::text,
+			jobs.kind,
+			jobs.status::text,
+			jobs.payload,
+			jobs.attempts,
+			jobs.max_attempts,
+			jobs.available_at,
+			jobs.started_at,
+			jobs.finished_at,
+			jobs.last_error,
+			jobs.created_at,
+			jobs.updated_at;
+	`))
+	if err != nil {
+		if err == pgx.ErrNoRows {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &job, nil
+}
+
+func (store *Store) MarkSucceeded(ctx context.Context, jobID string) error {
+	_, err := store.db.Pool.Exec(ctx, `
+		UPDATE background_jobs
+		SET
+			status = 'succeeded'::background_job_status,
+			finished_at = NOW(),
+			last_error = NULL,
+			updated_at = NOW()
+		WHERE id = $1::uuid;
+	`, strings.TrimSpace(jobID))
+
+	return err
+}
+
+func (store *Store) MarkFailed(ctx context.Context, jobID, failure string) error {
+	_, err := store.db.Pool.Exec(ctx, `
+		UPDATE background_jobs
+		SET
+			status = 'failed'::background_job_status,
+			finished_at = NOW(),
+			last_error = $2,
+			updated_at = NOW()
+		WHERE id = $1::uuid;
+	`, strings.TrimSpace(jobID), strings.TrimSpace(failure))
+
+	return err
+}
+
+func scanJob(row pgx.Row) (Job, error) {
+	var job Job
+	var status string
+	if err := row.Scan(
+		&job.ID,
+		&job.Kind,
+		&status,
+		&job.Payload,
+		&job.Attempts,
+		&job.MaxAttempts,
+		&job.AvailableAt,
+		&job.StartedAt,
+		&job.FinishedAt,
+		&job.LastError,
+		&job.CreatedAt,
+		&job.UpdatedAt,
+	); err != nil {
+		return Job{}, err
+	}
+
+	job.Status = Status(status)
+	return job, nil
+}

Backend/internal/posixproj/projector.go

@@ -0,0 +1,553 @@
+package posixproj
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"moku-backend/internal/database"
+)
+
+const rootProjectionPath = "/"
+
+type Projector struct {
+	db   *database.DB
+	root string
+}
+
+type RebuildSummary struct {
+	TotalNodes      int
+	DirectoryCount  int
+	FileCount       int
+}
+
+type NodeKind string
+
+const (
+	NodeKindDirectory NodeKind = "directory"
+	NodeKindFile      NodeKind = "file"
+)
+
+type Scope struct {
+	InstallationID  string
+	OrganizationID  string
+	OrganizationSlug string
+	DepartmentSlug  string
+	TeamSlug        string
+	ProjectSlug     string
+	PersonalSlug    string
+}
+
+type Node struct {
+	Path            string
+	ParentPath      *string
+	Name            string
+	Depth           int
+	NodeKind        NodeKind
+	LogicalType     string
+	FileRole        string
+	ResourceID      string
+	ResourceName    string
+	ResourceSlug    string
+	InstallationID  string
+	OrganizationID  string
+	OrganizationSlug string
+	DepartmentSlug  string
+	TeamSlug        string
+	ProjectSlug     string
+	PersonalSlug    string
+	ContentJSON     []byte
+	SizeBytes       int64
+	Checksum        string
+}
+
+func NewProjector(db *database.DB, root string) *Projector {
+	return &Projector{db: db, root: strings.TrimSpace(root)}
+}
+
+func (projector *Projector) Rebuild(ctx context.Context) error {
+	_, err := projector.RebuildWithSummary(ctx)
+	return err
+}
+
+func (projector *Projector) RebuildWithSummary(ctx context.Context) (RebuildSummary, error) {
+	if projector == nil || projector.db == nil || projector.db.Pool == nil {
+		return RebuildSummary{}, nil
+	}
+
+	nodes, err := ScanRoot(projector.root)
+	if err != nil {
+		return RebuildSummary{}, err
+	}
+
+	summary := summarizeNodes(nodes)
+
+	tx, err := projector.db.Pool.Begin(ctx)
+	if err != nil {
+		return RebuildSummary{}, err
+	}
+	defer func() {
+		_ = tx.Rollback(ctx)
+	}()
+
+	if _, err := tx.Exec(ctx, `DELETE FROM posix_nodes;`); err != nil {
+		return RebuildSummary{}, fmt.Errorf("clear posix_nodes: %w", err)
+	}
+
+	for _, node := range nodes {
+		if _, err := tx.Exec(ctx, `
+			INSERT INTO posix_nodes (
+				path,
+				parent_path,
+				name,
+				depth,
+				node_kind,
+				logical_type,
+				file_role,
+				resource_id,
+				resource_name,
+				resource_slug,
+				installation_id,
+				organization_id,
+				organization_slug,
+				department_slug,
+				team_slug,
+				project_slug,
+				personal_slug,
+				content_json,
+				size_bytes,
+				checksum
+			) VALUES (
+				$1, $2, $3, $4, $5::posix_node_kind, $6, $7, $8, $9, $10,
+				$11, $12, $13, $14, $15, $16, $17, $18::jsonb, $19, $20
+			);
+		`,
+			node.Path,
+			node.ParentPath,
+			node.Name,
+			node.Depth,
+			string(node.NodeKind),
+			node.LogicalType,
+			node.FileRole,
+			node.ResourceID,
+			node.ResourceName,
+			node.ResourceSlug,
+			node.InstallationID,
+			node.OrganizationID,
+			node.OrganizationSlug,
+			node.DepartmentSlug,
+			node.TeamSlug,
+			node.ProjectSlug,
+			node.PersonalSlug,
+				node.ContentJSON,
+				node.SizeBytes,
+				node.Checksum,
+		); err != nil {
+			return RebuildSummary{}, fmt.Errorf("insert posix node %s: %w", node.Path, err)
+		}
+	}
+
+	if err := tx.Commit(ctx); err != nil {
+		return RebuildSummary{}, err
+	}
+
+	return summary, nil
+}
+
+func ScanRoot(root string) ([]Node, error) {
+	rootPath := strings.TrimSpace(root)
+	if rootPath == "" {
+		return nil, nil
+	}
+
+	info, err := os.Stat(rootPath)
+	if err != nil {
+		return nil, fmt.Errorf("stat POSIX root: %w", err)
+	}
+	if !info.IsDir() {
+		return nil, fmt.Errorf("POSIX root is not a directory: %s", rootPath)
+	}
+
+	rootScope, err := loadRootScope(rootPath)
+	if err != nil {
+		return nil, err
+	}
+
+	nodes := []Node{{
+		Path:             rootProjectionPath,
+		ParentPath:       nil,
+		Name:             filepath.Base(rootPath),
+		Depth:            0,
+		NodeKind:         NodeKindDirectory,
+		LogicalType:      "tenant_root",
+		InstallationID:   rootScope.InstallationID,
+		OrganizationID:   rootScope.OrganizationID,
+		OrganizationSlug: rootScope.OrganizationSlug,
+	}}
+
+	err = filepath.WalkDir(rootPath, func(path string, entry fs.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			return walkErr
+		}
+		if path == rootPath {
+			return nil
+		}
+
+		relPath, err := filepath.Rel(rootPath, path)
+		if err != nil {
+			return err
+		}
+		relPath = filepath.ToSlash(relPath)
+		if relPath == "." {
+			return nil
+		}
+
+		node, err := buildNode(rootPath, relPath, entry, rootScope)
+		if err != nil {
+			return err
+		}
+
+		nodes = append(nodes, node)
+		return nil
+	})
+	if err != nil {
+		return nil, fmt.Errorf("scan POSIX root: %w", err)
+	}
+
+	return nodes, nil
+}
+
+func loadRootScope(rootPath string) (Scope, error) {
+	settingsPath := filepath.Join(rootPath, "settings.json")
+	content, err := os.ReadFile(settingsPath)
+	if err != nil {
+		if errorsIsNotExist(err) {
+			return Scope{}, nil
+		}
+		return Scope{}, fmt.Errorf("read root settings.json: %w", err)
+	}
+
+	var payload map[string]any
+	if err := json.Unmarshal(content, &payload); err != nil {
+		return Scope{}, fmt.Errorf("decode root settings.json: %w", err)
+	}
+
+	installation, _ := payload["installation"].(map[string]any)
+	organization, _ := payload["organization"].(map[string]any)
+
+	return Scope{
+		InstallationID:  stringValue(installation["id"]),
+		OrganizationID:  stringValue(organization["id"]),
+		OrganizationSlug: stringValue(organization["slug"]),
+	}, nil
+}
+
+func buildNode(rootPath, relPath string, entry fs.DirEntry, rootScope Scope) (Node, error) {
+	scope := deriveScope(relPath, rootScope)
+	parentPath := projectionParentPath(relPath)
+	logicalType, fileRole := classifyPath(relPath, entry.IsDir())
+
+	node := Node{
+		Path:             relPath,
+		ParentPath:       parentPath,
+		Name:             entry.Name(),
+		Depth:            strings.Count(relPath, "/") + 1,
+		NodeKind:         NodeKindDirectory,
+		LogicalType:      logicalType,
+		FileRole:         fileRole,
+		InstallationID:   scope.InstallationID,
+		OrganizationID:   scope.OrganizationID,
+		OrganizationSlug: scope.OrganizationSlug,
+		DepartmentSlug:   scope.DepartmentSlug,
+		TeamSlug:         scope.TeamSlug,
+		ProjectSlug:      scope.ProjectSlug,
+		PersonalSlug:     scope.PersonalSlug,
+	}
+
+	if entry.IsDir() {
+		return node, nil
+	}
+
+	absPath := filepath.Join(rootPath, filepath.FromSlash(relPath))
+	content, err := os.ReadFile(absPath)
+	if err != nil {
+		return Node{}, fmt.Errorf("read POSIX file %s: %w", relPath, err)
+	}
+
+	hash := sha256.Sum256(content)
+	node.NodeKind = NodeKindFile
+	node.SizeBytes = int64(len(content))
+	node.Checksum = hex.EncodeToString(hash[:])
+
+	if strings.EqualFold(filepath.Ext(entry.Name()), ".json") {
+		var payload map[string]any
+		if err := json.Unmarshal(content, &payload); err == nil {
+			jsonContent, err := json.Marshal(payload)
+			if err != nil {
+				return Node{}, fmt.Errorf("remarshal POSIX file %s: %w", relPath, err)
+			}
+			node.ContentJSON = jsonContent
+			node.ResourceID = stringValue(payload["id"])
+			node.ResourceName = stringValue(payload["name"])
+			node.ResourceSlug = stringValue(payload["slug"])
+			if node.ResourceID == "" && fileRole == "settings" && logicalType == "tenant" {
+				installation, _ := payload["installation"].(map[string]any)
+				organization, _ := payload["organization"].(map[string]any)
+				node.ResourceID = stringValue(installation["id"])
+				node.ResourceName = stringValue(installation["name"])
+				node.InstallationID = stringValue(installation["id"])
+				node.OrganizationID = stringValue(organization["id"])
+				node.OrganizationSlug = firstNonEmpty(node.OrganizationSlug, stringValue(organization["slug"]))
+			}
+			if node.ResourceID == "" && fileRole == "users" {
+				node.ResourceName = firstNonEmpty(node.ResourceName, parentEntityName(logicalType, scope))
+			}
+		}
+	}
+
+	if node.ResourceSlug == "" {
+		node.ResourceSlug = inferredResourceSlug(logicalType, scope)
+	}
+
+	return node, nil
+}
+
+func deriveScope(relPath string, rootScope Scope) Scope {
+	scope := rootScope
+	parts := strings.Split(relPath, "/")
+	for _, part := range parts {
+		switch {
+		case strings.HasPrefix(part, "department-"):
+			scope.DepartmentSlug = strings.TrimPrefix(part, "department-")
+		case strings.HasPrefix(part, "team-"):
+			scope.TeamSlug = strings.TrimPrefix(part, "team-")
+		case strings.HasPrefix(part, "project-"):
+			scope.ProjectSlug = strings.TrimPrefix(part, "project-")
+		case strings.HasPrefix(part, "personal-"):
+			scope.PersonalSlug = strings.TrimPrefix(part, "personal-")
+		}
+	}
+	return scope
+}
+
+func classifyPath(relPath string, isDir bool) (logicalType, fileRole string) {
+	parts := strings.Split(relPath, "/")
+	name := parts[len(parts)-1]
+	if !isDir {
+		fileRole = strings.TrimSuffix(name, filepath.Ext(name))
+	}
+
+	hasChildrenAncestor := pathContainsSegment(parts, "children")
+	hasTreeAncestor := pathContainsSegment(parts, "tree")
+	parentName := ""
+	if len(parts) >= 2 {
+		parentName = parts[len(parts)-2]
+	}
+
+	switch {
+	case relPath == "settings.json":
+		return "tenant", "settings"
+	case relPath == "layout.json":
+		return "tenant", "layout"
+	case len(parts) >= 1 && parts[0] == "catalog":
+		if isDir {
+			if len(parts) == 1 {
+				return "catalog", ""
+			}
+			if len(parts) >= 2 && parts[1] == "packs" {
+				if len(parts) == 2 {
+					return "catalog_packs", ""
+				}
+				if len(parts) == 3 {
+					return "catalog_pack", ""
+				}
+				if len(parts) >= 4 && parts[3] == "entries" {
+					return "catalog_pack_entries", ""
+				}
+				return "catalog_entry", ""
+			}
+			if len(parts) >= 2 && parts[1] == "standalone" {
+				if len(parts) == 2 {
+					return "catalog_standalone", ""
+				}
+				return "catalog_entry", ""
+			}
+		}
+		return "catalog", fileRole
+	case len(parts) >= 2 && parts[0] == "departments" && strings.HasPrefix(parts[1], "department-"):
+		if isDir {
+			if len(parts) == 2 {
+				return "department", ""
+			}
+			if len(parts) == 3 && parts[2] == "teams" {
+				return "department_teams", ""
+			}
+			if len(parts) >= 4 && strings.HasPrefix(parts[3], "team-") {
+				return "team", ""
+			}
+		}
+		if len(parts) >= 4 && strings.HasPrefix(parts[3], "team-") {
+			return "team", fileRole
+		}
+		return "department", fileRole
+	case len(parts) >= 2 && parts[0] == "projects" && strings.HasPrefix(parts[1], "project-"):
+		if isDir {
+			if strings.HasPrefix(name, "project-") {
+				return "project", ""
+			}
+			if name == "children" {
+				return "project_children", ""
+			}
+			if name == "tree" {
+				return "project_tree", ""
+			}
+			if hasChildrenAncestor && strings.HasPrefix(name, "folder-") {
+				return "hierarchy_folder", ""
+			}
+			if hasTreeAncestor && strings.HasPrefix(name, "folder-") {
+				return "hierarchy_folder", ""
+			}
+			if hasTreeAncestor && strings.HasPrefix(name, "item-") {
+				return "item", ""
+			}
+		}
+		if hasChildrenAncestor && strings.HasPrefix(parentName, "folder-") {
+			return "hierarchy_folder", fileRole
+		}
+		if hasTreeAncestor {
+			if strings.HasPrefix(parentName, "item-") {
+				return "item", fileRole
+			}
+			if strings.HasPrefix(parentName, "folder-") {
+				return "hierarchy_folder", fileRole
+			}
+		}
+		return "project", fileRole
+	case len(parts) >= 1 && parts[0] == "users":
+		if isDir {
+			if len(parts) == 1 {
+				return "users", ""
+			}
+			if len(parts) == 2 && parts[1] == "personals" {
+				return "personals", ""
+			}
+			if len(parts) >= 3 && parts[1] == "personals" && strings.HasPrefix(parts[2], "personal-") {
+				return "personal", ""
+			}
+			if strings.Contains(relPath, "/tree/") || strings.HasSuffix(relPath, "/tree") {
+				if strings.HasPrefix(name, "folder-") {
+					return "folder", ""
+				}
+				if strings.HasPrefix(name, "item-") {
+					return "item", ""
+				}
+			}
+		}
+		if len(parts) >= 3 && parts[1] == "personals" && strings.HasPrefix(parts[2], "personal-") {
+			if strings.Contains(relPath, "/tree/") {
+				if strings.HasPrefix(parts[len(parts)-2], "item-") {
+					return "item", fileRole
+				}
+				if strings.HasPrefix(parts[len(parts)-2], "folder-") {
+					return "folder", fileRole
+				}
+			}
+			return "personal", fileRole
+		}
+		return "users", fileRole
+	default:
+		if isDir {
+			return "directory", ""
+		}
+		return "file", fileRole
+	}
+}
+
+func pathContainsSegment(parts []string, target string) bool {
+	for _, part := range parts {
+		if part == target {
+			return true
+		}
+	}
+	return false
+}
+
+func projectionParentPath(relPath string) *string {
+	if relPath == "" || relPath == rootProjectionPath {
+		return nil
+	}
+	parent := filepath.ToSlash(filepath.Dir(relPath))
+	if parent == "." || parent == "" {
+		root := rootProjectionPath
+		return &root
+	}
+	return &parent
+}
+
+func inferredResourceSlug(logicalType string, scope Scope) string {
+	switch logicalType {
+	case "department":
+		return scope.DepartmentSlug
+	case "team":
+		return scope.TeamSlug
+	case "project":
+		return scope.ProjectSlug
+	case "personal":
+		return scope.PersonalSlug
+	default:
+		return ""
+	}
+}
+
+func parentEntityName(logicalType string, scope Scope) string {
+	switch logicalType {
+	case "department":
+		return scope.DepartmentSlug
+	case "team":
+		return scope.TeamSlug
+	case "project":
+		return scope.ProjectSlug
+	case "personal":
+		return scope.PersonalSlug
+	default:
+		return ""
+	}
+}
+
+func stringValue(value any) string {
+	stringValue, _ := value.(string)
+	return strings.TrimSpace(stringValue)
+}
+
+func firstNonEmpty(values ...string) string {
+	for _, value := range values {
+		trimmed := strings.TrimSpace(value)
+		if trimmed != "" {
+			return trimmed
+		}
+	}
+	return ""
+}
+
+func summarizeNodes(nodes []Node) RebuildSummary {
+	summary := RebuildSummary{TotalNodes: len(nodes)}
+	for _, node := range nodes {
+		switch node.NodeKind {
+		case NodeKindDirectory:
+			summary.DirectoryCount++
+		case NodeKindFile:
+			summary.FileCount++
+		}
+	}
+	return summary
+}
+
+func errorsIsNotExist(err error) bool {
+	return err != nil && os.IsNotExist(err)
+}

Backend/internal/posixproj/projector_test.go

@@ -0,0 +1,232 @@
+package posixproj
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
+	root := filepath.Join(t.TempDir(), "POSIX")
+
+	mustMkdirAll(t, filepath.Join(root, "catalog", "packs"))
+	mustMkdirAll(t, filepath.Join(root, "catalog", "standalone"))
+	mustMkdirAll(t, filepath.Join(root, "departments", "department-primary-department", "teams", "team-primary-team"))
+	mustMkdirAll(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", "children"))
+	mustMkdirAll(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", "tree"))
+	mustMkdirAll(t, filepath.Join(root, "projects", "project-primary-project", "tree"))
+	mustMkdirAll(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "children"))
+	mustMkdirAll(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap"))
+	mustMkdirAll(t, filepath.Join(root, "users", "personals"))
+
+	mustWriteJSON(t, filepath.Join(root, "settings.json"), map[string]any{
+		"installation": map[string]any{
+			"id":             "installation-1",
+			"name":           "MangoPig",
+			"isBootstrapped": true,
+		},
+		"organization": map[string]any{
+			"id":   "org-1",
+			"name": "Primary Organization",
+			"slug": "primary-organization",
+		},
+	})
+	mustWriteJSON(t, filepath.Join(root, "layout.json"), map[string]any{
+		"type": "tenant-layout",
+		"home": map[string]any{"defaultProjectSlug": "primary-project"},
+	})
+	mustWriteJSON(t, filepath.Join(root, "departments", "department-primary-department", "settings.json"), map[string]any{
+		"id":   "dept-1",
+		"name": "Primary Department",
+		"slug": "primary-department",
+		"type": "department",
+	})
+	mustWriteJSON(t, filepath.Join(root, "departments", "department-primary-department", "users.json"), map[string]any{
+		"users": []map[string]any{{"id": "admin-1"}},
+	})
+	mustWriteJSON(t, filepath.Join(root, "departments", "department-primary-department", "teams", "team-primary-team", "settings.json"), map[string]any{
+		"id":   "team-1",
+		"name": "Primary Team",
+		"slug": "primary-team",
+		"type": "team",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "settings.json"), map[string]any{
+		"id":   "project-1",
+		"name": "Primary Project",
+		"slug": "primary-project",
+		"type": "project",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "home.json"), map[string]any{
+		"type":    "project-home",
+		"project": "primary-project",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "acl.json"), map[string]any{
+		"inherits": true,
+		"rules":    []any{},
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "folder.json"), map[string]any{
+		"name": "Design",
+		"slug": "design",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "acl.json"), map[string]any{
+		"inherits": true,
+		"rules":    []any{},
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", "settings.json"), map[string]any{
+		"id":   "project-2",
+		"name": "Web Project",
+		"slug": "web",
+		"type": "project",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", "home.json"), map[string]any{
+		"type":    "project-home",
+		"project": "web",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", "acl.json"), map[string]any{
+		"inherits": true,
+		"rules":    []any{},
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "folder.json"), map[string]any{
+		"name": "Docs",
+		"slug": "docs",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", "item.json"), map[string]any{
+		"id":   "item-1",
+		"name": "Roadmap",
+		"slug": "roadmap",
+		"type": "board",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", "schema.json"), map[string]any{
+		"type": "object",
+	})
+	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", "data.json"), map[string]any{
+		"title": "Roadmap",
+	})
+	mustWriteJSON(t, filepath.Join(root, "users", "settings.json"), map[string]any{
+		"primaryAdminId": "admin-1",
+	})
+	mustWriteJSON(t, filepath.Join(root, "users", "data.json"), map[string]any{
+		"users": []map[string]any{{"id": "admin-1", "email": "ronald@example.com"}},
+	})
+
+	nodes, err := ScanRoot(root)
+	if err != nil {
+		t.Fatalf("ScanRoot() error = %v", err)
+	}
+
+	index := make(map[string]Node, len(nodes))
+	for _, node := range nodes {
+		index[node.Path] = node
+	}
+
+	rootNode, ok := index[rootProjectionPath]
+	if !ok {
+		t.Fatalf("expected synthetic root node")
+	}
+	if rootNode.LogicalType != "tenant_root" {
+		t.Fatalf("expected root logical type tenant_root, got %q", rootNode.LogicalType)
+	}
+	if rootNode.OrganizationSlug != "primary-organization" {
+		t.Fatalf("expected root organization slug primary-organization, got %q", rootNode.OrganizationSlug)
+	}
+
+	tenantSettings := index["settings.json"]
+	if tenantSettings.LogicalType != "tenant" || tenantSettings.FileRole != "settings" {
+		t.Fatalf("unexpected tenant settings classification: %#v", tenantSettings)
+	}
+	if tenantSettings.InstallationID != "installation-1" {
+		t.Fatalf("expected installation id installation-1, got %q", tenantSettings.InstallationID)
+	}
+
+	deptSettings := index["departments/department-primary-department/settings.json"]
+	if deptSettings.DepartmentSlug != "primary-department" {
+		t.Fatalf("expected department slug primary-department, got %q", deptSettings.DepartmentSlug)
+	}
+	if deptSettings.ResourceID != "dept-1" {
+		t.Fatalf("expected department resource id dept-1, got %q", deptSettings.ResourceID)
+	}
+
+	teamSettings := index["departments/department-primary-department/teams/team-primary-team/settings.json"]
+	if teamSettings.TeamSlug != "primary-team" {
+		t.Fatalf("expected team slug primary-team, got %q", teamSettings.TeamSlug)
+	}
+
+	projectSettings := index["projects/project-primary-project/settings.json"]
+	if projectSettings.ProjectSlug != "primary-project" {
+		t.Fatalf("expected project slug primary-project, got %q", projectSettings.ProjectSlug)
+	}
+	if projectSettings.ResourceName != "Primary Project" {
+		t.Fatalf("expected project resource name Primary Project, got %q", projectSettings.ResourceName)
+	}
+
+	projectTree := index["projects/project-primary-project/tree"]
+	if projectTree.LogicalType != "project_tree" || projectTree.NodeKind != NodeKindDirectory {
+		t.Fatalf("unexpected project tree node: %#v", projectTree)
+	}
+
+	projectChildren := index["projects/project-primary-project/children"]
+	if projectChildren.LogicalType != "project_children" || projectChildren.NodeKind != NodeKindDirectory {
+		t.Fatalf("unexpected project children node: %#v", projectChildren)
+	}
+
+	hierarchyFolder := index["projects/project-primary-project/children/folder-design"]
+	if hierarchyFolder.LogicalType != "hierarchy_folder" || hierarchyFolder.ProjectSlug != "primary-project" {
+		t.Fatalf("unexpected hierarchy folder node: %#v", hierarchyFolder)
+	}
+
+	hierarchyFolderACL := index["projects/project-primary-project/children/folder-design/acl.json"]
+	if hierarchyFolderACL.LogicalType != "hierarchy_folder" || hierarchyFolderACL.FileRole != "acl" {
+		t.Fatalf("unexpected hierarchy folder acl classification: %#v", hierarchyFolderACL)
+	}
+
+	childProjectSettings := index["projects/project-primary-project/children/folder-design/children/project-web/settings.json"]
+	if childProjectSettings.LogicalType != "project" || childProjectSettings.ProjectSlug != "web" {
+		t.Fatalf("unexpected child project classification: %#v", childProjectSettings)
+	}
+
+	treeFolder := index["projects/project-primary-project/tree/folder-docs"]
+	if treeFolder.LogicalType != "hierarchy_folder" || treeFolder.ProjectSlug != "primary-project" {
+		t.Fatalf("unexpected tree folder node: %#v", treeFolder)
+	}
+
+	treeFolderACL := index["projects/project-primary-project/tree/folder-docs/folder.json"]
+	if treeFolderACL.LogicalType != "hierarchy_folder" || treeFolderACL.FileRole != "folder" {
+		t.Fatalf("unexpected tree folder file classification: %#v", treeFolderACL)
+	}
+
+	treeItem := index["projects/project-primary-project/tree/folder-docs/item-roadmap/item.json"]
+	if treeItem.LogicalType != "item" || treeItem.FileRole != "item" {
+		t.Fatalf("unexpected tree item classification: %#v", treeItem)
+	}
+	if treeItem.ResourceSlug != "roadmap" {
+		t.Fatalf("expected tree item resource slug roadmap, got %#v", treeItem.ResourceSlug)
+	}
+
+	usersData := index["users/data.json"]
+	if usersData.LogicalType != "users" || usersData.FileRole != "data" {
+		t.Fatalf("unexpected users data classification: %#v", usersData)
+	}
+	if usersData.Checksum == "" || usersData.SizeBytes == 0 {
+		t.Fatalf("expected users/data.json checksum and size to be populated: %#v", usersData)
+	}
+}
+
+func mustMkdirAll(t *testing.T, path string) {
+	t.Helper()
+	if err := os.MkdirAll(path, 0o755); err != nil {
+		t.Fatalf("MkdirAll(%q) error = %v", path, err)
+	}
+}
+
+func mustWriteJSON(t *testing.T, path string, payload any) {
+	t.Helper()
+	bytes, err := json.MarshalIndent(payload, "", "  ")
+	if err != nil {
+		t.Fatalf("MarshalIndent(%q) error = %v", path, err)
+	}
+	bytes = append(bytes, '\n')
+	if err := os.WriteFile(path, bytes, 0o644); err != nil {
+		t.Fatalf("WriteFile(%q) error = %v", path, err)
+	}
+}

Backend/internal/worker/runner.go

@@ -0,0 +1,124 @@
+package worker
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"strings"
+	"time"
+
+	"moku-backend/internal/jobs"
+)
+
+type JobStore interface {
+	ClaimNext(ctx context.Context) (*jobs.Job, error)
+	MarkSucceeded(ctx context.Context, jobID string) error
+	MarkFailed(ctx context.Context, jobID, failure string) error
+}
+
+type Handler func(ctx context.Context, job jobs.Job) error
+
+type Runner struct {
+	store        JobStore
+	logger       *slog.Logger
+	pollInterval time.Duration
+	handlers     map[string]Handler
+}
+
+func NewRunner(store JobStore, logger *slog.Logger, pollInterval time.Duration) *Runner {
+	interval := pollInterval
+	if interval <= 0 {
+		interval = time.Second
+	}
+
+	return &Runner{
+		store:        store,
+		logger:       logger,
+		pollInterval: interval,
+		handlers:     make(map[string]Handler),
+	}
+}
+
+func (runner *Runner) Register(kind string, handler Handler) {
+	runner.handlers[strings.TrimSpace(kind)] = handler
+}
+
+func (runner *Runner) Run(ctx context.Context) error {
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		default:
+		}
+
+		job, err := runner.store.ClaimNext(ctx)
+		if err != nil {
+			if ctx.Err() != nil {
+				return nil
+			}
+
+			runner.logger.Error("worker claim failed", "error", err)
+
+			if err := waitForNextPoll(ctx, runner.pollInterval); err != nil {
+				return nil
+			}
+
+			continue
+		}
+
+		if job == nil {
+			if err := waitForNextPoll(ctx, runner.pollInterval); err != nil {
+				return nil
+			}
+
+			continue
+		}
+
+		handler, ok := runner.handlers[job.Kind]
+		if !ok {
+			failure := fmt.Sprintf("no handler registered for job kind %q", job.Kind)
+			if err := runner.store.MarkFailed(ctx, job.ID, failure); err != nil {
+				return err
+			}
+
+			runner.logger.Error("worker job failed", "jobID", job.ID, "kind", job.Kind, "error", failure)
+			continue
+		}
+
+		if err := handler(ctx, *job); err != nil {
+			if ctx.Err() != nil {
+				return nil
+			}
+
+			failure := strings.TrimSpace(err.Error())
+			if failure == "" {
+				failure = "job handler returned an empty error"
+			}
+
+			if markErr := runner.store.MarkFailed(ctx, job.ID, failure); markErr != nil {
+				return markErr
+			}
+
+			runner.logger.Error("worker job failed", "jobID", job.ID, "kind", job.Kind, "error", failure)
+			continue
+		}
+
+		if err := runner.store.MarkSucceeded(ctx, job.ID); err != nil {
+			return err
+		}
+
+		runner.logger.Info("worker job succeeded", "jobID", job.ID, "kind", job.Kind)
+	}
+}
+
+func waitForNextPoll(ctx context.Context, interval time.Duration) error {
+	timer := time.NewTimer(interval)
+	defer timer.Stop()
+
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-timer.C:
+		return nil
+	}
+}

Backend/internal/worker/runner_test.go

@@ -0,0 +1,209 @@
+package worker
+
+import (
+	"context"
+	"errors"
+	"io"
+	"log/slog"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"moku-backend/internal/jobs"
+)
+
+func TestRunnerProcessesRegisteredJob(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	store := &fakeJobStore{
+		job: &jobs.Job{
+			ID:      "job-1",
+			Kind:    jobs.KindBootstrapStructureMaterialize,
+			Payload: []byte(`{"installationId":"installation-1"}`),
+		},
+		cancel: cancel,
+	}
+	runner := NewRunner(store, slog.New(slog.NewTextHandler(io.Discard, nil)), 0)
+
+	handlerCalled := false
+	runner.Register(jobs.KindBootstrapStructureMaterialize, func(ctx context.Context, job jobs.Job) error {
+		handlerCalled = true
+		if job.ID != "job-1" {
+			t.Fatalf("expected job id job-1, got %s", job.ID)
+		}
+		return nil
+	})
+
+	if err := runner.Run(ctx); err != nil {
+		t.Fatalf("runner returned error: %v", err)
+	}
+
+	if !handlerCalled {
+		t.Fatal("expected handler to be called")
+	}
+	if len(store.succeeded) != 1 || store.succeeded[0] != "job-1" {
+		t.Fatalf("expected job to be marked succeeded once, got %#v", store.succeeded)
+	}
+	if len(store.failed) != 0 {
+		t.Fatalf("expected no failed jobs, got %#v", store.failed)
+	}
+}
+
+func TestRunnerMarksFailedWhenHandlerErrors(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	store := &fakeJobStore{
+		job: &jobs.Job{
+			ID:   "job-2",
+			Kind: jobs.KindBootstrapStructureMaterialize,
+		},
+		cancel: cancel,
+	}
+	runner := NewRunner(store, slog.New(slog.NewTextHandler(io.Discard, nil)), 0)
+	runner.Register(jobs.KindBootstrapStructureMaterialize, func(ctx context.Context, job jobs.Job) error {
+		return errors.New("boom")
+	})
+
+	if err := runner.Run(ctx); err != nil {
+		t.Fatalf("runner returned error: %v", err)
+	}
+
+	if len(store.succeeded) != 0 {
+		t.Fatalf("expected no succeeded jobs, got %#v", store.succeeded)
+	}
+	if len(store.failed) != 1 {
+		t.Fatalf("expected one failed job, got %#v", store.failed)
+	}
+	if store.failed[0].jobID != "job-2" {
+		t.Fatalf("expected failed job id job-2, got %#v", store.failed[0])
+	}
+	if !strings.Contains(store.failed[0].failure, "boom") {
+		t.Fatalf("expected failure to mention handler error, got %#v", store.failed[0])
+	}
+}
+
+func TestRunnerMarksFailedWhenHandlerMissing(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	store := &fakeJobStore{
+		job: &jobs.Job{
+			ID:   "job-3",
+			Kind: "unknown.kind",
+		},
+		cancel: cancel,
+	}
+	runner := NewRunner(store, slog.New(slog.NewTextHandler(io.Discard, nil)), 0)
+
+	if err := runner.Run(ctx); err != nil {
+		t.Fatalf("runner returned error: %v", err)
+	}
+
+	if len(store.failed) != 1 {
+		t.Fatalf("expected one failed job, got %#v", store.failed)
+	}
+	if !strings.Contains(store.failed[0].failure, "no handler registered") {
+		t.Fatalf("expected missing handler failure, got %#v", store.failed[0])
+	}
+}
+
+func TestRunnerRetriesClaimErrors(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	store := &fakeJobStore{
+		claimErrors: []error{errors.New("relation \"background_jobs\" does not exist")},
+		job: &jobs.Job{
+			ID:   "job-4",
+			Kind: jobs.KindBootstrapStructureMaterialize,
+		},
+		cancel: cancel,
+	}
+	runner := NewRunner(store, slog.New(slog.NewTextHandler(io.Discard, nil)), time.Millisecond)
+
+	handlerCalled := false
+	runner.Register(jobs.KindBootstrapStructureMaterialize, func(ctx context.Context, job jobs.Job) error {
+		handlerCalled = true
+		return nil
+	})
+
+	if err := runner.Run(ctx); err != nil {
+		t.Fatalf("runner returned error: %v", err)
+	}
+
+	if !handlerCalled {
+		t.Fatal("expected handler to be called after claim retry")
+	}
+	if store.claimAttempts < 2 {
+		t.Fatalf("expected at least two claim attempts, got %d", store.claimAttempts)
+	}
+	if len(store.succeeded) != 1 || store.succeeded[0] != "job-4" {
+		t.Fatalf("expected job to be marked succeeded once, got %#v", store.succeeded)
+	}
+	if len(store.failed) != 0 {
+		t.Fatalf("expected no failed jobs, got %#v", store.failed)
+	}
+}
+
+type fakeJobStore struct {
+	mu            sync.Mutex
+	job           *jobs.Job
+	claimed       bool
+	claimErrors   []error
+	claimAttempts int
+	succeeded     []string
+	failed        []fakeFailure
+	cancel        context.CancelFunc
+}
+
+type fakeFailure struct {
+	jobID   string
+	failure string
+}
+
+func (store *fakeJobStore) ClaimNext(ctx context.Context) (*jobs.Job, error) {
+	store.mu.Lock()
+	defer store.mu.Unlock()
+	store.claimAttempts++
+
+	if len(store.claimErrors) > 0 {
+		err := store.claimErrors[0]
+		store.claimErrors = store.claimErrors[1:]
+		return nil, err
+	}
+
+	if store.claimed || store.job == nil {
+		return nil, nil
+	}
+
+	store.claimed = true
+	job := *store.job
+	return &job, nil
+}
+
+func (store *fakeJobStore) MarkSucceeded(ctx context.Context, jobID string) error {
+	store.mu.Lock()
+	store.succeeded = append(store.succeeded, jobID)
+	store.mu.Unlock()
+
+	if store.cancel != nil {
+		store.cancel()
+	}
+
+	return nil
+}
+
+func (store *fakeJobStore) MarkFailed(ctx context.Context, jobID, failure string) error {
+	store.mu.Lock()
+	store.failed = append(store.failed, fakeFailure{jobID: jobID, failure: failure})
+	store.mu.Unlock()
+
+	if store.cancel != nil {
+		store.cancel()
+	}
+
+	return nil
+}

Commands/Local/Dev/backend.just

@@ -9,18 +9,22 @@ migrate-up:
 migrate-down:
 	cd '{{backend_dir}}' && go run ./cmd/migrate down
 
-# Reset all embedded database migrations and reapply from scratch.
+# Reset all embedded database migrations.
 migrate-reset:
 	cd '{{backend_dir}}' && go run ./cmd/migrate reset
 
+# Reset embedded database migrations and apply them again from scratch.
+migrate-rebuild:
+	cd '{{backend_dir}}' && go run ./cmd/migrate reset && go run ./cmd/migrate up
+
 # Show the embedded database migration status.
 migrate-status:
 	cd '{{backend_dir}}' && go run ./cmd/migrate status
 
+# Rebuild the POSIX-to-DB projection from the current POSIX root.
+posix-rebuild:
+	cd '{{backend_dir}}' && go run ./cmd/posix rebuild
+
 # Format backend Go source files.
 fmt:
 	cd '{{backend_dir}}' && gofmt -w ./cmd ./db ./internal
-
-# Run backend test suite.
-test:
-	cd '{{backend_dir}}' && go test ./...

Commands/Test/backend.just

@@ -0,0 +1,11 @@
+project_root := justfile_directory()
+backend_dir := project_root + "/Backend"
+
+# Run the full backend test suite.
+[default]
+all:
+	cd '{{backend_dir}}' && go test ./...
+
+# Run the isolated POSIX bootstrap smoke test.
+posix-bootstrap:
+	cd '{{backend_dir}}' && go test ./internal/bootstrap -run TestEnsureBootstrapPOSIXSkeletonInitializesEmptyRoot -count=1 -v

Commands/Test/mod.just

@@ -0,0 +1 @@
+mod backend

Docker/docker-compose.local.dev.yaml

@@ -6,6 +6,7 @@ x-backend-service: &backend-service
   environment:
     DATABASE_URL: postgres://moku:moku_dev_password@postgres:5432/moku?sslmode=disable
     VALKEY_URL: redis://valkey:6379/0
+    POSIX_ROOT: /posix
   depends_on:
     postgres:
       condition: service_healthy
@@ -13,6 +14,7 @@ x-backend-service: &backend-service
       condition: service_healthy
   volumes:
     - ../Backend:/app
+    - ../POSIX:/posix
     - moku_work_backend_go_pkg:/go/pkg/mod
     - moku_work_backend_go_build:/root/.cache/go-build
 

Docker/docker-compose.local.prod.yaml

@@ -5,11 +5,14 @@ x-backend-service: &backend-service
   environment:
     DATABASE_URL: postgres://moku:moku_dev_password@postgres:5432/moku?sslmode=disable
     VALKEY_URL: redis://valkey:6379/0
+    POSIX_ROOT: /posix
   depends_on:
     postgres:
       condition: service_healthy
     valkey:
       condition: service_healthy
+  volumes:
+    - ../POSIX:/posix
 
 services:
   postgres:

Documentation/POSIX-Structure.md

@@ -0,0 +1,75 @@
+# POSIX Structure
+
+[Filetree Link](https://tree.nathanfriend.com/?s=(%27optiUs!(%27fancy!Yue~fullPath!fbq~YailingSlash!Yue~rootDot!fbq)~R(%27R%27PJ%20or%20OrganizatiU%20%7Bqrver%7DM*46layout6cNlog7packs7*pack37A2*enYies75W5A_standbUe7WA6HwH30LZ2teamw5teamGL5Z6FwF30LKTC058T5C7XFG5LXKXTXC7XI7I05QG5BN2*8QG5BN6Z04_dN_pJw*pJGlayout2L*KI70%27)~vEiU!%271%27)*%20%200M52_*3-%3Cslug%3E4qttings5**69M*7%2F08VG*V259.jsUA5manifestBQ25*schema25*dCchildrenEersFprojectG305HdepartmentI*YeeJEUbKhome2L*42M%5CnNataQitemRsource!Tacl2UonVfolderW*app37X55YtrZusE_90balqsews0%01wqb_ZYXWVUTRQNMLKJIHGFECBA987654320*)
+
+``` markdown
+Personal or Organization (server)/
+├── settings.json
+├── layout.json
+├── catalog/
+│   ├── packs/
+│   │   └── pack-<slug>/
+│   │       ├── manifest.json
+│   │       └── entries/
+│   │           └── app-<slug>/
+│   │               └── manifest.json
+│   └── standalone/
+│       └── app-<slug>/
+│           └── manifest.json
+├── departments/
+│   └── department-<slug>/
+│       ├── settings.json
+│       ├── users.json
+│       └── teams/
+│           └── team-<slug>/
+│               ├── settings.json
+│               └── users.json
+├── projects/
+│   └── project-<slug>/
+│       ├── settings.json
+│       ├── home.json
+│       ├── acl.json
+│       ├── children/
+│       │   └── folder-<slug>/
+│       │       ├── folder.json
+│       │       ├── acl.json
+│       │       └── children/
+│       │           └── project-<slug>/
+│       │               ├── settings.json
+│       │               ├── home.json
+│       │               ├── acl.json
+│       │               ├── children/
+│       │               └── tree/
+│       └── tree/
+│           ├── item-<slug>/
+│           │   ├── item.json
+│           │   ├── schema.json
+│           │   └── data.json
+│           └── folder-<slug>/
+│               ├── folder.json
+│               └── item-<slug>/
+│                   ├── item.json
+│                   ├── schema.json
+│                   └── data.json
+└── users/
+    ├── settings.json
+    ├── data.json
+    └── personals/
+        └── personal-<slug>/
+            ├── layout.json
+            ├── settings.json
+            ├── home.json
+            └── tree/
+```
+
+## File Responsibilities
+
+- `settings.json` — Metadata and presentation config for the thing, such as display name, icon, description, and simple settings.
+- `layout.json` — Layout configuration for the current server or personal space.
+- `home.json` — Home surface configuration, such as widgets, sections, and how they are arranged.
+- `folder.json` — Metadata for a folder node in a tree.
+- `item.json` — Instance metadata for a created item, including what it is and how it should behave.
+- `schema.json` — The structure expected by that item's data.
+- `data.json` — The actual content or state data for that item.
+- `manifest.json` — Catalog definition metadata, including versioning, description, and capabilities for reusable apps or entries.
+- `users.json` — User membership or assignment data for departments and teams.

Documentation/TODO.md

@@ -137,7 +137,7 @@
 
 ### Version 0.4.0
 
-**Goal:** Introduce the POSIX-based file system drive direction with OnlyOffice + S3 blob storage
+**Goal:** Introduce the POSIX-based file system drive direction with OnlyOffice + S3 blob storage + Per File Versioning
 
 ### Version 0.5.0
 

Env/.env.example

@@ -10,6 +10,7 @@ BACKEND_SHUTDOWN_TIMEOUT=10s
 
 DATABASE_URL=postgres://moku:moku_dev_password@localhost:5432/moku?sslmode=disable
 VALKEY_URL=redis://localhost:6379/0
+POSIX_ROOT=../POSIX
 
 VITE_API_BASE_URL=/v1
 

Frontend/src/app.tsx

@@ -1,7 +1,7 @@
 // Path: Frontend/src/app.tsx
 
 import type { JSX } from "solid-js";
-import { AppShell } from "./components/shell/AppShell/AppShell";
+import { AppShell } from "./components/app-shell/AppShell/AppShell";
 import "./styles/main.scss";
 import "./styles/user-overrides.scss";
 

Frontend/src/components/app-shell/AppShell/AppShell.tsx

@@ -1,17 +1,19 @@
-// Path: Frontend/src/components/shell/AppShell/AppShell.tsx
+// Path: Frontend/src/components/app-shell/AppShell/AppShell.tsx
 
 import { createSignal, onCleanup, onMount, Show, type JSX } from "solid-js";
-import { getDocumentTheme, setTheme, type Theme } from "../../../theme/runtime";
-import { WorkspaceHome } from "../../workspace-home/WorkspaceHome/WorkspaceHome";
+import { getDocumentTheme, setTheme, type Theme } from "../../../helper/themeRuntime";
+import { BootstrapWizard } from "../../bootstrap/BootstrapWizard/BootstrapWizard";
+import { WorkspaceHome } from "../../workspace-home/WorkspaceHome";
 import { AppShellDataProvider, useAppShellData } from "../data/app-shell.context";
-import { LeftRail } from "../LeftRail/LeftRail";
+import { LeftRail } from "../../workspace-navigation/LeftRail/LeftRail";
 import { MobileBottomNav } from "../MobileBottomNav/MobileBottomNav";
-import { MobileWorkspaceBrowser } from "../MobileWorkspaceBrowser/MobileWorkspaceBrowser";
+import { MobileWorkspaceBrowser } from "../../workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser";
 import { ServerDock } from "../ServerDock/ServerDock";
-import { NotificationsMenu } from "../TopBar/NotificationsMenu";
-import { ProfileMenu } from "../TopBar/ProfileMenu";
-import { TopBar } from "../TopBar/TopBar";
-import { WorkspaceSidebar } from "../WorkspaceSidebar/WorkspaceSidebar";
+import { NotificationsMenu } from "../../top-bar/TopBar/NotificationsMenu";
+import { ProfileMenu } from "../../top-bar/TopBar/ProfileMenu";
+import { TopBar } from "../../top-bar/TopBar/TopBar";
+import { WorkspaceTopBar } from "../../workspace-navigation/WorkspaceTopBar/WorkspaceTopBar";
+import { WorkspaceSidebar } from "../../workspace-navigation/WorkspaceSidebar/WorkspaceSidebar";
 import styles from "./AppShell.module.scss";
 
 type MobileWorkspaceView = "notifications" | "profile" | null;
@@ -80,6 +82,8 @@ const AppShellContent = (): JSX.Element => {
 		setActiveMobileWorkspaceView(null);
 	};
 
+	const workspaceBreadcrumb = (): string => `${appShellData.activeServer().name} / ${appShellData.activeProject().name} / Home`;
+
 	return (
 		<div class={styles.shell} data-ui="app-shell" data-app-shell-status={appShellData.status()}>
 			<TopBar
@@ -124,12 +128,16 @@ const AppShellContent = (): JSX.Element => {
 						<Show
 							when={isMobileViewport() && activeMobileWorkspaceView() !== null}
 							fallback={
-								<WorkspaceHome
-									sidebarCollapsed={isSidebarCollapsed()}
-									onToggleSidebarCollapse={(): void => {
-										setIsSidebarCollapsed((collapsed) => !collapsed);
-									}}
-								/>
+								<>
+									<WorkspaceTopBar
+										sidebarCollapsed={isSidebarCollapsed()}
+										breadcrumb={workspaceBreadcrumb()}
+										onToggleSidebarCollapse={(): void => {
+											setIsSidebarCollapsed((collapsed) => !collapsed);
+										}}
+									/>
+									<WorkspaceHome />
+								</>
 							}
 						>
 							<div class={styles.mobileWorkspaceView} data-slot="mobile-workspace-view" data-view={activeMobileWorkspaceView() ?? undefined}>
@@ -162,6 +170,7 @@ const AppShellContent = (): JSX.Element => {
 					setIsMobileWorkspaceBrowserOpen(false);
 				}}
 			/>
+			<BootstrapWizard />
 		</div>
 	);
 };

Frontend/src/components/app-shell/MobileBottomNav/MobileBottomNav.tsx

@@ -1,4 +1,4 @@
-// Path: Frontend/src/components/shell/MobileBottomNav/MobileBottomNav.tsx
+// Path: Frontend/src/components/app-shell/MobileBottomNav/MobileBottomNav.tsx
 
 import { For, type JSX } from "solid-js";
 import { useAppShellData } from "../data/app-shell.context";

Frontend/src/components/app-shell/ServerDock/ServerDock.tsx

@@ -1,4 +1,4 @@
-// Path: Frontend/src/components/shell/ServerDock/ServerDock.tsx
+// Path: Frontend/src/components/app-shell/ServerDock/ServerDock.tsx
 
 import { For, Show, type JSX } from "solid-js";
 import { useAppShellData } from "../data/app-shell.context";

Frontend/src/components/app-shell/data/app-shell.builders.ts

@@ -0,0 +1,169 @@
+// Path: Frontend/src/components/app-shell/data/app-shell.builders.ts
+
+import {
+	activeDepartment as fallbackActiveDepartment,
+	activeProject as fallbackActiveProject,
+	activeServer as fallbackActiveServer,
+	activeUserProfile as fallbackActiveUserProfile,
+	departmentItems as fallbackDepartmentItems,
+	organizationAdminDockActions,
+	personalDockActions,
+	projectItems as fallbackProjectItems,
+	railItems as fallbackRailItems,
+	workspaceTree as fallbackWorkspaceTree,
+	type ActiveDepartment,
+	type ActiveProject,
+	type ActiveServer,
+	type ActiveUserProfile,
+	type DepartmentItem,
+	type ProjectItem,
+	type RailItem,
+	type WorkspaceTreeNode,
+} from "./shell.data";
+import type { AppShellPayload } from "./app-shell.types";
+
+const buildAbbreviation = (name: string, fallback: string): string => {
+	const parts = name
+		.trim()
+		.split(/\s+/)
+		.filter(Boolean);
+
+	if (parts.length === 0) {
+		return fallback;
+	}
+
+	const abbreviation = parts
+		.slice(0, 2)
+		.map((part) => part[0]?.toUpperCase() ?? "")
+		.join("");
+
+	return abbreviation || fallback;
+};
+
+export const buildRailItems = (payload: AppShellPayload | null): readonly RailItem[] => {
+	if (!payload?.installation || payload.organizations.length === 0) {
+		return fallbackRailItems;
+	}
+
+	const kind = payload.installation.mode === "personal" ? "personal" : "organization";
+	const serverName = payload.installation.name || payload.organizations[0]?.name || payload.installation.host;
+
+	return payload.organizations.map((organization, index) => ({
+		id: organization.id,
+		label: serverName || organization.name,
+		abbreviation: buildAbbreviation(serverName || organization.name, kind === "personal" ? "P" : "O"),
+		kind,
+		active: index === 0,
+	}));
+};
+
+export const buildActiveServer = (payload: AppShellPayload | null): ActiveServer => {
+	const installation = payload?.installation;
+	const organization = payload?.organizations[0];
+
+	if (!installation || !organization) {
+		return fallbackActiveServer;
+	}
+
+	const kind = installation.mode === "personal" ? "personal" : "organization";
+	const serverName = installation.name || organization.name || installation.host;
+
+	return {
+		id: installation.id,
+		name: serverName || fallbackActiveServer.name,
+		abbreviation: buildAbbreviation(serverName, kind === "personal" ? "P" : "O"),
+		kind,
+		connectedLabel: kind === "organization" ? `${payload?.teams.length ?? 0} connected` : undefined,
+		subtitle: kind === "personal" ? installation.host || payload?.admin?.homeTitle || "Personal home" : undefined,
+		dockActions: kind === "personal" ? personalDockActions : organizationAdminDockActions,
+	};
+};
+
+export const buildProjectItems = (payload: AppShellPayload | null): readonly ProjectItem[] => {
+	if (!payload?.projects.length) {
+		return fallbackProjectItems;
+	}
+
+	return payload.projects.map((project, index) => ({
+		id: project.id,
+		name: project.name,
+		description: project.slug || "Persisted project workspace",
+		groupLabel: payload.departments.find((department) => department.id === project.departmentId)?.name || "Projects",
+		parentLabel:
+			payload.teams.find((team) => team.id === project.teamId)?.name ||
+			payload.departments.find((department) => department.id === project.departmentId)?.name ||
+			"Shared project",
+		meta: (() => {
+			const workspaceCount = payload.workspaces.filter((workspace) => workspace.projectId === project.id).length;
+
+			return workspaceCount > 0 ? `${workspaceCount} workspace${workspaceCount === 1 ? "" : "s"}` : undefined;
+		})(),
+		active: index === 0,
+	}));
+};
+
+export const buildActiveProject = (payload: AppShellPayload | null): ActiveProject => {
+	const firstProject = payload?.projects[0];
+
+	if (!firstProject) {
+		return fallbackActiveProject;
+	}
+
+	return {
+		id: firstProject.id,
+		name: firstProject.name,
+	};
+};
+
+export const buildDepartmentItems = (payload: AppShellPayload | null): readonly DepartmentItem[] => {
+	if (!payload?.departments.length) {
+		return fallbackDepartmentItems;
+	}
+
+	return payload.departments.map((department, index) => ({
+		id: department.id,
+		name: department.name,
+		teams: payload.teams.filter((team) => team.departmentId === department.id).map((team) => team.name),
+		active: index === 0,
+	}));
+};
+
+export const buildActiveDepartment = (payload: AppShellPayload | null): ActiveDepartment => {
+	const firstDepartment = payload?.departments[0];
+
+	if (!firstDepartment) {
+		return fallbackActiveDepartment;
+	}
+
+	const firstTeamName = payload?.teams.find((team) => team.departmentId === firstDepartment.id)?.name ?? "";
+
+	return {
+		id: firstDepartment.id,
+		name: firstDepartment.name,
+		teamName: firstTeamName,
+	};
+};
+
+export const buildWorkspaceTree = (payload: AppShellPayload | null): readonly WorkspaceTreeNode[] => {
+	if (!payload?.projects.length) {
+		return fallbackWorkspaceTree;
+	}
+
+	return [];
+};
+
+export const buildActiveUserProfile = (payload: AppShellPayload | null): ActiveUserProfile => {
+	if (!payload?.admin) {
+		return fallbackActiveUserProfile;
+	}
+
+	const organizationName = payload.installation?.name || payload.organizations[0]?.name || fallbackActiveServer.name;
+	const departmentName = payload.departments[0]?.name;
+
+	return {
+		name: payload.admin.displayName,
+		email: payload.admin.email,
+		roleLabel: payload.admin.isInstanceAdmin ? "Instance admin" : "Member",
+		contextLabel: departmentName ? `${organizationName} • ${departmentName}` : organizationName,
+	};
+};

Frontend/src/components/app-shell/data/app-shell.context.tsx

@@ -0,0 +1,97 @@
+// Path: Frontend/src/components/app-shell/data/app-shell.context.tsx
+
+import {
+	createContext,
+	createMemo,
+	createSignal,
+	onMount,
+	useContext,
+	type JSX,
+} from "solid-js";
+import { resolveAPIBase } from "../../../lib/api";
+import {
+	buildActiveDepartment,
+	buildActiveProject,
+	buildActiveServer,
+	buildActiveUserProfile,
+	buildDepartmentItems,
+	buildProjectItems,
+	buildRailItems,
+	buildWorkspaceTree,
+} from "./app-shell.builders";
+import type { AppShellContextValue, AppShellPayload } from "./app-shell.types";
+import { normalizeAppShellPayload } from "./app-shell.types";
+
+const AppShellContext = createContext<AppShellContextValue>();
+
+export const AppShellDataProvider = (props: { children: JSX.Element }): JSX.Element => {
+	const [status, setStatus] = createSignal<"idle" | "loading" | "success" | "error">("idle");
+	const [error, setError] = createSignal("");
+	const [payload, setPayload] = createSignal<AppShellPayload | null>(null);
+
+	const load = async (): Promise<void> => {
+		setStatus("loading");
+		setError("");
+
+		try {
+			const response = await fetch(`${resolveAPIBase()}/app-shell`, {
+				headers: {
+					Accept: "application/json",
+				},
+			});
+
+			const body = (await response.json()) as {
+				data?: AppShellPayload;
+				error?: { message?: string } | string;
+				message?: string;
+			};
+			const errorMessage =
+				typeof body.message === "string"
+					? body.message
+					: typeof body.error === "string"
+						? body.error
+						: body.error?.message;
+
+			if (!response.ok || !body.data) {
+				throw new Error(errorMessage || "Failed to load app shell state.");
+			}
+
+			setPayload(normalizeAppShellPayload(body.data));
+			setStatus("success");
+		} catch (loadError) {
+			setStatus("error");
+			setError(loadError instanceof Error ? loadError.message : "Failed to load app shell state.");
+		}
+	};
+
+	onMount(() => {
+		void load();
+	});
+
+	const value: AppShellContextValue = {
+		status,
+		error,
+		installation: createMemo(() => payload()?.installation),
+		railItems: createMemo(() => buildRailItems(payload())),
+		activeServer: createMemo(() => buildActiveServer(payload())),
+		activeProject: createMemo(() => buildActiveProject(payload())),
+		activeDepartment: createMemo(() => buildActiveDepartment(payload())),
+		projectItems: createMemo(() => buildProjectItems(payload())),
+		departmentItems: createMemo(() => buildDepartmentItems(payload())),
+		workspaceTree: createMemo(() => buildWorkspaceTree(payload())),
+		activeUserProfile: createMemo(() => buildActiveUserProfile(payload())),
+		reload: load,
+	};
+
+	return <AppShellContext.Provider value={value}>{props.children}</AppShellContext.Provider>;
+};
+
+export const useAppShellData = (): AppShellContextValue => {
+	const context = useContext(AppShellContext);
+
+	if (!context) {
+		throw new Error("useAppShellData must be used within AppShellDataProvider");
+	}
+
+	return context;
+};

Frontend/src/components/app-shell/data/app-shell.types.ts

@@ -0,0 +1,130 @@
+// Path: Frontend/src/components/app-shell/data/app-shell.types.ts
+
+import type { Accessor } from "solid-js";
+import type {
+	ActiveDepartment,
+	ActiveProject,
+	ActiveServer,
+	ActiveUserProfile,
+	DepartmentItem,
+	ProjectItem,
+	RailItem,
+	WorkspaceTreeNode,
+} from "./shell.data";
+
+export type AppShellInstallation = {
+	id: string;
+	name: string;
+	mode: "personal" | "organizational" | string;
+	access: string;
+	protocol: string;
+	host: string;
+	isBootstrapped: boolean;
+	materializationStatus: "not_started" | "pending" | "running" | "succeeded" | "failed" | string;
+	materializationError?: string;
+};
+
+export type AppShellAdmin = {
+	id: string;
+	email: string;
+	displayName: string;
+	isInstanceAdmin: boolean;
+	homeTitle: string;
+};
+
+export type AppShellOrganization = {
+	id: string;
+	name: string;
+	slug: string;
+};
+
+export type AppShellDepartment = {
+	id: string;
+	organizationId: string;
+	name: string;
+	slug: string;
+};
+
+export type AppShellTeam = {
+	id: string;
+	organizationId: string;
+	departmentId?: string;
+	name: string;
+	slug: string;
+};
+
+export type AppShellProject = {
+	id: string;
+	organizationId: string;
+	departmentId?: string;
+	teamId?: string;
+	name: string;
+	slug: string;
+};
+
+export type AppShellWorkspace = {
+	id: string;
+	organizationId: string;
+	name: string;
+	slug: string;
+	kind: "organization" | "department" | "team" | "project" | string;
+	departmentId?: string;
+	teamId?: string;
+	projectId?: string;
+};
+
+export type AppShellPayload = {
+	installation?: AppShellInstallation;
+	admin?: AppShellAdmin;
+	organizations: AppShellOrganization[];
+	departments: AppShellDepartment[];
+	teams: AppShellTeam[];
+	projects: AppShellProject[];
+	workspaces: AppShellWorkspace[];
+};
+
+export type AppShellContextValue = {
+	status: Accessor<"idle" | "loading" | "success" | "error">;
+	error: Accessor<string>;
+	installation: Accessor<AppShellInstallation | undefined>;
+	railItems: Accessor<readonly RailItem[]>;
+	activeServer: Accessor<ActiveServer>;
+	activeProject: Accessor<ActiveProject>;
+	activeDepartment: Accessor<ActiveDepartment>;
+	projectItems: Accessor<readonly ProjectItem[]>;
+	departmentItems: Accessor<readonly DepartmentItem[]>;
+	workspaceTree: Accessor<readonly WorkspaceTreeNode[]>;
+	activeUserProfile: Accessor<ActiveUserProfile>;
+	reload: () => Promise<void>;
+};
+
+export const normalizeInstallation = (
+	installation: AppShellInstallation | null | undefined,
+): AppShellInstallation | undefined => {
+	if (!installation) {
+		return undefined;
+	}
+
+	const materializationStatus = installation.materializationStatus?.trim()
+		? installation.materializationStatus
+		: installation.isBootstrapped
+			? "succeeded"
+			: "not_started";
+	const materializationError = installation.materializationError?.trim() || undefined;
+
+	return {
+		...installation,
+		materializationStatus,
+		materializationError,
+	};
+};
+
+export const normalizeAppShellPayload = (payload: AppShellPayload | null | undefined): AppShellPayload => ({
+	installation: normalizeInstallation(payload?.installation),
+	admin: payload?.admin,
+	organizations: Array.isArray(payload?.organizations) ? payload.organizations : [],
+	departments: Array.isArray(payload?.departments) ? payload.departments : [],
+	teams: Array.isArray(payload?.teams) ? payload.teams : [],
+	projects: Array.isArray(payload?.projects) ? payload.projects : [],
+	workspaces: Array.isArray(payload?.workspaces) ? payload.workspaces : [],
+});

Frontend/src/components/app-shell/data/shell.context-menu.ts

@@ -0,0 +1,174 @@
+// Path: Frontend/src/components/app-shell/data/shell.context-menu.ts
+
+import { getWorkspaceCreateActions, getWorkspaceItemTypeDefinition } from "./shell.registry";
+import type {
+	ActiveProject,
+	ProjectContextMenuAction,
+	ProjectContextMenuSection,
+	ProjectItem,
+	ProjectMenuTarget,
+	WorkspaceContextMenuSection,
+	WorkspaceContextMenuTarget,
+	WorkspaceStaticItem,
+	WorkspaceTreeNode,
+} from "./shell.types";
+
+export { getWorkspaceContextMenuEyebrow } from "./shell.registry";
+
+export const createWorkspaceSurfaceTarget = (workspace: ActiveProject): WorkspaceContextMenuTarget => ({
+	id: `workspace-${workspace.id}`,
+	label: workspace.name,
+	kind: "workspace",
+});
+
+export const createWorkspaceStaticTarget = (item: WorkspaceStaticItem): WorkspaceContextMenuTarget => ({
+	id: item.id,
+	label: item.label,
+	kind: item.contextKind,
+});
+
+export const createWorkspaceTreeTarget = (node: WorkspaceTreeNode): WorkspaceContextMenuTarget => ({
+	id: node.id,
+	label: node.label,
+	...(node.kind === "folder"
+		? { kind: "folder" as const }
+		: {
+			kind: "item" as const,
+			itemType: node.itemType,
+		}),
+});
+
+export const getWorkspaceContextMenuSections = (
+	target: WorkspaceContextMenuTarget,
+): readonly WorkspaceContextMenuSection[] => {
+	const createActions = getWorkspaceCreateActions();
+	const createSubmenuAction = {
+		id: "create",
+		label: "Create",
+		children: createActions,
+	} as const;
+
+	switch (target.kind) {
+		case "workspace":
+			return [
+				{ id: "create", label: undefined, items: [createSubmenuAction] },
+				{
+					id: "workspace",
+					label: undefined,
+					items: [
+						{ id: "rename-workspace", label: "Rename workspace", shortcut: { key: "enter" } },
+						{ id: "copy-workspace-link", label: "Copy link", shortcut: { modifiers: ["meta"], key: "c" } },
+					],
+				},
+			] as const;
+		case "home":
+			return [
+				{ id: "create", label: undefined, items: [createSubmenuAction] },
+				{ id: "workspace", label: undefined, items: [{ id: "open-home", label: "Open home", shortcut: { key: "enter" } }] },
+			] as const;
+		case "settings":
+			return [
+				{
+					id: "settings",
+					label: undefined,
+					items: [
+						{ id: "open-settings", label: "Open settings", shortcut: { key: "enter" } },
+						{ id: "copy-settings-link", label: "Copy link", shortcut: { modifiers: ["meta"], key: "c" } },
+					],
+				},
+			] as const;
+		case "folder":
+			return [
+				{ id: "open", items: [{ id: "open-folder", label: "Open folder", shortcut: { key: "enter" } }, { id: "rename-folder", label: "Rename", shortcut: { modifiers: ["meta"], key: "r" } }] },
+				{ id: "create", label: undefined, items: [createSubmenuAction] },
+				{
+					id: "organize",
+					label: undefined,
+					items: [
+						{ id: "move-folder", label: "Move…", shortcut: { modifiers: ["meta"], key: "m" } },
+						{ id: "delete-folder", label: "Delete", shortcut: { modifiers: ["meta"], key: "delete" }, tone: "danger" },
+					],
+				},
+			] as const;
+		case "item": {
+			const definition = getWorkspaceItemTypeDefinition(target.itemType);
+			const actionPrefix = definition.actionPrefix;
+			const nounLabel = definition.noun;
+
+			return [
+				{
+					id: `${actionPrefix}-primary`,
+					items: [
+						{ id: `open-${actionPrefix}`, label: `Open ${nounLabel}`, shortcut: { key: "enter" } },
+						{ id: `rename-${actionPrefix}`, label: "Rename", shortcut: { modifiers: ["meta"], key: "r" } },
+					],
+				},
+				{
+					id: "organize",
+					label: undefined,
+					items: [
+						{ id: `move-${actionPrefix}`, label: "Move…", shortcut: { modifiers: ["meta"], key: "m" } },
+						{ id: `delete-${actionPrefix}`, label: "Delete", shortcut: { modifiers: ["meta"], key: "delete" }, tone: "danger" },
+					],
+				},
+			] as const;
+		}
+	}
+};
+
+const getProjectCreateActions = (): readonly ProjectContextMenuAction[] =>
+	[
+		{ id: "new-project", label: "New project" },
+		{ id: "new-folder", label: "New folder" },
+	] as const;
+
+const getProjectFolderDangerActions = (): readonly ProjectContextMenuAction[] =>
+	[
+		{ id: "rename-folder", label: "Rename", shortcut: { modifiers: ["meta"], key: "r" } },
+		{ id: "delete-folder", label: "Delete", shortcut: { modifiers: ["meta"], key: "delete" }, tone: "danger" },
+	] as const;
+
+export const createProjectSurfaceTarget = (label = "Projects"): ProjectMenuTarget => ({
+	id: "project-surface",
+	label,
+	kind: "surface",
+});
+
+export const createProjectFolderTarget = (id: string, label: string): ProjectMenuTarget => ({
+	id,
+	label,
+	kind: "folder",
+});
+
+export const createProjectTarget = (project: ProjectItem): ProjectMenuTarget => ({
+	id: project.id,
+	label: project.name,
+	kind: "project",
+});
+
+export const getProjectContextMenuEyebrow = (target: ProjectMenuTarget): string => {
+	switch (target.kind) {
+		case "surface":
+			return "Projects";
+		case "folder":
+			return "Folder";
+		case "project":
+			return "Project";
+	}
+};
+
+export const getProjectContextMenuSections = (target: ProjectMenuTarget): readonly ProjectContextMenuSection[] => {
+	const createActions = getProjectCreateActions();
+
+	switch (target.kind) {
+		case "surface":
+			return [{ id: "create", items: createActions }] as const;
+		case "folder":
+			return [
+				{ id: "create", items: createActions },
+				{ id: "organize", items: getProjectFolderDangerActions() },
+			] as const;
+		case "project":
+			return [{ id: "create", items: createActions }] as const;
+	}
+};

Frontend/src/components/app-shell/data/shell.data.ts

@@ -0,0 +1,6 @@
+// Path: Frontend/src/components/app-shell/data/shell.data.ts
+
+export * from "./shell.types";
+export * from "./shell.registry";
+export * from "./shell.scaffold";
+export * from "./shell.context-menu";

Frontend/src/components/app-shell/data/shell.registry.ts

@@ -0,0 +1,100 @@
+// Path: Frontend/src/components/app-shell/data/shell.registry.ts
+
+import { FileText, LayoutGrid } from "../../../lib/icons";
+import type {
+	ShellIcon,
+	WorkspaceContextMenuAction,
+	WorkspaceContextMenuTarget,
+	WorkspaceItemTypeDefinition,
+	WorkspaceItemTypeId,
+	WorkspaceTreeNode,
+} from "./shell.types";
+
+export const firstPartyWorkspaceItemTypes: readonly WorkspaceItemTypeDefinition[] = [
+	{
+		id: "core.doc",
+		label: "Doc",
+		shortLabel: "Doc",
+		icon: FileText,
+		noun: "doc",
+		actionPrefix: "doc",
+		defaultCreateLabel: "New doc",
+		includeInWorkspaceCreate: true,
+		description: "Rich text documents and notes.",
+	},
+	{
+		id: "core.board.kanban",
+		label: "Kanban board",
+		shortLabel: "Board",
+		icon: LayoutGrid,
+		noun: "board",
+		actionPrefix: "board",
+		defaultCreateLabel: "New board",
+		includeInWorkspaceCreate: true,
+		description: "Default board-style workspace item.",
+	},
+	{
+		id: "core.board.list",
+		label: "List board",
+		shortLabel: "Board",
+		icon: LayoutGrid,
+		noun: "board",
+		actionPrefix: "list-board",
+		defaultCreateLabel: "New list board",
+		description: "Alternate first-party board view prepared for the future registry.",
+	},
+] as const;
+
+const workspaceItemTypeMap = new Map<WorkspaceItemTypeId, WorkspaceItemTypeDefinition>(
+	firstPartyWorkspaceItemTypes.map((definition) => [definition.id, definition]),
+);
+
+const createUnknownWorkspaceItemTypeDefinition = (
+	itemType: WorkspaceItemTypeId,
+): WorkspaceItemTypeDefinition => ({
+	id: itemType,
+	label: "Item",
+	shortLabel: "Item",
+	icon: FileText,
+	noun: "item",
+	actionPrefix: "item",
+	defaultCreateLabel: "New item",
+	description: "Fallback definition for unknown or future workspace item types.",
+});
+
+export const getWorkspaceItemTypeDefinition = (itemType: WorkspaceItemTypeId): WorkspaceItemTypeDefinition => {
+	return workspaceItemTypeMap.get(itemType) ?? createUnknownWorkspaceItemTypeDefinition(itemType);
+};
+
+export const getWorkspaceNodeIcon = (node: WorkspaceTreeNode): ShellIcon =>
+	node.kind === "folder" ? node.icon : getWorkspaceItemTypeDefinition(node.itemType).icon;
+
+export const getWorkspaceCreateActions = (): readonly WorkspaceContextMenuAction[] => [
+	{ id: "new-folder", label: "New folder", shortcut: { modifiers: ["alt"], key: "f" } },
+	...firstPartyWorkspaceItemTypes
+		.filter((definition) => definition.includeInWorkspaceCreate)
+		.map((definition) => ({
+			id: `create-${definition.actionPrefix}`,
+			label: definition.defaultCreateLabel,
+			shortcut:
+				definition.id === "core.board.kanban"
+					? ({ modifiers: ["alt"], key: "b" } as const)
+					: definition.id === "core.doc"
+						? ({ modifiers: ["alt"], key: "d" } as const)
+						: undefined,
+		})),
+];
+
+export const getWorkspaceContextMenuEyebrow = (target: WorkspaceContextMenuTarget): string => {
+	switch (target.kind) {
+		case "workspace":
+		case "home":
+			return "Workspace";
+		case "settings":
+			return "Configuration";
+		case "folder":
+			return "Folder";
+		case "item":
+			return getWorkspaceItemTypeDefinition(target.itemType).shortLabel;
+	}
+};

Frontend/src/components/app-shell/data/shell.scaffold.ts

@@ -0,0 +1,222 @@
+// Path: Frontend/src/components/app-shell/data/shell.scaffold.ts
+
+import {
+	Bell,
+	CircleHelp,
+	FileText,
+	Folder,
+	Home,
+	Keyboard,
+	LayoutGrid,
+	ListCollapse,
+	LogOut,
+	Repeat,
+	Search,
+	Settings,
+	Shield,
+	User,
+} from "../../../lib/icons";
+import type {
+	ActiveDepartment,
+	ActiveProject,
+	ActiveServer,
+	ActiveUserProfile,
+	DepartmentItem,
+	MobileBottomNavItem,
+	NotificationItem,
+	ProfileMenuSection,
+	ProjectItem,
+	RailItem,
+	ServerDockAction,
+	SidebarHeaderAction,
+	TopBarAction,
+	WorkspaceStaticItem,
+	WorkspaceTreeNode,
+} from "./shell.types";
+
+export const personalDockActions: readonly ServerDockAction[] = [
+	{ id: "account", label: "Account", icon: User },
+	{ id: "settings", label: "Settings", icon: Settings },
+] as const;
+
+export const organizationAdminDockActions: readonly ServerDockAction[] = [
+	{ id: "members", label: "Members", icon: User },
+	{ id: "server", label: "Server", icon: Settings },
+] as const;
+
+export const railItems: readonly RailItem[] = [
+	{ id: "personal-server", label: "Personal Server Name", abbreviation: "P", kind: "personal" },
+	{ id: "organization-server", label: "Organization Name", abbreviation: "O", kind: "organization", active: true },
+	{ id: "design-review", label: "Design Review", abbreviation: "D", kind: "organization" },
+] as const;
+
+export const activeServer: ActiveServer = {
+	id: "organization-server",
+	name: "Organization Name",
+	abbreviation: "O",
+	kind: "organization",
+	connectedLabel: "12 connected",
+	dockActions: organizationAdminDockActions,
+};
+
+export const activeProject: ActiveProject = {
+	id: "general",
+	name: "General",
+};
+
+export const activeDepartment: ActiveDepartment = {
+	id: "product",
+	name: "Product",
+	teamName: "Design Systems",
+};
+
+export const projectItems: readonly ProjectItem[] = [
+	{
+		id: "general",
+		name: "General",
+		description: "Default shared project",
+		groupLabel: "Shared space",
+		parentLabel: "Workspace home",
+		meta: "1 workspace",
+		active: true,
+	},
+	{
+		id: "operations",
+		name: "Operations",
+		description: "Cross-team planning and delivery",
+		groupLabel: "Team folders",
+		parentLabel: "Shared Services",
+		meta: "2 workspaces",
+	},
+	{
+		id: "hiring",
+		name: "Hiring",
+		description: "Candidate pipeline and interview loops",
+		groupLabel: "Team folders",
+		parentLabel: "People Ops",
+		meta: "1 workspace",
+	},
+] as const;
+
+export const departmentItems: readonly DepartmentItem[] = [
+	{ id: "product", name: "Product", teams: ["Design Systems", "Research Ops"], active: true },
+	{ id: "engineering", name: "Engineering", teams: ["Platform", "Realtime Collaboration"] },
+	{ id: "operations", name: "Operations", teams: ["Shared Services", "People Ops"] },
+] as const;
+
+export const workspaceStaticItems: readonly WorkspaceStaticItem[] = [
+	{ id: "home", label: "Home", icon: Home, active: true, contextKind: "home" },
+	{ id: "workspace-settings", label: "Settings", icon: Settings, contextKind: "settings" },
+] as const;
+
+export const workspaceTree: readonly WorkspaceTreeNode[] = [
+	{
+		id: "product-workspace",
+		label: "Product",
+		kind: "folder",
+		icon: Folder,
+		children: [
+			{ id: "roadmap-board", label: "Roadmap", kind: "item", itemType: "core.board.kanban", active: true },
+			{ id: "launch-brief", label: "Launch Brief", kind: "item", itemType: "core.doc" },
+			{
+				id: "research-folder",
+				label: "Research",
+				kind: "folder",
+				icon: Folder,
+				children: [
+					{ id: "interviews-doc", label: "Interviews", kind: "item", itemType: "core.doc" },
+					{ id: "signals-board", label: "Signals", kind: "item", itemType: "core.board.kanban", meta: "2" },
+				],
+			},
+		],
+	},
+	{
+		id: "design-folder",
+		label: "Design",
+		kind: "folder",
+		icon: Folder,
+		children: [
+			{ id: "system-doc", label: "Design System", kind: "item", itemType: "core.doc" },
+			{ id: "review-board", label: "Review Queue", kind: "item", itemType: "core.board.kanban" },
+		],
+	},
+	{ id: "general-notes", label: "General Notes", kind: "item", itemType: "core.doc" },
+] as const;
+
+export const workspaceSidebarHeaderActions: readonly SidebarHeaderAction[] = [
+	{ id: "search-workspace", label: "Search workspace", icon: Search },
+	{ id: "toggle-workspace-folders", label: "Collapse all folders", icon: ListCollapse },
+] as const;
+
+export const mobileBottomNavItems: readonly MobileBottomNavItem[] = [
+	{ id: "home", label: "Home", icon: Home, active: true },
+	{ id: "search", label: "Search", icon: Search },
+	{ id: "browse", label: "Browse", icon: Folder },
+] as const;
+
+export const topBarActions: readonly TopBarAction[] = [{ id: "search", label: "Search", icon: Search }] as const;
+
+export const notificationItems: readonly NotificationItem[] = [
+	{
+		id: "comment-design-systems",
+		title: "New comment on Design Systems",
+		contextLabel: "Product • Review thread updated",
+		timeLabel: "2m ago",
+		unread: true,
+	},
+	{
+		id: "sprint-platform",
+		title: "Sprint updated in Platform",
+		contextLabel: "Engineering • Scope changed",
+		timeLabel: "15m ago",
+		unread: true,
+	},
+	{
+		id: "member-joined",
+		title: "New member joined Operations",
+		contextLabel: "Organization Name • Access granted",
+		timeLabel: "1h ago",
+	},
+	{
+		id: "daily-summary",
+		title: "Daily summary is ready",
+		contextLabel: "General • 8 updates across boards",
+		timeLabel: "Today, 8:00 AM",
+	},
+] as const;
+
+export const unreadNotificationCount = notificationItems.filter((item) => item.unread).length;
+
+export const activeUserProfile: ActiveUserProfile = {
+	name: "Demo Account",
+	email: "demo@moku.work",
+	roleLabel: "Founder · Product",
+	contextLabel: "Organization Name • Design Systems",
+};
+
+export const profileMenuSections: readonly ProfileMenuSection[] = [
+	{
+		id: "account",
+		items: [
+			{ id: "profile", label: "Profile", icon: User },
+			{ id: "account-settings", label: "Account Settings", icon: Settings },
+			{ id: "notifications", label: "Notifications", icon: Bell },
+			{ id: "security", label: "Security", icon: Shield },
+		],
+	},
+	{
+		id: "preferences",
+		items: [
+			{ id: "keyboard-shortcuts", label: "Keyboard Shortcuts", icon: Keyboard },
+			{ id: "theme-preferences", label: "Theme Preferences", icon: Settings },
+			{ id: "help-support", label: "Help & Support", icon: CircleHelp },
+		],
+	},
+	{
+		id: "session",
+		items: [
+			{ id: "switch-account", label: "Switch Account", icon: Repeat },
+			{ id: "sign-out", label: "Sign Out", icon: LogOut, tone: "danger" },
+		],
+	},
+] as const;

Frontend/src/components/app-shell/data/shell.types.ts

@@ -0,0 +1,233 @@
+// Path: Frontend/src/components/app-shell/data/shell.types.ts
+
+import type { Component } from "solid-js";
+
+export type ShellIconProps = {
+	class?: string;
+	size?: number;
+	strokeWidth?: number;
+};
+
+export type ShellIcon = Component<ShellIconProps>;
+
+export type RailItem = {
+	id: string;
+	label: string;
+	abbreviation: string;
+	kind: "personal" | "organization";
+	active?: boolean;
+};
+
+export type ServerDockAction = {
+	id: string;
+	label: string;
+	icon: ShellIcon;
+};
+
+export type ActiveServer = {
+	id: string;
+	name: string;
+	abbreviation: string;
+	kind: "personal" | "organization";
+	connectedLabel?: string;
+	subtitle?: string;
+	dockActions: readonly ServerDockAction[];
+};
+
+export type ActiveProject = {
+	id: string;
+	name: string;
+};
+
+export type ActiveDepartment = {
+	id: string;
+	name: string;
+	teamName: string;
+};
+
+export type DepartmentItem = {
+	id: string;
+	name: string;
+	teams: readonly string[];
+	active?: boolean;
+};
+
+export type ProjectItem = {
+	id: string;
+	name: string;
+	description: string;
+	groupLabel?: string;
+	parentLabel?: string;
+	meta?: string;
+	active?: boolean;
+};
+
+export type ProjectMenuTarget =
+	| {
+		id: string;
+		label: string;
+		kind: "surface";
+	  }
+	| {
+		id: string;
+		label: string;
+		kind: "folder";
+	  }
+	| {
+		id: string;
+		label: string;
+		kind: "project";
+	  };
+
+export type ProjectContextMenuAction = {
+	id: string;
+	label: string;
+	tone?: "default" | "danger";
+	shortcut?: WorkspaceContextMenuShortcut;
+	children?: readonly ProjectContextMenuAction[];
+};
+
+export type ProjectContextMenuSection = {
+	id: string;
+	label?: string;
+	items: readonly ProjectContextMenuAction[];
+};
+
+export type SidebarItem = {
+	id: string;
+	label: string;
+	icon: ShellIcon;
+	active?: boolean;
+	meta?: string;
+};
+
+export type WorkspaceStaticKind = "workspace" | "home" | "settings";
+
+export type WorkspaceItemTypeId = string;
+
+export type WorkspaceStaticItem = SidebarItem & {
+	contextKind: WorkspaceStaticKind;
+};
+
+export type WorkspaceFolderNode = {
+	id: string;
+	path?: string;
+	label: string;
+	kind: "folder";
+	icon: ShellIcon;
+	active?: boolean;
+	meta?: string;
+	children?: readonly WorkspaceTreeNode[];
+};
+
+export type WorkspaceItemNode = {
+	id: string;
+	path?: string;
+	label: string;
+	kind: "item";
+	itemType: WorkspaceItemTypeId;
+	active?: boolean;
+	meta?: string;
+	children?: undefined;
+};
+
+export type WorkspaceTreeNode = WorkspaceFolderNode | WorkspaceItemNode;
+
+export type WorkspaceItemTypeDefinition = {
+	id: WorkspaceItemTypeId;
+	label: string;
+	shortLabel: string;
+	icon: ShellIcon;
+	noun: string;
+	actionPrefix: string;
+	defaultCreateLabel: string;
+	includeInWorkspaceCreate?: boolean;
+	description?: string;
+};
+
+export type SidebarHeaderAction = {
+	id: string;
+	label: string;
+	icon: ShellIcon;
+};
+
+export type TopBarAction = {
+	id: string;
+	label: string;
+	icon: ShellIcon;
+};
+
+export type MobileBottomNavItem = {
+	id: string;
+	label: string;
+	icon: ShellIcon;
+	active?: boolean;
+};
+
+export type WorkspaceContextMenuTarget =
+	| {
+		id: string;
+		label: string;
+		kind: WorkspaceStaticKind;
+	  }
+	| {
+		id: string;
+		label: string;
+		kind: "folder";
+	  }
+	| {
+		id: string;
+		label: string;
+		kind: "item";
+		itemType: WorkspaceItemTypeId;
+	  };
+
+export type WorkspaceContextMenuAction = {
+	id: string;
+	label: string;
+	tone?: "default" | "danger";
+	shortcut?: WorkspaceContextMenuShortcut;
+	children?: readonly WorkspaceContextMenuAction[];
+};
+
+export type WorkspaceContextMenuShortcutModifier = "meta" | "alt" | "shift";
+
+export type WorkspaceContextMenuShortcutKey = "b" | "c" | "d" | "delete" | "enter" | "f" | "m" | "r";
+
+export type WorkspaceContextMenuShortcut = {
+	modifiers?: readonly WorkspaceContextMenuShortcutModifier[];
+	key: WorkspaceContextMenuShortcutKey;
+};
+
+export type WorkspaceContextMenuSection = {
+	id: string;
+	label?: string;
+	items: readonly WorkspaceContextMenuAction[];
+};
+
+export type NotificationItem = {
+	id: string;
+	title: string;
+	contextLabel: string;
+	timeLabel: string;
+	unread?: boolean;
+};
+
+export type ProfileMenuAction = {
+	id: string;
+	label: string;
+	icon: ShellIcon;
+	tone?: "default" | "danger";
+};
+
+export type ProfileMenuSection = {
+	id: string;
+	items: readonly ProfileMenuAction[];
+};
+
+export type ActiveUserProfile = {
+	name: string;
+	email: string;
+	roleLabel: string;
+	contextLabel: string;
+};

Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.data.ts

@@ -0,0 +1,173 @@
+// Path: Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.data.ts
+
+export type BootstrapStepKey = "persona" | "instance" | "mode" | "admin" | "structure";
+
+export type BootstrapStepDefinition = {
+	id: BootstrapStepKey;
+	title: string;
+	buttonLabel: string;
+};
+
+export type InstanceForm = {
+	protocol: "http" | "https";
+	access: "local" | "remote";
+	host: string;
+};
+
+export type ModeForm = {
+	mode: "personal" | "organizational";
+	name: string;
+};
+
+export type AdminForm = {
+	displayName: string;
+	email: string;
+	password: string;
+};
+
+export type StructureForm = {
+	departmentName: string;
+	teamName: string;
+	projectName: string;
+};
+
+export type BootstrapPersona = "personal" | "enthusiast" | "team" | "organization";
+
+export type BootstrapPersonaDefinition = {
+	id: BootstrapPersona;
+	title: string;
+	isAvailable: boolean;
+	bestFor: string;
+	bullets: readonly string[];
+	defaults: {
+		protocol: InstanceForm["protocol"];
+		access: InstanceForm["access"];
+		host: string;
+		mode: ModeForm["mode"];
+		namePlaceholder: string;
+		departmentName: string;
+		teamName: string;
+		projectName: string;
+	};
+};
+
+export const bootstrapStepDefinitions: readonly BootstrapStepDefinition[] = [
+	{ id: "persona", title: "What are you setting up your server for?", buttonLabel: "Continue" },
+	{ id: "instance", title: "Connection details", buttonLabel: "Save and continue" },
+	{ id: "mode", title: "Server identity", buttonLabel: "Save and continue" },
+	{ id: "admin", title: "Admin account", buttonLabel: "Save and continue" },
+	{ id: "structure", title: "Initial structure", buttonLabel: "Submit" },
+];
+
+export const defaultInstanceForm: InstanceForm = {
+	protocol: "http",
+	access: "local",
+	host: "localhost",
+};
+
+export const defaultModeForm: ModeForm = {
+	mode: "personal",
+	name: "",
+};
+
+export const defaultAdminForm: AdminForm = {
+	displayName: "Admin",
+	email: "admin@example.com",
+	password: "",
+};
+
+export const personalStructureDefaults = {
+	departmentName: "Default",
+	teamName: "Personal",
+};
+
+export const organizationalStructureDefaults = {
+	departmentName: "Department",
+	teamName: "Team",
+};
+
+export const defaultStructureForm: StructureForm = {
+	...personalStructureDefaults,
+	projectName: "Project",
+};
+
+export const bootstrapPersonaDefinitions: readonly BootstrapPersonaDefinition[] = [
+	{
+		id: "personal",
+		title: "Personal",
+		isAvailable: true,
+		bestFor: "Best for low maintenance, personal use",
+		bullets: ["Preconfigured for personal use", "Low setup time", "Easy to manage"],
+		defaults: {
+			protocol: "http",
+			access: "local",
+			host: "localhost",
+			mode: "personal",
+			namePlaceholder: "Personal Server",
+			departmentName: "Default",
+			teamName: "Personal",
+			projectName: "Project",
+		},
+	},
+	{
+		id: "enthusiast",
+		title: "Self Hosted Enthusiast",
+		isAvailable: true,
+		bestFor: "Best for people who want to customize their server",
+		bullets: ["Networking knowledge", "Comfortable with tinkering", "Willing to troubleshoot issues"],
+		defaults: {
+			protocol: "https",
+			access: "remote",
+			host: "moku.local",
+			mode: "personal",
+			namePlaceholder: "Personal Server",
+			departmentName: "Default",
+			teamName: "Personal",
+			projectName: "Project",
+		},
+	},
+	{
+		id: "team",
+		title: "Team",
+		isAvailable: true,
+		bestFor: "Best for low maintenance but for small team",
+		bullets: ["Built-in collaboration with low setup time", "Keeps the shared structure simple", "Good for a small product, design, or delivery team"],
+		defaults: {
+			protocol: "http",
+			access: "local",
+			host: "localhost",
+			mode: "organizational",
+			namePlaceholder: "Team Server",
+			departmentName: "Default",
+			teamName: "Core Team",
+			projectName: "Project",
+		},
+	},
+	{
+		id: "organization",
+		title: "Organization",
+		isAvailable: true,
+		bestFor: "Best for multiple teams and shared ownership",
+		bullets: ["SME to Organization", "Fine grained access control", "Better fit for teams with multiple departments"],
+		defaults: {
+			protocol: "https",
+			access: "remote",
+			host: "workspace.example.com",
+			mode: "organizational",
+			namePlaceholder: "Organization server name",
+			departmentName: "Operations",
+			teamName: "Platform Team",
+			projectName: "Moku",
+		},
+	},
+];
+
+export const workspaceHomeFieldTooltips = {
+	protocol: "Usually people use http for a local-only setup and https when the server will be reached over a domain or reverse proxy.",
+	access: "Usually people use local when Moku is only reached on the same machine or LAN, and remote when they plan to reach it from another network or public domain.",
+	host: "Examples people usually set here are localhost, moku.local, or a real domain like workspace.example.com depending on how they plan to reach the server.",
+	serverName: "This is the friendly name people usually give the server itself, for example Personal Server, Ronald's Server, Homelab, Studio, or Workspace.",
+	department: "Departments are the highest-level grouping for work. People usually use names like Default, Operations, Product, Design, or Engineering.",
+	team: "Teams sit inside a department. Common examples are Personal, Platform Team, Core Team, Delivery, or Design Systems.",
+	project: "Projects are the workspace or initiative people work inside. Common examples are Project, Shared Workspace, Moku, Client Portal, or Website Redesign.",
+} as const;

Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.hook.ts

@@ -0,0 +1,469 @@
+// Path: Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.hook.ts
+
+import { createEffect, createMemo, createSignal, onCleanup } from "solid-js";
+import { createStore } from "solid-js/store";
+import {
+	bootstrapPersonaDefinitions,
+	bootstrapStepDefinitions,
+	defaultAdminForm,
+	defaultInstanceForm,
+	defaultModeForm,
+	defaultStructureForm,
+	organizationalStructureDefaults,
+	personalStructureDefaults,
+	type AdminForm,
+	type BootstrapPersona,
+	type BootstrapPersonaDefinition,
+	type BootstrapStepDefinition,
+	type BootstrapStepKey,
+	type InstanceForm,
+	type ModeForm,
+	type StructureForm,
+} from "./BootstrapWizard.data";
+import { submitBootstrapStepRequest } from "./bootstrapWizard.api";
+
+type AppShellBootstrapAdapter = {
+	installation: () => { isBootstrapped?: boolean; materializationStatus?: string; materializationError?: string } | undefined;
+	status: () => string;
+	reload: () => Promise<void>;
+};
+
+export type BootstrapSubmissionState = {
+	status: "idle" | "submitting" | "success" | "error";
+	error: string;
+};
+
+export type MaterializationState = "not_started" | "pending" | "running" | "succeeded" | "failed";
+
+export type FieldTooltipState = {
+	text: string;
+	left: number;
+	top: number;
+	placement: "top" | "bottom";
+};
+
+const initialSubmissionState = (): BootstrapSubmissionState => ({
+	status: "idle",
+	error: "",
+});
+
+const materializationPollIntervalMs = 2000;
+
+export const useBootstrapWizard = (appShellData: AppShellBootstrapAdapter) => {
+	const [instanceForm, setInstanceForm] = createStore<InstanceForm>({ ...defaultInstanceForm });
+	const [modeForm, setModeForm] = createStore<ModeForm>({ ...defaultModeForm });
+	const [adminForm, setAdminForm] = createStore<AdminForm>({ ...defaultAdminForm });
+	const [structureForm, setStructureForm] = createStore<StructureForm>({ ...defaultStructureForm });
+	const [selectedPersona, setSelectedPersona] = createSignal<BootstrapPersona>("enthusiast");
+	const [hasChosenPersona, setHasChosenPersona] = createSignal(false);
+	const [stepState, setStepState] = createStore<Record<BootstrapStepKey, BootstrapSubmissionState>>({
+		persona: initialSubmissionState(),
+		instance: initialSubmissionState(),
+		mode: initialSubmissionState(),
+		admin: initialSubmissionState(),
+		structure: initialSubmissionState(),
+	});
+	const [isBootstrapStateResolved, setIsBootstrapStateResolved] = createSignal(false);
+	const [isBootstrapComplete, setIsBootstrapComplete] = createSignal(false);
+	const [isWizardOpen, setIsWizardOpen] = createSignal(false);
+	const [isFinishingBootstrapFlow, setIsFinishingBootstrapFlow] = createSignal(false);
+	const [currentStepIndex, setCurrentStepIndex] = createSignal(0);
+	const [fieldTooltip, setFieldTooltip] = createSignal<FieldTooltipState | null>(null);
+
+	const installation = createMemo(() => appShellData.installation());
+	const materializationState = createMemo<MaterializationState>(() => {
+		const status = installation()?.materializationStatus;
+
+		switch (status) {
+			case "pending":
+			case "running":
+			case "failed":
+			case "succeeded":
+			case "not_started":
+				return status;
+			default:
+				return installation()?.isBootstrapped ? "succeeded" : "not_started";
+		}
+	});
+	const isBootstrapPersisted = createMemo(() => installation()?.isBootstrapped ?? false);
+	const isMaterializationInFlight = createMemo(() => materializationState() === "pending" || materializationState() === "running");
+	const hasMaterializationFailed = createMemo(() => materializationState() === "failed");
+	const showBootstrapFinishingState = createMemo(() => isFinishingBootstrapFlow() && (isMaterializationInFlight() || hasMaterializationFailed()));
+	const materializationStatusLabel = createMemo(() => {
+		switch (materializationState()) {
+			case "pending":
+				return "Materialization queued";
+			case "running":
+				return "Materialization running";
+			case "failed":
+				return "Materialization failed";
+			case "succeeded":
+				return "Ready";
+			default:
+				return "Not started";
+		}
+	});
+	const materializationMessage = createMemo(() => {
+		if (isMaterializationInFlight()) {
+			return "Your bootstrap is saved. The worker is still creating the POSIX skeleton and rebuilding the app shell index.";
+		}
+
+		if (hasMaterializationFailed()) {
+			return installation()?.materializationError || "Bootstrap saved, but background materialization did not finish cleanly.";
+		}
+
+		return "";
+	});
+	const personaDefinition = createMemo<BootstrapPersonaDefinition>(() => bootstrapPersonaDefinitions.find((persona) => persona.id === selectedPersona()) ?? bootstrapPersonaDefinitions[0]!);
+	const selectedPersonaIsAvailable = createMemo(() => personaDefinition().isAvailable);
+	const usesCondensedBootstrapFlow = createMemo(() => selectedPersona() === "personal" || selectedPersona() === "team");
+	const activeBootstrapSteps = createMemo<readonly BootstrapStepDefinition[]>(() => {
+		if (usesCondensedBootstrapFlow()) {
+			return [bootstrapStepDefinitions[0]!, bootstrapStepDefinitions[2]!, bootstrapStepDefinitions[3]!];
+		}
+
+		return bootstrapStepDefinitions;
+	});
+	const activeWizardSteps = createMemo(() => activeBootstrapSteps().filter((step) => step.id !== "persona"));
+
+	createEffect(() => {
+		const defaults = personaDefinition().defaults;
+
+		setInstanceForm({
+			protocol: defaults.protocol,
+			access: defaults.access,
+			host: defaults.host,
+		});
+		setModeForm("mode", defaults.mode);
+		setStructureForm({
+			departmentName: defaults.departmentName,
+			teamName: defaults.teamName,
+			projectName: defaults.projectName,
+		});
+	});
+
+	createEffect(() => {
+		if (modeForm.mode === "personal") {
+			setStructureForm("departmentName", personalStructureDefaults.departmentName);
+			setStructureForm("teamName", personalStructureDefaults.teamName);
+			return;
+		}
+
+		if (structureForm.departmentName === personalStructureDefaults.departmentName) {
+			setStructureForm("departmentName", organizationalStructureDefaults.departmentName);
+		}
+
+		if (structureForm.teamName === personalStructureDefaults.teamName) {
+			setStructureForm("teamName", organizationalStructureDefaults.teamName);
+		}
+	});
+
+	const resetWizardState = (): void => {
+		setSelectedPersona("enthusiast");
+		setHasChosenPersona(false);
+		setInstanceForm({ ...defaultInstanceForm });
+		setModeForm({ ...defaultModeForm });
+		setAdminForm({ ...defaultAdminForm });
+		setStructureForm({ ...defaultStructureForm });
+		setStepState({
+			persona: initialSubmissionState(),
+			instance: initialSubmissionState(),
+			mode: initialSubmissionState(),
+			admin: initialSubmissionState(),
+			structure: initialSubmissionState(),
+		});
+		setCurrentStepIndex(0);
+		setIsFinishingBootstrapFlow(false);
+	};
+
+	createEffect(() => {
+		const shellStatus = appShellData.status();
+
+		if (shellStatus === "idle" || shellStatus === "loading") {
+			return;
+		}
+
+		if (shellStatus !== "success") {
+			return;
+		}
+
+		if (!isBootstrapPersisted()) {
+			setIsFinishingBootstrapFlow(false);
+			resetWizardState();
+		}
+
+		setIsBootstrapComplete(isBootstrapPersisted() && !isMaterializationInFlight());
+		setIsWizardOpen(!isBootstrapPersisted() || showBootstrapFinishingState());
+		setIsBootstrapStateResolved(true);
+	});
+
+	createEffect(() => {
+		if (!isFinishingBootstrapFlow()) {
+			return;
+		}
+
+		if (isMaterializationInFlight() || hasMaterializationFailed()) {
+			return;
+		}
+
+		setIsFinishingBootstrapFlow(false);
+		setIsWizardOpen(false);
+	});
+
+	createEffect(() => {
+		if (!isBootstrapPersisted() || !isMaterializationInFlight()) {
+			return;
+		}
+
+		let cancelled = false;
+		let timeoutId: number | undefined;
+
+		const scheduleReload = (): void => {
+			timeoutId = window.setTimeout(async () => {
+				if (cancelled) {
+					return;
+				}
+
+				await appShellData.reload();
+
+				if (!cancelled && isBootstrapPersisted() && isMaterializationInFlight()) {
+					scheduleReload();
+				}
+			}, materializationPollIntervalMs);
+		};
+
+		scheduleReload();
+
+		onCleanup(() => {
+			cancelled = true;
+
+			if (timeoutId !== undefined) {
+				window.clearTimeout(timeoutId);
+			}
+		});
+	});
+
+	const bootstrapNamePlaceholder = (): string => personaDefinition().defaults.namePlaceholder;
+	const bootstrapStepCount = createMemo(() => activeWizardSteps().length);
+	const currentStep = createMemo<BootstrapStepDefinition>(() => activeBootstrapSteps()[currentStepIndex()] ?? activeBootstrapSteps()[0] ?? bootstrapStepDefinitions[0]!);
+	const currentWizardStepIndex = createMemo(() => {
+		const visibleIndex = activeWizardSteps().findIndex((step) => step.id === currentStep().id);
+
+		return visibleIndex >= 0 ? visibleIndex : 0;
+	});
+	const wizardProgressPercent = createMemo(() => {
+		const totalSteps = bootstrapStepCount();
+		const activeIndex = Math.max(currentWizardStepIndex(), 0);
+
+		if (totalSteps <= 1) {
+			return 100;
+		}
+
+		return (activeIndex / (totalSteps - 1)) * 100;
+	});
+	const wizardProgressFillWidth = createMemo(() => {
+		if (currentStepIndex() <= 0) {
+			return `${wizardProgressPercent()}%`;
+		}
+
+		return `calc(${wizardProgressPercent()}% + ((var(--control-size-md) - var(--space-2)) / 2))`;
+	});
+	const currentStepState = createMemo<BootstrapSubmissionState>(() => stepState[currentStep().id]);
+	const isFirstStep = (): boolean => currentStepIndex() === 0;
+	const isLastStep = (): boolean => currentStepIndex() === activeBootstrapSteps().length - 1;
+	const canDismissWizard = (): boolean => isBootstrapPersisted() && !isMaterializationInFlight();
+
+	createEffect(() => {
+		setCurrentStepIndex((index) => Math.min(index, activeBootstrapSteps().length - 1));
+	});
+
+	const submitStep = async (step: BootstrapStepKey, payload: unknown): Promise<boolean> => {
+		setStepState(step, { status: "submitting", error: "" });
+
+		try {
+			await submitBootstrapStepRequest(step, payload);
+
+			setStepState(step, {
+				status: "success",
+				error: "",
+			});
+
+			return true;
+		} catch (error) {
+			setStepState(step, {
+				status: "error",
+				error: error instanceof Error ? error.message : `Bootstrap ${step} request failed.`,
+			});
+
+			return false;
+		}
+	};
+
+	const payloadForStep = (step: BootstrapStepKey): unknown => {
+		switch (step) {
+			case "instance":
+				return instanceForm;
+			case "mode":
+				return modeForm;
+			case "admin":
+				return adminForm;
+			case "structure":
+				return structureForm;
+		}
+	};
+
+	const applyPersonaSelection = (persona: BootstrapPersona): void => {
+		const definition = bootstrapPersonaDefinitions.find((candidate) => candidate.id === persona);
+
+		if (!definition?.isAvailable) {
+			return;
+		}
+
+		setSelectedPersona(persona);
+		setHasChosenPersona(true);
+		setStepState("persona", {
+			status: "success",
+			error: "",
+		});
+		setCurrentStepIndex((index) => Math.min(index + 1, activeBootstrapSteps().length - 1));
+	};
+
+	const statusLabel = (state: BootstrapSubmissionState): string => {
+		switch (state.status) {
+			case "submitting":
+				return "Sending";
+			case "error":
+				return "Request failed";
+			default:
+				return "";
+		}
+	};
+
+	const submitCurrentStep = async (): Promise<void> => {
+		const step = currentStep().id;
+
+		if (step === "persona") {
+			applyPersonaSelection(selectedPersona());
+			return;
+		}
+
+		if (step === "mode" && usesCondensedBootstrapFlow() && stepState.instance.status !== "success") {
+			const didPersistInstanceDefaults = await submitStep("instance", instanceForm);
+
+			if (!didPersistInstanceDefaults) {
+				return;
+			}
+		}
+
+		const didSucceed = await submitStep(step, payloadForStep(step));
+
+		if (!didSucceed) {
+			return;
+		}
+
+		if (step === "admin" && usesCondensedBootstrapFlow()) {
+			const didPersistStructureDefaults = await submitStep("structure", structureForm);
+
+			if (!didPersistStructureDefaults) {
+				return;
+			}
+		}
+
+		if (isLastStep()) {
+			await appShellData.reload();
+
+			const shouldShowFinishingState = isBootstrapPersisted() && (isMaterializationInFlight() || hasMaterializationFailed());
+			setIsFinishingBootstrapFlow(shouldShowFinishingState);
+			setIsBootstrapComplete(isBootstrapPersisted() && !isMaterializationInFlight());
+			setIsWizardOpen(!isBootstrapPersisted() || shouldShowFinishingState);
+			setIsBootstrapStateResolved(true);
+			return;
+		}
+
+		setCurrentStepIndex((index) => Math.min(index + 1, activeBootstrapSteps().length - 1));
+	};
+
+	const showFieldTooltip = (target: HTMLElement, text: string): void => {
+		const rect = target.getBoundingClientRect();
+		const placement = rect.top > 96 ? "top" : "bottom";
+		const viewportPadding = 20;
+		const left = Math.min(Math.max(rect.left + rect.width / 2, viewportPadding), window.innerWidth - viewportPadding);
+		const top = placement === "top" ? rect.top - 10 : rect.bottom + 10;
+
+		setFieldTooltip({ text, left, top, placement });
+	};
+
+	const hideFieldTooltip = (): void => {
+		setFieldTooltip(null);
+	};
+
+	const stepStatusLabel = (step: BootstrapStepDefinition): string => {
+		const state = stepState[step.id];
+
+		if (state.status === "success") {
+			return "Done";
+		}
+
+		if (state.status === "error") {
+			return "Needs retry";
+		}
+
+		return "";
+	};
+
+	return {
+		instanceForm,
+		setInstanceForm,
+		modeForm,
+		setModeForm,
+		adminForm,
+		setAdminForm,
+		structureForm,
+		setStructureForm,
+		selectedPersona,
+		setSelectedPersona,
+		hasChosenPersona,
+		stepState,
+		isBootstrapStateResolved,
+		isBootstrapComplete,
+		isWizardOpen,
+		setIsWizardOpen,
+		isFinishingBootstrapFlow,
+		setIsFinishingBootstrapFlow,
+		fieldTooltip,
+		materializationState,
+		isMaterializationInFlight,
+		hasMaterializationFailed,
+		showBootstrapFinishingState,
+		materializationStatusLabel,
+		materializationMessage,
+		personaDefinition,
+		selectedPersonaIsAvailable,
+		usesCondensedBootstrapFlow,
+		activeWizardSteps,
+		bootstrapNamePlaceholder,
+		bootstrapStepCount,
+		currentStep,
+		currentWizardStepIndex,
+		wizardProgressFillWidth,
+		currentStepState,
+		isFirstStep,
+		canDismissWizard,
+		resetWizardState,
+		handleCurrentStepSubmit: (event: SubmitEvent & { currentTarget: HTMLFormElement; target: Element }): void => {
+			event.preventDefault();
+			void submitCurrentStep();
+		},
+		applyPersonaSelection,
+		statusLabel,
+		showFieldTooltip,
+		hideFieldTooltip,
+		stepStatusLabel,
+		navigateBack: (): void => {
+			setCurrentStepIndex((index) => Math.max(index - 1, 0));
+		},
+		navigateToVisibleStep: (index: number): void => {
+			setCurrentStepIndex(index + 1);
+		},
+	};
+};

Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.module.scss

@@ -1,3 +1,5 @@
+/* Path: Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.module.scss */
+
 .viewport,
 .wizardLayer {
   --workspace-content-max-width: var(--content-width-wide);
@@ -19,14 +21,14 @@
   display: grid;
   grid-template-columns: auto minmax(0, 1fr) auto;
   align-items: center;
-	gap: var(--space-2);
-	min-height: calc(var(--control-size-md) - var(--space-3));
-	padding: 0;
+  gap: var(--space-2);
+  min-height: calc(var(--control-size-md) - var(--space-3));
+  padding: 0;
 }
 
 .workspaceTopBarStart,
 .workspaceTopBarEnd {
-	min-width: calc(var(--control-size-md) - 0.5rem);
+  min-width: calc(var(--control-size-md) - 0.5rem);
   display: inline-flex;
   align-items: center;
 }
@@ -42,7 +44,7 @@
 }
 
 .workspaceBreadcrumb {
-	@include text-caption;
+  @include text-caption;
   min-width: 0;
   color: var(--color-text-muted);
   white-space: nowrap;
@@ -54,8 +56,8 @@
   display: inline-flex;
   align-items: center;
   justify-content: center;
-	width: calc(var(--control-size-md) - 0.5rem);
-	height: calc(var(--control-size-md) - 0.5rem);
+  width: calc(var(--control-size-md) - 0.5rem);
+  height: calc(var(--control-size-md) - 0.5rem);
   border: 1px solid color-mix(in srgb, var(--color-border-strong) 44%, transparent);
   border-radius: var(--radius-pill);
   background: color-mix(in srgb, var(--color-surface) 94%, transparent);
@@ -92,6 +94,21 @@
   flex-wrap: wrap;
 }
 
+.heroStatus {
+  display: grid;
+  gap: var(--space-2);
+  justify-items: start;
+}
+
+.heroStatusMessage {
+  max-width: 64ch;
+  color: var(--color-text-muted);
+}
+
+.heroStatusMessage[data-status="failed"] {
+  color: var(--color-danger-text, var(--color-text));
+}
+
 .title {
   @include text-display;
   font-family: var(--font-family-display);
@@ -194,6 +211,19 @@
   background: color-mix(in srgb, var(--color-success-surface, var(--color-surface-secondary)) 80%, transparent);
 }
 
+.statusBadge[data-status="pending"],
+.statusBadge[data-status="running"] {
+  color: var(--bootstrap-accent);
+  border-color: color-mix(in srgb, var(--bootstrap-accent) 38%, transparent);
+  background: color-mix(in srgb, var(--bootstrap-accent) 10%, var(--color-surface-secondary));
+}
+
+.statusBadge[data-status="failed"] {
+  color: var(--color-danger-text, var(--color-text));
+  border-color: color-mix(in srgb, var(--color-danger-border, var(--color-border)) 68%, transparent);
+  background: color-mix(in srgb, var(--color-danger-surface, var(--color-surface-secondary)) 80%, transparent);
+}
+
 .statusBadge[data-status="error"] {
   color: var(--color-danger-text, var(--color-text));
   border-color: color-mix(in srgb, var(--color-danger-border, var(--color-border)) 68%, transparent);
@@ -240,11 +270,249 @@
   color: var(--color-text-muted);
 }
 
+.fieldLabelRow {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.35rem;
+}
+
+.fieldInfoButton {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+  border: 0;
+  background: transparent;
+  color: var(--color-text-muted);
+  cursor: help;
+  outline: none;
+}
+
+.fieldInfoButton:hover,
+.fieldInfoButton:focus-visible {
+  color: var(--color-text);
+}
+
+.fieldTooltip {
+  position: fixed;
+  z-index: calc(var(--z-modal, 1000) + 4);
+  pointer-events: none;
+  transform: translateX(-50%);
+  max-width: min(18rem, calc(100vw - 2rem));
+}
+
+.fieldTooltip[data-placement="top"] {
+  transform: translate(-50%, -100%);
+}
+
+.fieldTooltip[data-placement="bottom"] {
+  transform: translate(-50%, 0);
+}
+
+.fieldTooltipBubble {
+  position: relative;
+  padding: 0.45rem 0.6rem;
+  border: 1px solid color-mix(in srgb, var(--color-border-strong) 48%, transparent);
+  border-radius: var(--radius-md);
+  background: color-mix(in srgb, var(--color-surface-elevated, var(--color-surface)) 96%, black 4%);
+  box-shadow: var(--shadow-soft);
+  color: var(--color-text);
+  white-space: normal;
+  text-align: left;
+  line-height: 1.35;
+}
+
+.fieldTooltipBubble::after {
+  content: "";
+  position: absolute;
+  left: 50%;
+  width: 0.55rem;
+  height: 0.55rem;
+  background: color-mix(in srgb, var(--color-surface-elevated, var(--color-surface)) 96%, black 4%);
+  transform: translateX(-50%) rotate(45deg);
+}
+
+.fieldTooltip[data-placement="top"] .fieldTooltipBubble::after {
+  top: calc(100% - 0.3rem);
+  border-right: 1px solid color-mix(in srgb, var(--color-border-strong) 48%, transparent);
+  border-bottom: 1px solid color-mix(in srgb, var(--color-border-strong) 48%, transparent);
+}
+
+.fieldTooltip[data-placement="bottom"] .fieldTooltipBubble::after {
+  bottom: calc(100% - 0.3rem);
+  border-top: 1px solid color-mix(in srgb, var(--color-border-strong) 48%, transparent);
+  border-left: 1px solid color-mix(in srgb, var(--color-border-strong) 48%, transparent);
+}
+
 .fieldHelp {
   @include text-caption;
   color: var(--color-text-muted);
 }
 
+.personaIntro {
+  display: grid;
+  gap: var(--space-2);
+}
+
+.personaGrid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: var(--space-3);
+}
+
+.personaCard {
+  appearance: none;
+  position: relative;
+  display: grid;
+  padding: var(--space-3);
+  border: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+  border-radius: var(--radius-xl);
+  background: color-mix(in srgb, var(--color-surface-secondary) 84%, transparent);
+  text-align: left;
+  overflow: hidden;
+  transition:
+    transform 180ms var(--easing-standard),
+    border-color 160ms var(--easing-standard),
+    background 160ms var(--easing-standard),
+    box-shadow 160ms var(--easing-standard);
+}
+
+.personaCard:hover,
+.personaCard:focus-visible,
+.personaCard[data-selected="true"] {
+  transform: translateY(-1px);
+  border-color: color-mix(in srgb, var(--bootstrap-accent) 32%, var(--color-border));
+  background: color-mix(in srgb, var(--bootstrap-accent) 7%, var(--color-surface));
+  box-shadow: var(--shadow-soft);
+}
+
+.personaCard:focus-visible {
+  outline: none;
+  box-shadow:
+    var(--shadow-soft),
+    0 0 0 3px color-mix(in srgb, var(--bootstrap-accent) 16%, transparent);
+}
+
+.personaCard[data-available="false"] {
+  opacity: 0.9;
+}
+
+.personaCard[data-available="false"]:hover,
+.personaCard[data-available="false"]:focus-visible,
+.personaCard[data-available="false"][data-selected="true"] {
+  transform: none;
+  border-color: color-mix(in srgb, var(--color-border) 88%, transparent);
+  background: color-mix(in srgb, var(--color-surface-secondary) 84%, transparent);
+  box-shadow: none;
+}
+
+.personaCardMedia {
+  position: relative;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  justify-self: center;
+  align-self: center;
+  width: min(100%, 16rem);
+  aspect-ratio: 1 / 1;
+  border: 1px dashed color-mix(in srgb, var(--color-border-strong) 40%, transparent);
+  border-radius: calc(var(--radius-xl) - var(--space-1));
+  background: linear-gradient(
+    135deg,
+    color-mix(in srgb, var(--color-surface-elevated) 92%, transparent),
+    color-mix(in srgb, var(--color-surface-secondary) 88%, transparent)
+  );
+  transition:
+    filter 180ms var(--easing-standard),
+    opacity 180ms var(--easing-standard),
+    transform 180ms var(--easing-standard);
+}
+
+.personaCardBody {
+  position: absolute;
+  inset: 0;
+  display: grid;
+  align-content: space-between;
+  gap: var(--space-3);
+  padding: var(--space-3);
+  pointer-events: none;
+  z-index: 1;
+}
+
+.personaCardTitle {
+  @include text-title;
+  margin: 0;
+  max-width: min(100%, 14rem);
+  padding: 0.35rem 0.65rem;
+  border-radius: var(--radius-md);
+  background: color-mix(in srgb, var(--color-surface) 84%, transparent);
+  backdrop-filter: blur(10px);
+  color: var(--color-text);
+}
+
+.personaCardDetails {
+  display: grid;
+  gap: var(--space-2);
+  max-height: 0;
+  opacity: 0;
+  overflow: hidden;
+  align-self: end;
+  padding: var(--space-3);
+  border-radius: var(--radius-lg);
+  background: linear-gradient(
+    180deg,
+    color-mix(in srgb, var(--color-surface) 18%, transparent),
+    color-mix(in srgb, var(--color-surface) 92%, transparent)
+  );
+  backdrop-filter: blur(12px);
+  transition:
+    max-height 180ms var(--easing-standard),
+    opacity 160ms var(--easing-standard);
+}
+
+.personaCard:hover .personaCardMedia,
+.personaCard:focus-visible .personaCardMedia,
+.personaCard[data-selected="true"] .personaCardMedia {
+  filter: brightness(0.72);
+  opacity: 0.92;
+  transform: scale(0.985);
+}
+
+.personaCard:hover .personaCardDetails,
+.personaCard:focus-visible .personaCardDetails,
+.personaCard[data-selected="true"] .personaCardDetails {
+  max-height: 12rem;
+  opacity: 1;
+}
+
+.personaCard[data-available="false"]:hover .personaCardMedia,
+.personaCard[data-available="false"]:focus-visible .personaCardMedia,
+.personaCard[data-available="false"][data-selected="true"] .personaCardMedia {
+  filter: brightness(0.82);
+  opacity: 0.96;
+  transform: none;
+}
+
+.personaBestFor,
+.personaBulletList {
+  margin: 0;
+  color: var(--color-text);
+}
+
+.personaBulletList {
+  padding-left: 1rem;
+  display: grid;
+  gap: 0.25rem;
+}
+
+.personaAvailability {
+  @include text-caption;
+  margin: 0;
+  color: var(--color-text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+}
+
 .field input,
 .field select {
   min-height: var(--control-size-md);
@@ -342,7 +610,7 @@
 .primaryButton:hover,
 .secondaryButton:hover,
 .wizardCloseButton:hover,
-.wizardStepButton:hover {
+.wizardProgressStep:hover {
   transform: translateY(-1px);
 }
 
@@ -417,72 +685,93 @@
 
 .wizardBody {
   display: grid;
-  grid-template-columns: minmax(17rem, 20rem) minmax(0, 1fr);
   gap: var(--space-4);
   min-height: 0;
 }
 
-.wizardSidebar {
+.wizardProgress {
+  position: relative;
   display: grid;
-  gap: var(--space-4);
-  align-content: start;
-}
-
-.wizardSidebarSection {
   gap: var(--space-3);
 }
 
-.wizardSteps {
-  display: grid;
-  gap: var(--space-2);
+.wizardProgressTrack {
+  position: absolute;
+  left: calc((var(--control-size-md) - var(--space-2)) / 2);
+  right: calc((var(--control-size-md) - var(--space-2)) / 2);
+  top: calc((var(--control-size-md) - var(--space-2)) / 2);
+  height: 2px;
+  background: color-mix(in srgb, var(--color-border) 72%, transparent);
+  transform: translateY(-50%);
+  pointer-events: none;
 }
 
-.wizardStepButton {
-  width: 100%;
-  display: grid;
-  grid-template-columns: auto minmax(0, 1fr);
+.wizardProgressFill {
+  height: 100%;
+  border-radius: 999px;
+  background: color-mix(in srgb, var(--bootstrap-accent) 72%, white 8%);
+  transition: width 220ms var(--easing-standard);
+}
+
+.wizardProgressSteps {
+  display: flex;
   align-items: center;
-  text-align: left;
-  padding: var(--space-2) var(--space-3);
-  border: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
-  background: color-mix(in srgb, var(--color-surface-secondary) 84%, transparent);
+  justify-content: space-between;
+  gap: 0;
 }
 
-.wizardStepButton[data-active="true"] {
-  border-color: color-mix(in srgb, var(--bootstrap-accent) 42%, transparent);
-  background: color-mix(in srgb, var(--bootstrap-accent) 10%, var(--color-surface));
+.wizardProgressStep {
+  position: relative;
+  z-index: 1;
+  flex: 0 0 auto;
+  display: inline-flex;
+  justify-content: center;
+  justify-items: center;
+  text-align: center;
+  padding: 0;
+  border: 0;
+  background: transparent;
 }
 
-.wizardStepButton:disabled {
-  opacity: 0.56;
+.wizardProgressStep:disabled {
   cursor: not-allowed;
   transform: none;
 }
 
-.wizardStepIndex {
+.wizardProgressIndex {
   width: calc(var(--control-size-md) - var(--space-2));
   height: calc(var(--control-size-md) - var(--space-2));
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  border-radius: var(--radius-pill);
-  background: color-mix(in srgb, var(--color-surface) 80%, transparent);
+  border-radius: 999px;
+  border: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
+  color: var(--color-text-muted);
+  transition:
+    border-color 160ms var(--easing-standard),
+    background 160ms var(--easing-standard),
+    color 160ms var(--easing-standard),
+    box-shadow 160ms var(--easing-standard),
+    transform 180ms var(--easing-standard);
+}
+
+.wizardProgressStep[data-active="true"] .wizardProgressIndex,
+.wizardProgressStep[data-complete="true"] .wizardProgressIndex {
+  border-color: color-mix(in srgb, var(--bootstrap-accent) 42%, transparent);
+  background: color-mix(in srgb, var(--bootstrap-accent) 12%, var(--color-surface));
   color: var(--color-text);
 }
 
-.wizardStepCopy {
-  min-width: 0;
-  display: grid;
-  gap: 0.125rem;
+.wizardProgressStep[data-active="true"] .wizardProgressIndex {
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--bootstrap-accent) 14%, transparent);
 }
 
-.wizardStepCopy strong {
-  @include text-label;
-}
-
-.wizardStepCopy small {
-  @include text-caption;
-  color: var(--color-text-muted);
+.wizardProgressStep:not(:disabled):hover .wizardProgressIndex,
+.wizardProgressStep:not(:disabled):focus-visible .wizardProgressIndex {
+  transform: translateY(-1px);
+  border-color: color-mix(in srgb, var(--bootstrap-accent) 36%, var(--color-border));
+  color: var(--color-text);
 }
 
 .wizardStepPanel {
@@ -490,7 +779,116 @@
   gap: var(--space-3);
 }
 
+.wizardFinishPanel {
+  display: grid;
+  gap: var(--space-4);
+  justify-items: stretch;
+  padding: var(--space-2) 0 0;
+  min-height: min(14rem, 32dvh);
+  align-content: center;
+}
+
+.wizardFinishShell {
+  display: grid;
+  gap: var(--space-4);
+  width: min(100%, 40rem);
+  padding: 0;
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+}
+
+.wizardFinishStatusRow {
+  display: grid;
+  grid-template-columns: auto minmax(0, 1fr);
+  gap: var(--space-3);
+  align-items: start;
+}
+
+.wizardFinishIndicator {
+  width: 2.5rem;
+  height: 2.5rem;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 999px;
+  border: 1px solid color-mix(in srgb, var(--bootstrap-accent) 18%, transparent);
+  background: color-mix(in srgb, var(--bootstrap-accent) 8%, transparent);
+}
+
+.wizardFinishIndicator[data-status="failed"] {
+  border-color: color-mix(in srgb, var(--color-danger-border, var(--color-border)) 44%, transparent);
+  background: color-mix(in srgb, var(--color-danger-surface, var(--color-surface-secondary)) 36%, transparent);
+}
+
+.wizardFinishSpinner {
+  width: 1.25rem;
+  height: 1.25rem;
+  border-radius: 999px;
+  border: 2px solid color-mix(in srgb, var(--bootstrap-accent) 18%, transparent);
+  border-top-color: var(--bootstrap-accent);
+  animation: wizardFinishSpin 900ms linear infinite;
+}
+
+.wizardFinishIndicator[data-status="failed"] .wizardFinishSpinner {
+  border: 2px solid color-mix(in srgb, var(--color-danger-border, var(--color-border)) 22%, transparent);
+  border-top-color: var(--color-danger-text, var(--color-text));
+  animation: none;
+  transform: rotate(45deg);
+  border-radius: var(--radius-sm);
+  width: 1rem;
+  height: 1rem;
+}
+
+.wizardFinishCopy {
+  display: grid;
+  gap: var(--space-1);
+  min-width: 0;
+}
+
+.wizardFinishTitle {
+  @include text-title;
+  margin: 0;
+}
+
+.wizardFinishDescription,
+.wizardFinishMessage,
+.wizardFinishHint {
+  margin: 0;
+  color: var(--color-text-muted);
+}
+
+.wizardFinishMessage[data-status="failed"] {
+  color: var(--color-danger-text, var(--color-text));
+}
+
+.wizardFinishHint {
+  @include text-caption;
+}
+
+.wizardFinishActions {
+  display: flex;
+  gap: var(--space-3);
+  flex-wrap: wrap;
+  padding-top: var(--space-1);
+}
+
+@keyframes wizardFinishSpin {
+  from {
+    transform: rotate(0deg);
+  }
+
+  to {
+    transform: rotate(360deg);
+  }
+}
+
 @include respond-down(tablet) {
+  .personaGrid {
+    grid-template-columns: 1fr;
+  }
+
   .summaryGrid,
   .wizardBody {
     grid-template-columns: 1fr;
@@ -536,21 +934,20 @@
   }
 
   .wizardHeader,
-  .wizardBody,
-  .wizardSidebar {
+  .wizardBody {
     gap: var(--space-3);
   }
 
-  .wizardSteps {
-    grid-auto-flow: column;
-    grid-auto-columns: minmax(10rem, 1fr);
+  .wizardProgressSteps {
+    justify-content: flex-start;
+    gap: var(--space-8);
     overflow-x: auto;
     padding-bottom: var(--space-1);
     scrollbar-width: thin;
   }
 
-  .wizardStepButton {
-    min-width: 10rem;
+  .wizardProgressStep {
+    min-width: calc(var(--control-size-md) - var(--space-2));
   }
 
   .wizardFormActions {

Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.parts.tsx

@@ -0,0 +1,287 @@
+// Path: Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.parts.tsx
+
+import { For, Show, type JSX } from "solid-js";
+import { CircleHelp } from "../../../lib/icons";
+import {
+	organizationalStructureDefaults,
+	workspaceHomeFieldTooltips,
+	type AdminForm,
+	type BootstrapPersona,
+	type BootstrapPersonaDefinition,
+	type BootstrapStepDefinition,
+	type BootstrapStepKey,
+	type InstanceForm,
+	type ModeForm,
+	type StructureForm,
+} from "./BootstrapWizard.data";
+import styles from "./BootstrapWizard.module.scss";
+
+type BootstrapSubmissionState = {
+	status: "idle" | "submitting" | "success" | "error";
+	error: string;
+};
+
+type MaterializationState = "not_started" | "pending" | "running" | "succeeded" | "failed";
+
+type TooltipHandlers = {
+	onShowTooltip: (target: HTMLElement, text: string) => void;
+	onHideTooltip: () => void;
+};
+
+type FieldLabelWithTooltipProps = TooltipHandlers & {
+	label: string;
+	tooltip?: string;
+};
+
+export const FieldLabelWithTooltip = (props: FieldLabelWithTooltipProps): JSX.Element => (
+	<span class={styles.fieldLabelRow}>
+		<span class={styles.fieldLabel}>{props.label}</span>
+		<Show when={props.tooltip}>
+			<button
+				type="button"
+				class={styles.fieldInfoButton}
+				aria-label={`${props.label} help: ${props.tooltip}`}
+				onMouseEnter={(event): void => props.onShowTooltip(event.currentTarget, props.tooltip!)}
+				onMouseLeave={props.onHideTooltip}
+				onFocus={(event): void => props.onShowTooltip(event.currentTarget, props.tooltip!)}
+				onBlur={props.onHideTooltip}
+			>
+				<CircleHelp size={14} strokeWidth={2} />
+			</button>
+		</Show>
+	</span>
+);
+
+type BootstrapFinishingStateProps = {
+	materializationState: MaterializationState;
+	statusLabel: string;
+	message: string;
+	isInFlight: boolean;
+	hasFailed: boolean;
+	onClose: () => void;
+};
+
+export const BootstrapFinishingState = (props: BootstrapFinishingStateProps): JSX.Element => (
+	<div class={styles.wizardFinishPanel} data-slot="bootstrap-wizard-finishing-state">
+		<div class={styles.wizardFinishShell}>
+			<div class={styles.wizardFinishStatusRow}>
+				<div class={styles.wizardFinishIndicator} data-status={props.materializationState} aria-hidden="true">
+					<div class={styles.wizardFinishSpinner} />
+				</div>
+				<div class={styles.wizardFinishCopy}>
+					<span class={styles.wizardStepEyebrow}>Bootstrap status</span>
+					<h3 class={styles.wizardFinishTitle}>Finishing setup</h3>
+					<p class={styles.wizardFinishDescription}>
+						We saved your initial bootstrap. The server is finishing the last background setup steps now.
+					</p>
+				</div>
+			</div>
+			<div class={styles.statusBadge} data-status={props.materializationState}>{props.statusLabel}</div>
+			<Show when={props.message}>
+				<p class={styles.wizardFinishMessage} data-status={props.materializationState}>{props.message}</p>
+			</Show>
+			<Show when={props.isInFlight}>
+				<p class={styles.wizardFinishHint}>This window will close automatically when setup is complete.</p>
+			</Show>
+		</div>
+		<Show when={props.hasFailed}>
+			<div class={styles.wizardFinishActions}>
+				<button type="button" class={styles.secondaryButton} onClick={props.onClose}>Close</button>
+			</div>
+		</Show>
+	</div>
+);
+
+type BootstrapWizardProgressProps = {
+	steps: readonly BootstrapStepDefinition[];
+	currentStepId: BootstrapStepKey;
+	currentWizardStepIndex: number;
+	stepState: Record<BootstrapStepKey, BootstrapSubmissionState>;
+	bootstrapStepCount: number;
+	wizardProgressFillWidth: string;
+	stepStatusLabel: (step: BootstrapStepDefinition) => string;
+	onSelectStep: (index: number) => void;
+};
+
+export const BootstrapWizardProgress = (props: BootstrapWizardProgressProps): JSX.Element => (
+	<div class={styles.wizardProgress} data-slot="bootstrap-wizard-progress">
+		<div class={styles.wizardProgressTrack} aria-hidden="true">
+			<div class={styles.wizardProgressFill} style={{ width: props.wizardProgressFillWidth }} />
+		</div>
+		<nav class={styles.wizardProgressSteps} aria-label="Bootstrap steps" style={{ "--wizard-progress-step-count": props.bootstrapStepCount }}>
+			<For each={props.steps}>
+				{(step, index): JSX.Element => (
+					<button
+						type="button"
+						class={styles.wizardProgressStep}
+						data-active={step.id === props.currentStepId ? "true" : "false"}
+						data-complete={props.stepState[step.id].status === "success" ? "true" : "false"}
+						disabled={index() > props.currentWizardStepIndex}
+						onClick={(): void => {
+							if (index() <= props.currentWizardStepIndex) {
+								props.onSelectStep(index());
+							}
+						}}
+						aria-label={`Step ${index() + 1}${props.stepStatusLabel(step) ? `, ${props.stepStatusLabel(step)}` : ""}`}
+					>
+						<span class={styles.wizardProgressIndex}>{index() + 1}</span>
+					</button>
+				)}
+			</For>
+		</nav>
+	</div>
+);
+
+type BootstrapPersonaStepProps = {
+	personas: readonly BootstrapPersonaDefinition[];
+	hasChosenPersona: boolean;
+	selectedPersona: BootstrapPersona;
+	selectedPersonaIsAvailable: boolean;
+	onSelectPersona: (persona: BootstrapPersona) => void;
+};
+
+export const BootstrapPersonaStep = (props: BootstrapPersonaStepProps): JSX.Element => (
+	<>
+		<div class={styles.personaGrid}>
+			<For each={props.personas}>
+				{(persona): JSX.Element => (
+					<button
+						type="button"
+						class={styles.personaCard}
+						data-selected={props.hasChosenPersona && persona.id === props.selectedPersona ? "true" : "false"}
+						data-available={persona.isAvailable ? "true" : "false"}
+						aria-pressed={props.hasChosenPersona && persona.id === props.selectedPersona}
+						onClick={(): void => props.onSelectPersona(persona.id)}
+					>
+						<div class={styles.personaCardMedia} aria-hidden="true" />
+						<div class={styles.personaCardBody}>
+							<h4 class={styles.personaCardTitle}>{persona.title}</h4>
+							<div class={styles.personaCardDetails}>
+								<p class={styles.personaBestFor}>{persona.bestFor}</p>
+								<ul class={styles.personaBulletList}>
+									<For each={persona.bullets}>{(bullet): JSX.Element => <li>{bullet}</li>}</For>
+								</ul>
+								<Show when={!persona.isAvailable}><p class={styles.personaAvailability}>Coming later</p></Show>
+							</div>
+						</div>
+					</button>
+				)}
+			</For>
+		</div>
+		<Show when={!props.selectedPersonaIsAvailable}>
+			<p class={styles.fieldHelp}>Only <strong>Self Hosted Enthusiast</strong> is wired up right now. The other setup paths will come next.</p>
+		</Show>
+	</>
+);
+
+type BootstrapInstanceStepProps = TooltipHandlers & {
+	instanceForm: InstanceForm;
+	onProtocolChange: (value: InstanceForm["protocol"]) => void;
+	onAccessChange: (value: InstanceForm["access"]) => void;
+	onHostChange: (value: string) => void;
+};
+
+export const BootstrapInstanceStep = (props: BootstrapInstanceStepProps): JSX.Element => (
+	<>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Protocol" tooltip={workspaceHomeFieldTooltips.protocol} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<select value={props.instanceForm.protocol} onInput={(event): void => props.onProtocolChange(event.currentTarget.value as InstanceForm["protocol"])}>
+				<option value="http">http</option>
+				<option value="https">https</option>
+			</select>
+		</label>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Access" tooltip={workspaceHomeFieldTooltips.access} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<select value={props.instanceForm.access} onInput={(event): void => props.onAccessChange(event.currentTarget.value as InstanceForm["access"])}>
+				<option value="local">local</option>
+				<option value="remote">remote</option>
+			</select>
+		</label>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Host" tooltip={workspaceHomeFieldTooltips.host} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<input type="text" value={props.instanceForm.host} onInput={(event): void => props.onHostChange(event.currentTarget.value)} placeholder="localhost or app.example.com" />
+		</label>
+	</>
+);
+
+type BootstrapModeStepProps = TooltipHandlers & {
+	modeForm: ModeForm;
+	structureForm: StructureForm;
+	usesCondensedBootstrapFlow: boolean;
+	selectedPersona: BootstrapPersona;
+	namePlaceholder: string;
+	onNameChange: (value: string) => void;
+	onProjectNameChange: (value: string) => void;
+	onTeamNameChange: (value: string) => void;
+};
+
+export const BootstrapModeStep = (props: BootstrapModeStepProps): JSX.Element => (
+	<>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Server name" tooltip={workspaceHomeFieldTooltips.serverName} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<input type="text" value={props.modeForm.name} required onInput={(event): void => props.onNameChange(event.currentTarget.value)} placeholder={props.namePlaceholder} />
+		</label>
+		<Show when={props.usesCondensedBootstrapFlow}>
+			<label class={styles.field}>
+				<FieldLabelWithTooltip label="Default Project" tooltip={workspaceHomeFieldTooltips.project} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+				<input type="text" value={props.structureForm.projectName} onInput={(event): void => props.onProjectNameChange(event.currentTarget.value)} placeholder="Project" />
+			</label>
+		</Show>
+		<Show when={props.selectedPersona === "team"}>
+			<label class={styles.field}>
+				<FieldLabelWithTooltip label="Team name" tooltip={workspaceHomeFieldTooltips.team} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+				<input type="text" value={props.structureForm.teamName} onInput={(event): void => props.onTeamNameChange(event.currentTarget.value)} placeholder="Core Team" />
+			</label>
+		</Show>
+	</>
+);
+
+type BootstrapAdminStepProps = {
+	adminForm: AdminForm;
+	onDisplayNameChange: (value: string) => void;
+	onEmailChange: (value: string) => void;
+	onPasswordChange: (value: string) => void;
+};
+
+export const BootstrapAdminStep = (props: BootstrapAdminStepProps): JSX.Element => (
+	<>
+		<label class={styles.field}>
+			<span class={styles.fieldLabel}>Display name</span>
+			<input type="text" value={props.adminForm.displayName} onInput={(event): void => props.onDisplayNameChange(event.currentTarget.value)} placeholder="Admin" />
+		</label>
+		<label class={styles.field}>
+			<span class={styles.fieldLabel}>Email</span>
+			<input type="email" value={props.adminForm.email} onInput={(event): void => props.onEmailChange(event.currentTarget.value)} placeholder="admin@example.com" />
+		</label>
+		<label class={styles.field}>
+			<span class={styles.fieldLabel}>Password</span>
+			<input type="password" value={props.adminForm.password} onInput={(event): void => props.onPasswordChange(event.currentTarget.value)} placeholder="Create a strong password" />
+			<small class={styles.fieldHelp}>Use at least 12 characters with uppercase, lowercase, numbers, and symbols.</small>
+		</label>
+	</>
+);
+
+type BootstrapStructureStepProps = TooltipHandlers & {
+	mode: ModeForm["mode"];
+	structureForm: StructureForm;
+	onDepartmentNameChange: (value: string) => void;
+	onTeamNameChange: (value: string) => void;
+	onProjectNameChange: (value: string) => void;
+};
+
+export const BootstrapStructureStep = (props: BootstrapStructureStepProps): JSX.Element => (
+	<>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Department" tooltip={workspaceHomeFieldTooltips.department} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<input type="text" value={props.structureForm.departmentName} disabled={props.mode === "personal"} onInput={(event): void => props.onDepartmentNameChange(event.currentTarget.value)} placeholder={organizationalStructureDefaults.departmentName} />
+		</label>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Team" tooltip={workspaceHomeFieldTooltips.team} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<input type="text" value={props.structureForm.teamName} disabled={props.mode === "personal"} onInput={(event): void => props.onTeamNameChange(event.currentTarget.value)} placeholder={organizationalStructureDefaults.teamName} />
+		</label>
+		<label class={styles.field}>
+			<FieldLabelWithTooltip label="Project" tooltip={workspaceHomeFieldTooltips.project} onShowTooltip={props.onShowTooltip} onHideTooltip={props.onHideTooltip} />
+			<input type="text" value={props.structureForm.projectName} onInput={(event): void => props.onProjectNameChange(event.currentTarget.value)} placeholder="Moku" />
+		</label>
+	</>
+);

Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizard.tsx

@@ -0,0 +1,107 @@
+import { type JSX } from "solid-js";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import { useBootstrapWizard } from "./BootstrapWizard.hook";
+import { BootstrapWizardDialog } from "./BootstrapWizardDialog";
+
+export const BootstrapWizard = (): JSX.Element => {
+	const appShellData = useAppShellData();
+	const {
+		instanceForm,
+		setInstanceForm,
+		modeForm,
+		setModeForm,
+		adminForm,
+		setAdminForm,
+		structureForm,
+		setStructureForm,
+		selectedPersona,
+		hasChosenPersona,
+		stepState,
+		isBootstrapStateResolved,
+		isWizardOpen,
+		setIsWizardOpen,
+		setIsFinishingBootstrapFlow,
+		fieldTooltip,
+		materializationState,
+		isMaterializationInFlight,
+		hasMaterializationFailed,
+		showBootstrapFinishingState,
+		materializationStatusLabel,
+		materializationMessage,
+		selectedPersonaIsAvailable,
+		usesCondensedBootstrapFlow,
+		activeWizardSteps,
+		bootstrapNamePlaceholder,
+		bootstrapStepCount,
+		currentStep,
+		currentWizardStepIndex,
+		wizardProgressFillWidth,
+		currentStepState,
+		isFirstStep,
+		canDismissWizard,
+		handleCurrentStepSubmit,
+		applyPersonaSelection,
+		statusLabel,
+		showFieldTooltip,
+		hideFieldTooltip,
+		stepStatusLabel,
+		navigateBack,
+		navigateToVisibleStep,
+	} = useBootstrapWizard(appShellData);
+
+	return (
+		<BootstrapWizardDialog
+			isOpen={isBootstrapStateResolved() && isWizardOpen()}
+			currentStep={currentStep()}
+			currentStepState={currentStepState()}
+			activeWizardSteps={activeWizardSteps()}
+			currentWizardStepIndex={currentWizardStepIndex()}
+			stepState={stepState}
+			bootstrapStepCount={bootstrapStepCount()}
+			wizardProgressFillWidth={wizardProgressFillWidth()}
+			showBootstrapFinishingState={showBootstrapFinishingState()}
+			materializationState={materializationState()}
+			materializationStatusLabel={materializationStatusLabel()}
+			materializationMessage={materializationMessage()}
+			isMaterializationInFlight={isMaterializationInFlight()}
+			hasMaterializationFailed={hasMaterializationFailed()}
+			instanceForm={instanceForm}
+			modeForm={modeForm}
+			adminForm={adminForm}
+			structureForm={structureForm}
+			selectedPersona={selectedPersona()}
+			hasChosenPersona={hasChosenPersona()}
+			selectedPersonaIsAvailable={selectedPersonaIsAvailable()}
+			usesCondensedBootstrapFlow={usesCondensedBootstrapFlow()}
+			bootstrapNamePlaceholder={bootstrapNamePlaceholder()}
+			isFirstStep={isFirstStep()}
+			canDismissWizard={canDismissWizard()}
+			fieldTooltip={fieldTooltip()}
+			onClose={(): void => {
+				setIsWizardOpen(false);
+			}}
+			onCloseFinishingState={(): void => {
+				setIsFinishingBootstrapFlow(false);
+				setIsWizardOpen(false);
+			}}
+			onSubmit={handleCurrentStepSubmit}
+			onSelectPersona={applyPersonaSelection}
+			onProtocolChange={(value): void => setInstanceForm("protocol", value)}
+			onAccessChange={(value): void => setInstanceForm("access", value)}
+			onHostChange={(value): void => setInstanceForm("host", value)}
+			onModeNameChange={(value): void => setModeForm("name", value)}
+			onProjectNameChange={(value): void => setStructureForm("projectName", value)}
+			onTeamNameChange={(value): void => setStructureForm("teamName", value)}
+			onAdminDisplayNameChange={(value): void => setAdminForm("displayName", value)}
+			onAdminEmailChange={(value): void => setAdminForm("email", value)}
+			onAdminPasswordChange={(value): void => setAdminForm("password", value)}
+			onDepartmentNameChange={(value): void => setStructureForm("departmentName", value)}
+			onShowTooltip={showFieldTooltip}
+			onHideTooltip={hideFieldTooltip}
+			statusLabel={statusLabel}
+			stepStatusLabel={stepStatusLabel}
+			onNavigateBack={navigateBack}
+			onSelectStep={navigateToVisibleStep}
+		/>
+	);
+};

Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizardDialog.tsx

@@ -0,0 +1,234 @@
+// Path: Frontend/src/components/bootstrap/BootstrapWizard/BootstrapWizardDialog.tsx
+
+import { Show, type JSX } from "solid-js";
+import { Portal } from "solid-js/web";
+import {
+	type AdminForm,
+	type BootstrapPersona,
+	bootstrapPersonaDefinitions,
+	type BootstrapStepDefinition,
+	type BootstrapStepKey,
+	type InstanceForm,
+	type ModeForm,
+	type StructureForm,
+} from "./BootstrapWizard.data";
+import { type BootstrapSubmissionState, type FieldTooltipState, type MaterializationState } from "./BootstrapWizard.hook";
+import {
+	BootstrapAdminStep,
+	BootstrapFinishingState,
+	BootstrapInstanceStep,
+	BootstrapModeStep,
+	BootstrapPersonaStep,
+	BootstrapStructureStep,
+	BootstrapWizardProgress,
+} from "./BootstrapWizard.parts";
+import styles from "./BootstrapWizard.module.scss";
+
+export type BootstrapWizardDialogProps = {
+	isOpen: boolean;
+	currentStep: BootstrapStepDefinition;
+	currentStepState: BootstrapSubmissionState;
+	activeWizardSteps: readonly BootstrapStepDefinition[];
+	currentWizardStepIndex: number;
+	stepState: Record<BootstrapStepKey, BootstrapSubmissionState>;
+	bootstrapStepCount: number;
+	wizardProgressFillWidth: string;
+	showBootstrapFinishingState: boolean;
+	materializationState: MaterializationState;
+	materializationStatusLabel: string;
+	materializationMessage: string;
+	isMaterializationInFlight: boolean;
+	hasMaterializationFailed: boolean;
+	instanceForm: InstanceForm;
+	modeForm: ModeForm;
+	adminForm: AdminForm;
+	structureForm: StructureForm;
+	selectedPersona: BootstrapPersona;
+	hasChosenPersona: boolean;
+	selectedPersonaIsAvailable: boolean;
+	usesCondensedBootstrapFlow: boolean;
+	bootstrapNamePlaceholder: string;
+	isFirstStep: boolean;
+	canDismissWizard: boolean;
+	fieldTooltip: FieldTooltipState | null;
+	onClose: () => void;
+	onCloseFinishingState: () => void;
+	onSubmit: JSX.EventHandlerUnion<HTMLFormElement, SubmitEvent>;
+	onSelectPersona: (persona: BootstrapPersona) => void;
+	onProtocolChange: (value: InstanceForm["protocol"]) => void;
+	onAccessChange: (value: InstanceForm["access"]) => void;
+	onHostChange: (value: string) => void;
+	onModeNameChange: (value: string) => void;
+	onProjectNameChange: (value: string) => void;
+	onTeamNameChange: (value: string) => void;
+	onAdminDisplayNameChange: (value: string) => void;
+	onAdminEmailChange: (value: string) => void;
+	onAdminPasswordChange: (value: string) => void;
+	onDepartmentNameChange: (value: string) => void;
+	onShowTooltip: (target: HTMLElement, text: string) => void;
+	onHideTooltip: () => void;
+	statusLabel: (state: BootstrapSubmissionState) => string;
+	stepStatusLabel: (step: BootstrapStepDefinition) => string;
+	onNavigateBack: () => void;
+	onSelectStep: (index: number) => void;
+};
+
+export const BootstrapWizardDialog = (props: BootstrapWizardDialogProps): JSX.Element => (
+	<Show when={props.isOpen}>
+		<Portal>
+			<div class={styles.wizardLayer} data-ui="bootstrap-wizard" data-step={props.currentStep.id}>
+				<div class={styles.wizardBackdrop} aria-hidden="true" />
+
+				<section class={styles.wizardPanel} role="dialog" aria-modal="true" aria-labelledby="bootstrap-wizard-title" data-slot="bootstrap-wizard-panel">
+					<header class={styles.wizardHeader} data-slot="bootstrap-wizard-header">
+						<div class={styles.wizardHeaderCopy}>
+							<h2 id="bootstrap-wizard-title" class={styles.wizardTitle}>
+								Bootstrap Server
+							</h2>
+						</div>
+						<Show when={props.canDismissWizard}>
+							<button type="button" class={styles.wizardCloseButton} onClick={props.onClose}>
+								Close
+							</button>
+						</Show>
+					</header>
+
+					<Show
+						when={!props.showBootstrapFinishingState}
+						fallback={
+							<BootstrapFinishingState
+								materializationState={props.materializationState}
+								statusLabel={props.materializationStatusLabel}
+								message={props.materializationMessage}
+								isInFlight={props.isMaterializationInFlight}
+								hasFailed={props.hasMaterializationFailed}
+								onClose={props.onCloseFinishingState}
+							/>
+						}
+					>
+						<div class={styles.wizardBody}>
+							<Show when={props.currentStep.id !== "persona"}>
+								<BootstrapWizardProgress
+									steps={props.activeWizardSteps}
+									currentStepId={props.currentStep.id}
+									currentWizardStepIndex={props.currentWizardStepIndex}
+									stepState={props.stepState}
+									bootstrapStepCount={props.bootstrapStepCount}
+									wizardProgressFillWidth={props.wizardProgressFillWidth}
+									stepStatusLabel={props.stepStatusLabel}
+									onSelectStep={props.onSelectStep}
+								/>
+							</Show>
+
+							<div class={styles.wizardStepPanel} data-slot="bootstrap-wizard-step-panel">
+								<Show when={props.currentStep.id !== "persona" || props.statusLabel(props.currentStepState)}>
+									<div class={styles.sectionHeader}>
+										<Show when={props.currentStep.id !== "persona"}>
+											<div>
+												<span class={styles.wizardStepEyebrow}>{`Step ${props.currentWizardStepIndex + 1} of ${props.bootstrapStepCount}`}</span>
+											</div>
+										</Show>
+										<Show when={props.statusLabel(props.currentStepState)}>
+											<div class={styles.statusBadge} data-status={props.currentStepState.status}>
+												{props.statusLabel(props.currentStepState)}
+											</div>
+										</Show>
+									</div>
+								</Show>
+
+								<form class={styles.form} onSubmit={props.onSubmit}>
+									<Show when={props.currentStep.id === "persona"}>
+										<BootstrapPersonaStep
+											personas={bootstrapPersonaDefinitions}
+											hasChosenPersona={props.hasChosenPersona}
+											selectedPersona={props.selectedPersona}
+											selectedPersonaIsAvailable={props.selectedPersonaIsAvailable}
+											onSelectPersona={props.onSelectPersona}
+										/>
+									</Show>
+
+									<Show when={props.currentStep.id === "instance"}>
+										<BootstrapInstanceStep
+											instanceForm={props.instanceForm}
+											onProtocolChange={props.onProtocolChange}
+											onAccessChange={props.onAccessChange}
+											onHostChange={props.onHostChange}
+											onShowTooltip={props.onShowTooltip}
+											onHideTooltip={props.onHideTooltip}
+										/>
+									</Show>
+
+									<Show when={props.currentStep.id === "mode"}>
+										<BootstrapModeStep
+											modeForm={props.modeForm}
+											structureForm={props.structureForm}
+											usesCondensedBootstrapFlow={props.usesCondensedBootstrapFlow}
+											selectedPersona={props.selectedPersona}
+											namePlaceholder={props.bootstrapNamePlaceholder}
+											onNameChange={props.onModeNameChange}
+											onProjectNameChange={props.onProjectNameChange}
+											onTeamNameChange={props.onTeamNameChange}
+											onShowTooltip={props.onShowTooltip}
+											onHideTooltip={props.onHideTooltip}
+										/>
+									</Show>
+
+									<Show when={props.currentStep.id === "admin"}>
+										<BootstrapAdminStep
+											adminForm={props.adminForm}
+											onDisplayNameChange={props.onAdminDisplayNameChange}
+											onEmailChange={props.onAdminEmailChange}
+											onPasswordChange={props.onAdminPasswordChange}
+										/>
+									</Show>
+
+									<Show when={props.currentStep.id === "structure"}>
+										<BootstrapStructureStep
+											mode={props.modeForm.mode}
+											structureForm={props.structureForm}
+											onDepartmentNameChange={props.onDepartmentNameChange}
+											onTeamNameChange={props.onTeamNameChange}
+											onProjectNameChange={props.onProjectNameChange}
+											onShowTooltip={props.onShowTooltip}
+											onHideTooltip={props.onHideTooltip}
+										/>
+									</Show>
+
+									<Show when={props.currentStep.id !== "persona"}>
+										<div class={styles.wizardFormActions}>
+											<button type="button" class={styles.secondaryButton} disabled={props.isFirstStep} onClick={props.onNavigateBack}>
+												Back
+											</button>
+											<button type="submit" class={styles.primaryButton} disabled={props.currentStepState.status === "submitting"}>
+												{props.currentStep.buttonLabel}
+											</button>
+										</div>
+									</Show>
+								</form>
+
+								<Show when={props.currentStepState.error}>
+									<p class={styles.errorText}>{props.currentStepState.error}</p>
+								</Show>
+							</div>
+						</div>
+					</Show>
+				</section>
+
+				<Show when={props.fieldTooltip}>
+					{(tooltip): JSX.Element => (
+						<div
+							class={styles.fieldTooltip}
+							data-placement={tooltip().placement}
+							style={{
+								left: `${tooltip().left}px`,
+								top: `${tooltip().top}px`,
+							}}
+						>
+							<div class={styles.fieldTooltipBubble}>{tooltip().text}</div>
+						</div>
+					)}
+				</Show>
+			</div>
+		</Portal>
+	</Show>
+);

Frontend/src/components/bootstrap/BootstrapWizard/bootstrapWizard.api.ts

@@ -0,0 +1,81 @@
+import { resolveAPIBase } from "../../../lib/api";
+import type { BootstrapStepKey } from "./BootstrapWizard.data";
+
+const readBootstrapResponseBody = async (response: Response): Promise<unknown> => {
+	const raw = await response.text();
+
+	if (!raw.trim()) {
+		return null;
+	}
+
+	try {
+		return JSON.parse(raw);
+	} catch {
+		return raw;
+	}
+};
+
+const readBootstrapResponseError = (step: BootstrapStepKey, data: unknown): string => {
+	const fallback = `Bootstrap ${step} request failed.`;
+
+	if (typeof data === "string") {
+		const message = data.trim();
+		return message || fallback;
+	}
+
+	if (!data || typeof data !== "object") {
+		return fallback;
+	}
+
+	const record = data as {
+		error?: string;
+		message?: string;
+		requestId?: string;
+	};
+	const message = typeof record.message === "string" ? record.message.trim() : "";
+	const errorCode = typeof record.error === "string" ? record.error.trim() : "";
+	const requestId = typeof record.requestId === "string" ? record.requestId.trim() : "";
+
+	if (!message && !errorCode && !requestId) {
+		return fallback;
+	}
+
+	const details: string[] = [];
+
+	if (errorCode) {
+		details.push(`code: ${errorCode}`);
+	}
+
+	if (requestId) {
+		details.push(`request: ${requestId}`);
+	}
+
+	if (message && details.length > 0) {
+		return `${message} (${details.join(", ")})`;
+	}
+
+	if (message) {
+		return message;
+	}
+
+	return `${fallback} (${details.join(", ")})`;
+};
+
+export const submitBootstrapStepRequest = async (
+	step: BootstrapStepKey,
+	payload: unknown,
+): Promise<void> => {
+	const response = await fetch(`${resolveAPIBase()}/bootstrap/steps/${step}`, {
+		method: "POST",
+		headers: {
+			"Content-Type": "application/json",
+			Accept: "application/json",
+		},
+		body: JSON.stringify(payload),
+	});
+	const data = await readBootstrapResponseBody(response);
+
+	if (!response.ok) {
+		throw new Error(readBootstrapResponseError(step, data));
+	}
+};

Frontend/src/components/shell/MobileWorkspaceBrowser/MobileWorkspaceBrowser.module.scss

@@ -1,190 +0,0 @@
-.browserLayer {
-  display: none;
-}
-
-@include respond-down(mobile) {
-  .browserLayer {
-    position: fixed;
-    inset: 0;
-    display: grid;
-    z-index: calc(var(--z-popover, 20) + 2);
-    background: color-mix(in srgb, var(--color-canvas) 96%, black 4%);
-  }
-
-	.sheet {
-    min-height: 100dvh;
-    display: grid;
-    grid-template-rows: auto minmax(0, 1fr);
-    background:
-      linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 84%, transparent) 0%, transparent 8rem),
-      color-mix(in srgb, var(--color-canvas) 97%, black 3%);
-    overflow: clip;
-  }
-
-  .sheetHeader {
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
-    gap: var(--space-3);
-    padding: calc(var(--space-5) + env(safe-area-inset-top, 0px)) var(--space-4) var(--space-4);
-    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 84%, transparent);
-  }
-
-  .headerActions {
-    display: inline-flex;
-    align-items: center;
-    gap: var(--space-2);
-  }
-
-  .brandBlock {
-    min-width: 0;
-    display: grid;
-    gap: var(--space-1);
-  }
-
-  .sectionLabel {
-    @include text-caption;
-    color: var(--color-text-muted);
-    text-transform: uppercase;
-    letter-spacing: 0.06em;
-  }
-
-  .brandEyebrow {
-    @include text-caption;
-    color: var(--color-text-muted);
-    text-transform: uppercase;
-    letter-spacing: 0.08em;
-  }
-
-  .brandTitle {
-    @include text-title;
-    color: var(--color-text);
-    font-weight: var(--font-weight-semibold);
-  }
-
-  .brandContext {
-    @include text-caption;
-    color: var(--color-text-subtle);
-  }
-
-  .closeButton {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    width: var(--control-size-md);
-    height: var(--control-size-md);
-    padding: 0;
-    border: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
-    border-radius: 999px;
-    background: color-mix(in srgb, var(--color-surface) 92%, transparent);
-    color: var(--color-text-subtle);
-  }
-
-  .createButton {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    gap: var(--space-2);
-    min-height: var(--control-size-md);
-    padding: 0 var(--space-3);
-    border: 1px solid color-mix(in srgb, var(--color-border-strong, var(--color-border)) 82%, transparent);
-    border-radius: 999px;
-    background: color-mix(in srgb, var(--color-surface) 94%, var(--color-canvas) 6%);
-    color: var(--color-text);
-    box-shadow: var(--shadow-soft);
-    font: inherit;
-    font-weight: var(--font-weight-semibold);
-  }
-
-  .sheetBody {
-    min-height: 0;
-    display: grid;
-    gap: var(--space-5);
-    padding: var(--space-5) var(--space-5) calc(var(--space-12) + var(--space-10) + env(safe-area-inset-bottom, 0px));
-    overflow: auto;
-  }
-
-  .sectionBlock {
-    display: grid;
-    gap: var(--space-2);
-  }
-
-  .treeList,
-  .treeListItem {
-    list-style: none;
-    margin: 0;
-    padding: 0;
-  }
-
-  .treeList {
-    display: grid;
-    gap: 0;
-    border-top: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
-  }
-
-  .treeListNested {
-    display: grid;
-    gap: 0;
-  }
-
-  .treeRow {
-    min-width: 0;
-    width: 100%;
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
-    gap: var(--space-3);
-    min-height: calc(var(--control-size-lg) + var(--space-3));
-    padding: var(--space-4) var(--space-2) var(--space-4) calc(var(--space-2) + (var(--tree-depth, 0) * var(--space-4)));
-    border: 0;
-    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
-    border-radius: 0;
-    background: transparent;
-    color: var(--color-text);
-    text-align: left;
-  }
-
-  .treeRowActive {
-    color: var(--color-text);
-    background: color-mix(in srgb, var(--color-surface) 72%, transparent);
-  }
-
-  .treeRowBranch {
-    font-weight: var(--font-weight-semibold);
-  }
-
-  .treeRowLead,
-  .treeRowTrail {
-    min-width: 0;
-    display: inline-flex;
-    align-items: center;
-    gap: var(--space-2);
-  }
-
-  .treeRowTrail {
-    flex: 0 0 auto;
-    color: var(--color-text-muted);
-  }
-
-  .treeLabel {
-    @include text-label;
-    min-width: 0;
-    overflow: hidden;
-    text-overflow: ellipsis;
-    white-space: nowrap;
-  }
-
-  .treeMeta {
-    @include text-caption;
-    min-width: 1rem;
-    text-align: right;
-  }
-
-  .treeChevron {
-    color: var(--color-text-subtle);
-  }
-
-  .treeListNested > .treeListItem > .treeRow {
-    min-height: calc(var(--control-size-lg) + var(--space-1));
-  }
-}

Frontend/src/components/shell/MobileWorkspaceBrowser/MobileWorkspaceBrowser.tsx

@@ -1,247 +0,0 @@
-import { For, Show, createSignal, type JSX } from "solid-js";
-import { ChevronRight, Plus, X } from "../../../lib/icons";
-import { useAppShellData } from "../data/app-shell.context";
-import { createLongPressGesture } from "../createLongPressGesture";
-import {
-	createWorkspaceStaticTarget,
-	createWorkspaceSurfaceTarget,
-	createWorkspaceTreeTarget,
-	getWorkspaceNodeIcon,
-	workspaceStaticItems,
-	type SidebarItem,
-	type WorkspaceContextMenuAction,
-	type WorkspaceContextMenuTarget,
-	type WorkspaceStaticItem,
-	type WorkspaceTreeNode,
-} from "../data/shell.data";
-import { WorkspaceMobileActionSheet } from "../WorkspaceMobileActionSheet/WorkspaceMobileActionSheet";
-import styles from "./MobileWorkspaceBrowser.module.scss";
-
-type MobileWorkspaceBrowserProps = {
-	open: boolean;
-	onClose: VoidFunction;
-};
-
-const TreeRow = (props: { node: WorkspaceTreeNode; depth?: number }): JSX.Element => {
-	const depth = props.depth ?? 0;
-	const Icon = getWorkspaceNodeIcon(props.node);
-	const hasChildren = (props.node.children?.length ?? 0) > 0;
-
-	return (
-		<button
-			classList={{
-				[styles.treeRow]: true,
-				[styles.treeRowActive]: props.node.active ?? false,
-				[styles.treeRowBranch]: hasChildren,
-			}}
-			type="button"
-			style={{ "--tree-depth": `${depth}` }}
-			data-slot="mobile-workspace-tree-row"
-			data-kind={props.node.kind}
-			data-item-type={props.node.kind === "item" ? props.node.itemType : undefined}
-			data-active={props.node.active ? "true" : "false"}
-		>
-			<span class={styles.treeRowLead}>
-				<Icon size={16} strokeWidth={2} />
-				<span class={styles.treeLabel}>{props.node.label}</span>
-			</span>
-
-			<span class={styles.treeRowTrail}>
-				<Show when={props.node.meta}>
-					<span class={styles.treeMeta}>{props.node.meta}</span>
-				</Show>
-				<Show when={hasChildren}>
-					<ChevronRight size={14} strokeWidth={2} class={styles.treeChevron} />
-				</Show>
-			</span>
-		</button>
-	);
-};
-
-const StaticRow = (props: { item: SidebarItem }): JSX.Element => {
-	const Icon = props.item.icon;
-
-	return (
-		<button classList={{ [styles.treeRow]: true, [styles.treeRowActive]: props.item.active ?? false }} type="button" style={{ "--tree-depth": "0" }} data-slot="mobile-workspace-static-row" data-active={props.item.active ? "true" : "false"}>
-			<span class={styles.treeRowLead}>
-				<Icon size={16} strokeWidth={2} />
-				<span class={styles.treeLabel}>{props.item.label}</span>
-			</span>
-			<span class={styles.treeRowTrail}>
-				<Show when={props.item.meta}>
-					<span class={styles.treeMeta}>{props.item.meta}</span>
-				</Show>
-				<ChevronRight size={14} strokeWidth={2} class={styles.treeChevron} />
-			</span>
-		</button>
-	);
-};
-const WorkspaceStaticRow = (props: {
-	item: WorkspaceStaticItem;
-	onOpenActionSheet: (target: WorkspaceContextMenuTarget) => void;
-}): JSX.Element => {
-	const target = createWorkspaceStaticTarget(props.item);
-	const longPress = createLongPressGesture({
-		onLongPress: () => {
-			props.onOpenActionSheet(target);
-		},
-	});
-
-	return (
-		<li
-			class={styles.treeListItem}
-			data-slot="mobile-workspace-static-item"
-			data-target-kind={target.kind}
-			onContextMenu={(event): void => {
-				event.preventDefault();
-				props.onOpenActionSheet(target);
-			}}
-			{...longPress}
-		>
-			<StaticRow item={props.item} />
-		</li>
-	);
-};
-
-const WorkspaceTreeBranch = (props: {
-	nodes: readonly WorkspaceTreeNode[];
-	depth?: number;
-	onOpenActionSheet: (target: WorkspaceContextMenuTarget) => void;
-}): JSX.Element => {
-	const depth = props.depth ?? 0;
-
-	return (
-		<For each={props.nodes}>
-			{(node): JSX.Element => {
-				const target = createWorkspaceTreeTarget(node);
-				const longPress = createLongPressGesture({
-					onLongPress: () => {
-						props.onOpenActionSheet(target);
-					},
-				});
-
-				return (
-					<li
-						class={styles.treeListItem}
-						data-slot="mobile-workspace-tree-item"
-						data-kind={node.kind}
-						data-item-type={node.kind === "item" ? node.itemType : undefined}
-						onContextMenu={(event): void => {
-							event.preventDefault();
-							props.onOpenActionSheet(target);
-						}}
-						{...longPress}
-					>
-						<TreeRow node={node} depth={depth} />
-
-						<Show when={node.children?.length}>
-							<ul class={styles.treeListNested}>
-								<WorkspaceTreeBranch nodes={node.children ?? []} depth={depth + 1} onOpenActionSheet={props.onOpenActionSheet} />
-							</ul>
-						</Show>
-					</li>
-				);
-			}}
-		</For>
-	);
-};
-
-export const MobileWorkspaceBrowser = (props: MobileWorkspaceBrowserProps): JSX.Element => {
-	const appShellData = useAppShellData();
-	const [actionSheetTarget, setActionSheetTarget] = createSignal<WorkspaceContextMenuTarget | null>(null);
-	const sectionNodes = () => appShellData.workspaceTree().filter((node) => (node.children?.length ?? 0) > 0);
-	const looseNodes = () => appShellData.workspaceTree().filter((node) => (node.children?.length ?? 0) === 0);
-	const workspaceTarget = () => createWorkspaceSurfaceTarget(appShellData.activeProject());
-	const openActionSheet = (target: WorkspaceContextMenuTarget): void => {
-		setActionSheetTarget(target);
-	};
-	const closeActionSheet = (): void => {
-		setActionSheetTarget(null);
-	};
-	const openWorkspaceActionSheet = (): void => {
-		openActionSheet(workspaceTarget());
-	};
-
-	const handleActionSelect = (_action: WorkspaceContextMenuAction, _target: WorkspaceContextMenuTarget): void => {
-		// Mobile first pass only establishes the action-sheet IA and long-press behavior.
-	};
-
-	const workspaceLongPress = createLongPressGesture({
-		onLongPress: openWorkspaceActionSheet,
-	});
-
-	return (
-		<Show when={props.open}>
-			<div class={styles.browserLayer} data-ui="mobile-workspace-browser">
-				<section class={styles.sheet} aria-label="Mobile workspace browser" data-slot="mobile-workspace-sheet">
-					<header class={styles.sheetHeader} data-slot="mobile-workspace-header">
-						<div
-							class={styles.brandBlock}
-							data-slot="mobile-workspace-brand"
-							onContextMenu={(event): void => {
-								event.preventDefault();
-								openWorkspaceActionSheet();
-							}}
-							{...workspaceLongPress}
-						>
-							{/* Long-pressing the browser header exposes workspace-level actions on mobile. */}
-							<span class={styles.brandEyebrow}>Moku Work</span>
-							<strong class={styles.brandTitle}>{appShellData.activeProject().name}</strong>
-							<span class={styles.brandContext}>{appShellData.activeServer().name}</span>
-						</div>
-
-						<div class={styles.headerActions} data-slot="mobile-workspace-header-actions">
-							<button
-								class={styles.createButton}
-								type="button"
-								aria-label="Create"
-								data-slot="mobile-workspace-create"
-								onClick={openWorkspaceActionSheet}
-							>
-								<Plus size={16} strokeWidth={2.25} />
-								<span>Create</span>
-							</button>
-
-							<button class={styles.closeButton} type="button" aria-label="Close workspace browser" data-slot="mobile-workspace-close" onClick={props.onClose}>
-								<X size={18} strokeWidth={2} />
-							</button>
-						</div>
-					</header>
-
-					<div class={styles.sheetBody} data-slot="mobile-workspace-body">
-						<section class={styles.sectionBlock} data-slot="mobile-workspace-section" data-section-id="workspace">
-							<span class={styles.sectionLabel}>Workspace</span>
-							<ul class={styles.treeList} data-slot="mobile-workspace-list" data-section-id="workspace">
-						<For each={workspaceStaticItems}>
-							{(item): JSX.Element => <WorkspaceStaticRow item={item} onOpenActionSheet={openActionSheet} />}
-						</For>
-							</ul>
-						</section>
-
-						<section class={styles.sectionBlock} data-slot="mobile-workspace-section" data-section-id="items">
-							<span class={styles.sectionLabel}>Items</span>
-							<ul class={styles.treeList} data-slot="mobile-workspace-list" data-section-id="items">
-								<WorkspaceTreeBranch nodes={sectionNodes()} onOpenActionSheet={openActionSheet} />
-							</ul>
-						</section>
-
-						<Show when={looseNodes().length > 0}>
-							<section class={styles.sectionBlock} data-slot="mobile-workspace-section" data-section-id="more">
-								<span class={styles.sectionLabel}>More</span>
-								<ul class={styles.treeList} data-slot="mobile-workspace-list" data-section-id="more">
-									<WorkspaceTreeBranch nodes={looseNodes()} onOpenActionSheet={openActionSheet} />
-								</ul>
-							</section>
-						</Show>
-					</div>
-				</section>
-
-				<WorkspaceMobileActionSheet
-					target={actionSheetTarget()}
-					onClose={closeActionSheet}
-					onSelect={handleActionSelect}
-				/>
-			</div>
-		</Show>
-	);
-};

Frontend/src/components/shell/ProjectSelector/ProjectSelector.tsx

@@ -1,913 +0,0 @@
-// Path: Frontend/src/components/shell/ProjectSelector/ProjectSelector.tsx
-
-import { For, Show, createEffect, createSignal, onCleanup, onMount, type JSX } from "solid-js";
-import { ChevronDown, ChevronRight, Folder, LayoutGrid } from "../../../lib/icons";
-import { ProjectContextMenu } from "../ProjectContextMenu/ProjectContextMenu";
-import { useAppShellData } from "../data/app-shell.context";
-import {
-	createProjectFolderTarget,
-	createProjectSurfaceTarget,
-	createProjectTarget,
-	type ProjectItem,
-	type ProjectMenuTarget,
-} from "../data/shell.data";
-import { createProjectContextMenuController } from "../ProjectContextMenu/createProjectContextMenuController";
-import styles from "./ProjectSelector.module.scss";
-
-type ProjectSelectorProps = {
-	compact?: boolean;
-	isOpen: boolean;
-	onToggle: () => void;
-	onClose: () => void;
-};
-
-type ProjectFolderNode = {
-	kind: "folder";
-	id: string;
-	label: string;
-	meta?: string;
-	children: ProjectTreeNode[];
-};
-
-type ProjectLeafNode = {
-	kind: "project";
-	item: ProjectItem;
-};
-
-type ProjectTreeNode = ProjectFolderNode | ProjectLeafNode;
-
-type PendingProjectFolderDraft = {
-	parentId: string | null;
-	depth: number;
-};
-
-type ProjectDragTarget = {
-	parentId: string | null;
-	index: number;
-	intent: "before" | "after" | "inside";
-	targetNodeId?: string;
-};
-
-type ProjectDragState = {
-	draggedNodeId: string;
-	dropTarget: ProjectDragTarget | null;
-};
-
-type ProjectNodeLocation = {
-	parentId: string | null;
-	index: number;
-	node: ProjectTreeNode;
-};
-
-const LONG_PRESS_MS = 320;
-
-const createProjectFolderId = (): string => `project-folder-${Math.random().toString(36).slice(2, 10)}`;
-
-const getProjectTreeNodeId = (node: ProjectTreeNode): string =>
-	node.kind === "folder" ? node.id : node.item.id;
-
-const buildProjectTree = (items: readonly ProjectItem[]): ProjectTreeNode[] =>
-	items.map((item) => ({
-		kind: "project",
-		item,
-	}));
-
-const cloneProjectTreeNode = (node: ProjectTreeNode): ProjectTreeNode => {
-	if (node.kind === "project") {
-		return {
-			kind: "project",
-			item: { ...node.item },
-		};
-	}
-
-	return {
-		kind: "folder",
-		id: node.id,
-		label: node.label,
-		meta: node.meta,
-		children: node.children.map(cloneProjectTreeNode),
-	};
-};
-
-const insertProjectFolderNode = (
-	nodes: readonly ProjectTreeNode[],
-	parentId: string | null,
-	folder: ProjectFolderNode,
-): ProjectTreeNode[] => {
-	if (parentId === null) {
-		return [...nodes, folder];
-	}
-
-	return nodes.map((node) => {
-		if (node.kind !== "folder") {
-			return node;
-		}
-
-		if (node.id === parentId) {
-			return {
-				...node,
-				children: [...node.children, folder],
-			};
-		}
-
-		return {
-			...node,
-			children: insertProjectFolderNode(node.children, parentId, folder),
-		};
-	});
-};
-
-const findProjectNodeLocation = (
-	nodes: readonly ProjectTreeNode[],
-	nodeId: string,
-	parentId: string | null = null,
-): ProjectNodeLocation | null => {
-	for (let index = 0; index < nodes.length; index += 1) {
-		const node = nodes[index];
-
-		if (getProjectTreeNodeId(node) === nodeId) {
-			return { parentId, index, node };
-		}
-
-		if (node.kind === "folder") {
-			const nestedLocation = findProjectNodeLocation(node.children, nodeId, node.id);
-
-			if (nestedLocation) {
-				return nestedLocation;
-			}
-		}
-	}
-
-	return null;
-};
-
-const findProjectNodeDepth = (nodes: readonly ProjectTreeNode[], nodeId: string, depth = 0): number | null => {
-	for (const node of nodes) {
-		if (getProjectTreeNodeId(node) === nodeId) {
-			return depth;
-		}
-
-		if (node.kind === "folder") {
-			const nestedDepth = findProjectNodeDepth(node.children, nodeId, depth + 1);
-
-			if (nestedDepth !== null) {
-				return nestedDepth;
-			}
-		}
-	}
-
-	return null;
-};
-
-const projectTreeContainsNode = (nodes: readonly ProjectTreeNode[], nodeId: string): boolean => {
-	for (const node of nodes) {
-		if (getProjectTreeNodeId(node) === nodeId) {
-			return true;
-		}
-
-		if (node.kind === "folder" && projectTreeContainsNode(node.children, nodeId)) {
-			return true;
-		}
-	}
-
-	return false;
-};
-
-const removeProjectTreeNode = (
-	nodes: readonly ProjectTreeNode[],
-	nodeId: string,
-): { nodes: ProjectTreeNode[]; removed: ProjectTreeNode | null } => {
-	const nextNodes: ProjectTreeNode[] = [];
-	let removed: ProjectTreeNode | null = null;
-
-	for (const node of nodes) {
-		if (getProjectTreeNodeId(node) === nodeId) {
-			removed = node;
-			continue;
-		}
-
-		if (node.kind === "folder") {
-			const result = removeProjectTreeNode(node.children, nodeId);
-
-			if (result.removed) {
-				removed = result.removed;
-				nextNodes.push({
-					...node,
-					children: result.nodes,
-				});
-				continue;
-			}
-		}
-
-		nextNodes.push(node);
-	}
-
-	return { nodes: nextNodes, removed };
-};
-
-const insertProjectTreeNode = (
-	nodes: readonly ProjectTreeNode[],
-	parentId: string | null,
-	index: number,
-	nodeToInsert: ProjectTreeNode,
-): ProjectTreeNode[] => {
-	if (parentId === null) {
-		const nextNodes = [...nodes];
-		nextNodes.splice(Math.max(0, Math.min(index, nextNodes.length)), 0, nodeToInsert);
-		return nextNodes;
-	}
-
-	return nodes.map((node) => {
-		if (node.kind !== "folder") {
-			return node;
-		}
-
-		if (node.id === parentId) {
-			const nextChildren = [...node.children];
-			nextChildren.splice(Math.max(0, Math.min(index, nextChildren.length)), 0, nodeToInsert);
-			return {
-				...node,
-				children: nextChildren,
-			};
-		}
-
-		return {
-			...node,
-			children: insertProjectTreeNode(node.children, parentId, index, nodeToInsert),
-		};
-	});
-};
-
-const moveProjectTreeNode = (
-	nodes: readonly ProjectTreeNode[],
-	draggedNodeId: string,
-	dropTarget: ProjectDragTarget,
-): ProjectTreeNode[] => {
-	const location = findProjectNodeLocation(nodes, draggedNodeId);
-
-	if (!location) {
-		return [...nodes];
-	}
-
-	if (
-		location.node.kind === "folder" &&
-		dropTarget.parentId !== null &&
-		(projectTreeContainsNode(location.node.children, dropTarget.parentId) || dropTarget.parentId === location.node.id)
-	) {
-		return [...nodes];
-	}
-
-	let normalizedIndex = dropTarget.index;
-
-	if (dropTarget.parentId === location.parentId && dropTarget.index > location.index) {
-		normalizedIndex -= 1;
-	}
-
-	if (dropTarget.parentId === location.parentId && normalizedIndex === location.index) {
-		return [...nodes];
-	}
-
-	const removalResult = removeProjectTreeNode(nodes, draggedNodeId);
-
-	if (!removalResult.removed) {
-		return [...nodes];
-	}
-
-	return insertProjectTreeNode(removalResult.nodes, dropTarget.parentId, normalizedIndex, removalResult.removed);
-};
-
-const ProjectFolderDraftRow = (props: {
-	depth: number;
-	value: string;
-	onInput: (value: string) => void;
-	onSubmit: () => void;
-	onCancel: () => void;
-}): JSX.Element => {
-	let inputRef: HTMLInputElement | undefined;
-
-	queueMicrotask(() => inputRef?.focus());
-
-	return (
-		<li>
-			<div class={styles.treeInputRow} style={{ "--tree-depth": String(props.depth) }}>
-				<Folder class={styles.icon} size={18} strokeWidth={2} />
-				<input
-					ref={inputRef}
-					type="text"
-					class={styles.treeInput}
-					value={props.value}
-					placeholder="Folder name"
-					onInput={(event): void => props.onInput(event.currentTarget.value)}
-					onBlur={props.onSubmit}
-					onKeyDown={(event): void => {
-						if (event.key === "Enter") {
-							event.preventDefault();
-							event.currentTarget.blur();
-							return;
-						}
-
-						if (event.key === "Escape") {
-							event.preventDefault();
-							props.onCancel();
-							event.currentTarget.blur();
-						}
-					}}
-				/>
-			</div>
-		</li>
-	);
-};
-
-const ProjectFolderBranch = (props: {
-	nodes: readonly ProjectTreeNode[];
-	depth: number;
-	parentId: string | null;
-	selectedProjectId: string;
-	isFolderCollapsed: (folderId: string) => boolean;
-	onToggleFolder: (folderId: string) => void;
-	onSelectProject: (projectId: string) => void;
-	onOpenFolderMenu: (event: MouseEvent, folder: ProjectFolderNode) => void;
-	onOpenProjectMenu: (event: MouseEvent, item: ProjectItem) => void;
-	onNodePointerDown: (event: PointerEvent, nodeId: string) => void;
-	onNodePointerMove: (event: PointerEvent, parentId: string | null, index: number, node: ProjectTreeNode) => void;
-	pendingFolderDraft: PendingProjectFolderDraft | null;
-	pendingFolderName: string;
-	onPendingFolderNameChange: (value: string) => void;
-	onSubmitPendingFolder: () => void;
-	onCancelPendingFolder: () => void;
-	dragState: ProjectDragState | null;
-}): JSX.Element => (
-	<ul class={styles.treeList} role="list">
-		<Show when={props.nodes.length === 0 && props.pendingFolderDraft?.parentId !== props.parentId}>
-			<li>
-				<div class={styles.treeEmptySlot} style={{ "--tree-depth": String(props.depth) }} />
-			</li>
-		</Show>
-
-		<For each={props.nodes}>
-			{(node, indexAccessor): JSX.Element => {
-				const nodeId = (): string => getProjectTreeNodeId(node);
-				const isDraggedNode = (): boolean => props.dragState?.draggedNodeId === nodeId();
-				const dropIntent = (): ProjectDragTarget["intent"] | null => {
-					if (props.dragState?.dropTarget?.targetNodeId !== nodeId()) {
-						return null;
-					}
-
-					return props.dragState.dropTarget.intent;
-				};
-
-				if (node.kind === "folder") {
-					const isCollapsed = (): boolean => props.isFolderCollapsed(node.id);
-
-					return (
-						<li>
-							<button
-								type="button"
-								classList={{
-									[styles.treeItem]: true,
-									[styles.treeItemFolder]: true,
-									[styles.treeItemDragging]: isDraggedNode(),
-									[styles.treeItemDropBefore]: dropIntent() === "before",
-									[styles.treeItemDropAfter]: dropIntent() === "after",
-									[styles.treeItemDropInside]: dropIntent() === "inside",
-								}}
-								style={{ "--tree-depth": String(props.depth) }}
-								aria-expanded={!isCollapsed()}
-								onClick={() => {
-									if (props.dragState || suppressNextTreeClick()) {
-										return;
-									}
-
-									props.onToggleFolder(node.id);
-								}}
-								onContextMenu={(event): void => props.onOpenFolderMenu(event, node)}
-								onPointerDown={(event): void => props.onNodePointerDown(event, node.id)}
-								onPointerMove={(event): void =>
-									props.onNodePointerMove(event, props.parentId, indexAccessor(), node)
-								}
-								onPointerEnter={(event): void =>
-									props.onNodePointerMove(event, props.parentId, indexAccessor(), node)
-								}
-							>
-								<ChevronRight
-									classList={{
-										[styles.folderChevron]: true,
-										[styles.folderChevronOpen]: !isCollapsed(),
-									}}
-									size={16}
-									strokeWidth={2}
-								/>
-								<Folder class={styles.icon} size={18} strokeWidth={2} />
-								<span class={styles.label}>{node.label}</span>
-								<Show when={node.meta}>
-									<span class={styles.itemMeta}>{node.meta}</span>
-								</Show>
-							</button>
-
-							<Show when={!isCollapsed() && (node.children.length > 0 || props.pendingFolderDraft?.parentId === node.id)}>
-								<ProjectFolderBranch
-									nodes={node.children}
-									depth={props.depth + 1}
-									parentId={node.id}
-									selectedProjectId={props.selectedProjectId}
-									isFolderCollapsed={props.isFolderCollapsed}
-									onToggleFolder={props.onToggleFolder}
-									onSelectProject={props.onSelectProject}
-									onOpenFolderMenu={props.onOpenFolderMenu}
-									onOpenProjectMenu={props.onOpenProjectMenu}
-									onNodePointerDown={props.onNodePointerDown}
-									onNodePointerMove={props.onNodePointerMove}
-									pendingFolderDraft={props.pendingFolderDraft}
-									pendingFolderName={props.pendingFolderName}
-									onPendingFolderNameChange={props.onPendingFolderNameChange}
-									onSubmitPendingFolder={props.onSubmitPendingFolder}
-									onCancelPendingFolder={props.onCancelPendingFolder}
-									dragState={props.dragState}
-								/>
-							</Show>
-						</li>
-					);
-				}
-
-				return (
-					<li>
-						<button
-							type="button"
-							classList={{
-								[styles.treeItem]: true,
-								[styles.treeItemActive]: props.selectedProjectId === node.item.id,
-								[styles.treeItemDragging]: isDraggedNode(),
-								[styles.treeItemDropBefore]: dropIntent() === "before",
-								[styles.treeItemDropAfter]: dropIntent() === "after",
-							}}
-							style={{ "--tree-depth": String(props.depth) }}
-							onClick={(): void => {
-								if (props.dragState || suppressNextTreeClick()) {
-									return;
-								}
-
-								props.onSelectProject(node.item.id);
-							}}
-							onContextMenu={(event): void => props.onOpenProjectMenu(event, node.item)}
-							onPointerDown={(event): void => props.onNodePointerDown(event, node.item.id)}
-							onPointerMove={(event): void =>
-								props.onNodePointerMove(event, props.parentId, indexAccessor(), node)
-							}
-							onPointerEnter={(event): void =>
-								props.onNodePointerMove(event, props.parentId, indexAccessor(), node)
-							}
-						>
-							<LayoutGrid class={styles.icon} size={18} strokeWidth={2} />
-							<span class={styles.label}>{node.item.name}</span>
-							<Show when={node.item.meta}>
-								<span class={styles.itemMeta}>{node.item.meta}</span>
-							</Show>
-						</button>
-					</li>
-				);
-			}}
-		</For>
-
-		<Show when={props.pendingFolderDraft?.parentId === props.parentId}>
-			<ProjectFolderDraftRow
-				depth={props.pendingFolderDraft?.depth ?? props.depth}
-				value={props.pendingFolderName}
-				onInput={props.onPendingFolderNameChange}
-				onSubmit={props.onSubmitPendingFolder}
-				onCancel={props.onCancelPendingFolder}
-			/>
-		</Show>
-	</ul>
-);
-
-export const ProjectSelector = (props: ProjectSelectorProps): JSX.Element => {
-	const appShellData = useAppShellData();
-	const [selectedProject, setSelectedProject] = createSignal(appShellData.activeProject());
-	const [drawerTop, setDrawerTop] = createSignal<number>(0);
-	const [collapsedFolderIds, setCollapsedFolderIds] = createSignal<readonly string[]>([]);
-	const [projectTreeNodes, setProjectTreeNodes] = createSignal<ProjectTreeNode[]>(
-		buildProjectTree(appShellData.projectItems()),
-	);
-	const [pendingFolderDraft, setPendingFolderDraft] = createSignal<PendingProjectFolderDraft | null>(null);
-	const [pendingFolderName, setPendingFolderName] = createSignal("");
-	const [dragState, setDragState] = createSignal<ProjectDragState | null>(null);
-	const [suppressNextTreeClick, setSuppressNextTreeClick] = createSignal(false);
-	let rootRef: HTMLDivElement | undefined;
-	let triggerRef: HTMLButtonElement | undefined;
-	let contextMenuRef: HTMLDivElement | undefined;
-	let longPressTimer: number | undefined;
-	let suppressClickTimer: number | undefined;
-	const contextMenu = createProjectContextMenuController();
-
-	const clearLongPressTimer = (): void => {
-		if (longPressTimer !== undefined) {
-			window.clearTimeout(longPressTimer);
-			longPressTimer = undefined;
-		}
-	};
-
-	const suppressTreeClickTemporarily = (): void => {
-		setSuppressNextTreeClick(true);
-
-		if (suppressClickTimer !== undefined) {
-			window.clearTimeout(suppressClickTimer);
-		}
-
-		suppressClickTimer = window.setTimeout(() => {
-			setSuppressNextTreeClick(false);
-			suppressClickTimer = undefined;
-		}, 80);
-	};
-
-	const isFolderCollapsed = (folderId: string): boolean => collapsedFolderIds().includes(folderId);
-
-	const toggleFolder = (folderId: string): void => {
-		setCollapsedFolderIds((current) =>
-			current.includes(folderId) ? current.filter((id) => id !== folderId) : [...current, folderId],
-		);
-	};
-
-	createEffect(() => {
-		setSelectedProject(appShellData.activeProject());
-	});
-
-	createEffect(() => {
-		setProjectTreeNodes(buildProjectTree(appShellData.projectItems()));
-		setCollapsedFolderIds([]);
-		setPendingFolderDraft(null);
-		setPendingFolderName("");
-		setDragState(null);
-	});
-
-	onMount(() => {
-		if (triggerRef) {
-			const updateDrawerTop = (): void => {
-				if (!triggerRef) {
-					return;
-				}
-
-				setDrawerTop(triggerRef.offsetTop + triggerRef.offsetHeight + 8);
-			};
-
-			updateDrawerTop();
-
-			const observer = new ResizeObserver(() => {
-				updateDrawerTop();
-			});
-
-			observer.observe(triggerRef);
-			window.addEventListener("resize", updateDrawerTop);
-
-			onCleanup(() => {
-				observer.disconnect();
-				window.removeEventListener("resize", updateDrawerTop);
-			});
-		}
-
-		const handlePointerDown = (event: PointerEvent): void => {
-			if (!props.isOpen || !rootRef) {
-				return;
-			}
-
-			const target = event.target;
-
-			if (target instanceof Node && rootRef.contains(target)) {
-				return;
-			}
-
-			if (target instanceof Node && contextMenuRef?.contains(target)) {
-				return;
-			}
-
-			props.onClose();
-		};
-
-		const handlePointerUp = (): void => {
-			clearLongPressTimer();
-
-			const nextDragState = dragState();
-
-			if (!nextDragState?.dropTarget) {
-				if (nextDragState) {
-					suppressTreeClickTemporarily();
-				}
-				setDragState(null);
-				return;
-			}
-
-			suppressTreeClickTemporarily();
-			setProjectTreeNodes((current) =>
-				moveProjectTreeNode(current, nextDragState.draggedNodeId, nextDragState.dropTarget as ProjectDragTarget),
-			);
-			setDragState(null);
-		};
-
-		const handleEscape = (event: KeyboardEvent): void => {
-			if (event.key !== "Escape") {
-				return;
-			}
-
-			clearLongPressTimer();
-
-			if (dragState()) {
-				setDragState(null);
-				return;
-			}
-
-			if (!props.isOpen) {
-				return;
-			}
-
-			props.onClose();
-			triggerRef?.focus();
-		};
-
-		document.addEventListener("pointerdown", handlePointerDown);
-		window.addEventListener("pointerup", handlePointerUp);
-		window.addEventListener("pointercancel", handlePointerUp);
-		window.addEventListener("keydown", handleEscape);
-
-		onCleanup(() => {
-			clearLongPressTimer();
-			if (suppressClickTimer !== undefined) {
-				window.clearTimeout(suppressClickTimer);
-			}
-			document.removeEventListener("pointerdown", handlePointerDown);
-			window.removeEventListener("pointerup", handlePointerUp);
-			window.removeEventListener("pointercancel", handlePointerUp);
-			window.removeEventListener("keydown", handleEscape);
-		});
-	});
-
-	const toggleOpen = (): void => {
-		if (!props.isOpen) {
-			props.onToggle();
-			return;
-		}
-
-		props.onClose();
-	};
-
-	const selectProject = (projectId: string): void => {
-		const location = findProjectNodeLocation(projectTreeNodes(), projectId);
-
-		if (!location || location.node.kind !== "project") {
-			return;
-		}
-
-		setSelectedProject({ id: location.node.item.id, name: location.node.item.name });
-		props.onClose();
-	};
-
-	const beginFolderDraft = (parentId: string | null, depth: number): void => {
-		if (parentId) {
-			setCollapsedFolderIds((current) => current.filter((id) => id !== parentId));
-		}
-
-		setPendingFolderName("");
-		setPendingFolderDraft({ parentId, depth });
-	};
-
-	const submitPendingFolder = (): void => {
-		const name = pendingFolderName().trim();
-		const draft = pendingFolderDraft();
-
-		if (!draft) {
-			return;
-		}
-
-		if (!name) {
-			setPendingFolderDraft(null);
-			setPendingFolderName("");
-			return;
-		}
-
-		setProjectTreeNodes((current) =>
-			insertProjectFolderNode(current, draft.parentId, {
-				kind: "folder",
-				id: createProjectFolderId(),
-				label: name,
-				children: [],
-			}),
-		);
-		setPendingFolderDraft(null);
-		setPendingFolderName("");
-	};
-
-	const cancelPendingFolder = (): void => {
-		setPendingFolderDraft(null);
-		setPendingFolderName("");
-	};
-
-	const handleContextActionSelect = (action: { id: string; label: string }, target: ProjectMenuTarget): void => {
-		if (action.id !== "new-folder") {
-			return;
-		}
-
-		switch (target.kind) {
-			case "surface":
-				beginFolderDraft(null, 0);
-				return;
-			case "folder":
-				beginFolderDraft(target.id, (findProjectNodeDepth(projectTreeNodes(), target.id) ?? 0) + 1);
-				return;
-			case "project": {
-				const parentId = findProjectNodeLocation(projectTreeNodes(), target.id)?.parentId ?? null;
-				beginFolderDraft(parentId, parentId ? (findProjectNodeDepth(projectTreeNodes(), parentId) ?? 0) + 1 : 0);
-				return;
-			}
-		}
-	};
-
-	const handleSurfaceContextMenu = (event: MouseEvent): void => {
-		event.stopPropagation();
-		contextMenu.openMenu(event, createProjectSurfaceTarget("Projects"));
-	};
-
-	const handleNodePointerDown = (event: PointerEvent, nodeId: string): void => {
-		if (event.button !== 0 || pendingFolderDraft()) {
-			return;
-		}
-
-		clearLongPressTimer();
-		longPressTimer = window.setTimeout(() => {
-			suppressTreeClickTemporarily();
-			setDragState({ draggedNodeId: nodeId, dropTarget: null });
-		}, LONG_PRESS_MS);
-	};
-
-	const handleNodePointerMove = (
-		event: PointerEvent,
-		parentId: string | null,
-		index: number,
-		node: ProjectTreeNode,
-	): void => {
-		const nextDragState = dragState();
-
-		if (!nextDragState) {
-			return;
-		}
-
-		if (nextDragState.draggedNodeId === getProjectTreeNodeId(node)) {
-			return;
-		}
-
-		const bounds = event.currentTarget.getBoundingClientRect();
-		const relativeY = bounds.height <= 0 ? 0.5 : (event.clientY - bounds.top) / bounds.height;
-		let nextTarget: ProjectDragTarget;
-
-		if (node.kind === "folder") {
-			if (relativeY < 0.28) {
-				nextTarget = {
-					parentId,
-					index,
-					intent: "before",
-					targetNodeId: node.id,
-				};
-			} else if (relativeY > 0.72) {
-				nextTarget = {
-					parentId,
-					index: index + 1,
-					intent: "after",
-					targetNodeId: node.id,
-				};
-			} else {
-				nextTarget = {
-					parentId: node.id,
-					index: node.children.length,
-					intent: "inside",
-					targetNodeId: node.id,
-				};
-			}
-		} else {
-			nextTarget = {
-				parentId,
-				index: relativeY < 0.5 ? index : index + 1,
-				intent: relativeY < 0.5 ? "before" : "after",
-				targetNodeId: node.item.id,
-			};
-		}
-
-		setDragState({
-			...nextDragState,
-			dropTarget: nextTarget,
-		});
-	};
-
-	return (
-		<div
-			ref={rootRef}
-			classList={{
-				[styles.root]: true,
-				[styles.rootCompact]: !!props.compact,
-				[styles.rootDragMode]: !!dragState(),
-			}}
-			style={{
-				"--project-drawer-top": `${drawerTop()}px`,
-			}}
-		>
-			<button
-				type="button"
-				ref={triggerRef}
-				classList={{
-					[styles.trigger]: true,
-					[styles.triggerCompact]: !!props.compact,
-					[styles.triggerOpen]: props.isOpen,
-				}}
-				aria-label={`Open project menu for ${selectedProject().name}`}
-				aria-expanded={props.isOpen}
-				aria-haspopup="menu"
-				title={selectedProject().name}
-				onClick={toggleOpen}
-			>
-				<span class={styles.triggerLead} aria-hidden="true">
-					<Folder size={18} strokeWidth={2} />
-				</span>
-				{!props.compact ? (
-					<span class={styles.triggerCopy}>
-						<span class={styles.eyebrow}>Projects</span>
-						<span class={styles.value}>{selectedProject().name}</span>
-					</span>
-				) : null}
-				<ChevronDown
-					classList={{
-						[styles.triggerIcon]: true,
-						[styles.triggerIconOpen]: props.isOpen,
-					}}
-					size={16}
-					strokeWidth={2}
-				/>
-			</button>
-
-			<Show when={props.isOpen}>
-				<>
-					<button
-						type="button"
-						classList={{
-							[styles.scrim]: true,
-							[styles.scrimOpen]: props.isOpen,
-						}}
-						aria-hidden={!props.isOpen}
-						tabIndex={props.isOpen ? 0 : -1}
-						onClick={props.onClose}
-					/>
-
-					<div
-						classList={{
-							[styles.drawer]: true,
-							[styles.drawerOpen]: props.isOpen,
-						}}
-						aria-hidden={!props.isOpen}
-						onContextMenu={handleSurfaceContextMenu}
-					>
-						<div class={styles.drawerBody}>
-							<Show when={!props.compact}>
-								<div class={styles.treeSectionLabel}>Projects</div>
-							</Show>
-
-							<ProjectFolderBranch
-								nodes={projectTreeNodes()}
-								depth={0}
-								parentId={null}
-								selectedProjectId={selectedProject().id}
-								isFolderCollapsed={isFolderCollapsed}
-								onToggleFolder={toggleFolder}
-								onSelectProject={selectProject}
-								onOpenFolderMenu={(event, folder): void => {
-									event.stopPropagation();
-									contextMenu.openMenu(event, createProjectFolderTarget(folder.id, folder.label));
-								}}
-								onOpenProjectMenu={(event, item): void => {
-									event.stopPropagation();
-									contextMenu.openMenu(event, createProjectTarget(item));
-								}}
-								onNodePointerDown={handleNodePointerDown}
-								onNodePointerMove={handleNodePointerMove}
-								pendingFolderDraft={pendingFolderDraft()}
-								pendingFolderName={pendingFolderName()}
-								onPendingFolderNameChange={setPendingFolderName}
-								onSubmitPendingFolder={submitPendingFolder}
-								onCancelPendingFolder={cancelPendingFolder}
-								dragState={dragState()}
-							/>
-						</div>
-					</div>
-				</>
-			</Show>
-
-			<ProjectContextMenu
-				target={contextMenu.menuState()?.target ?? null}
-				position={(() => {
-					const state = contextMenu.menuState();
-					return state ? { x: state.x, y: state.y } : null;
-				})()}
-				menuRef={(element) => {
-					contextMenuRef = element;
-					contextMenu.setMenuRef(element);
-				}}
-				onClose={contextMenu.closeMenu}
-				onSelect={handleContextActionSelect}
-			/>
-		</div>
-	);
-};

Frontend/src/components/shell/WorkspaceSidebar/WorkspaceSidebar.tsx

@@ -1,826 +0,0 @@
-// Path: Frontend/src/components/shell/WorkspaceSidebar/WorkspaceSidebar.tsx
-
-import { For, Show, createEffect, createSignal, onCleanup, onMount, type JSX } from "solid-js";
-import { ChevronLeft, ChevronRight, Folder } from "../../../lib/icons";
-import { useAppShellData } from "../data/app-shell.context";
-import { ProjectSelector } from "../ProjectSelector/ProjectSelector";
-import {
-	createWorkspaceStaticTarget,
-	createWorkspaceSurfaceTarget,
-	createWorkspaceTreeTarget,
-	getWorkspaceNodeIcon,
-	workspaceSidebarHeaderActions,
-	workspaceStaticItems,
-	type WorkspaceContextMenuAction,
-	type WorkspaceContextMenuTarget,
-	type WorkspaceStaticItem,
-	type WorkspaceTreeNode,
-} from "../data/shell.data";
-import { WorkspaceContextMenu } from "../WorkspaceContextMenu/WorkspaceContextMenu";
-import { createWorkspaceContextMenuController } from "../WorkspaceContextMenu/createWorkspaceContextMenuController";
-import styles from "./WorkspaceSidebar.module.scss";
-
-type WorkspaceSidebarProps = {
-	collapsed: boolean;
-	railCollapsed: boolean;
-	onToggleRailCollapse: () => void;
-};
-
-type PendingWorkspaceFolderDraft = {
-	parentId: string | null;
-	depth: number;
-};
-
-type WorkspaceDragTarget = {
-	parentId: string | null;
-	index: number;
-	intent: "before" | "after" | "inside";
-	targetNodeId?: string;
-};
-
-type WorkspaceDragState = {
-	draggedNodeId: string;
-	dropTarget: WorkspaceDragTarget | null;
-};
-
-type WorkspaceNodeLocation = {
-	parentId: string | null;
-	index: number;
-	node: WorkspaceTreeNode;
-};
-
-const LONG_PRESS_MS = 320;
-
-const createWorkspaceFolderId = (): string => `folder-${Math.random().toString(36).slice(2, 10)}`;
-
-const getWorkspaceTreeNodeId = (node: WorkspaceTreeNode): string => node.id;
-
-const insertWorkspaceFolderNode = (
-	nodes: readonly WorkspaceTreeNode[],
-	parentId: string | null,
-	folder: WorkspaceTreeNode,
-): readonly WorkspaceTreeNode[] => {
-	if (parentId === null) {
-		return [...nodes, folder];
-	}
-
-	return nodes.map((node) => {
-		if (node.kind !== "folder") {
-			return node;
-		}
-
-		if (node.id === parentId) {
-			return {
-				...node,
-				children: [...(node.children ?? []), folder],
-			};
-		}
-
-		return {
-			...node,
-			children: node.children ? insertWorkspaceFolderNode(node.children, parentId, folder) : node.children,
-		};
-	});
-};
-
-const findWorkspaceFolderDepth = (nodes: readonly WorkspaceTreeNode[], folderId: string, depth = 0): number | null => {
-	for (const node of nodes) {
-		if (node.kind !== "folder") {
-			continue;
-		}
-
-		if (node.id === folderId) {
-			return depth;
-		}
-
-		const nestedDepth = node.children ? findWorkspaceFolderDepth(node.children, folderId, depth + 1) : null;
-		if (nestedDepth !== null) {
-			return nestedDepth;
-		}
-	}
-
-	return null;
-};
-
-const findWorkspaceNodeLocation = (
-	nodes: readonly WorkspaceTreeNode[],
-	nodeId: string,
-	parentId: string | null = null,
-): WorkspaceNodeLocation | null => {
-	for (let index = 0; index < nodes.length; index += 1) {
-		const node = nodes[index];
-
-		if (node.id === nodeId) {
-			return { parentId, index, node };
-		}
-
-		if (node.kind === "folder" && node.children) {
-			const nestedLocation = findWorkspaceNodeLocation(node.children, nodeId, node.id);
-
-			if (nestedLocation) {
-				return nestedLocation;
-			}
-		}
-	}
-
-	return null;
-};
-
-const workspaceTreeContainsNode = (nodes: readonly WorkspaceTreeNode[], nodeId: string): boolean => {
-	for (const node of nodes) {
-		if (node.id === nodeId) {
-			return true;
-		}
-
-		if (node.kind === "folder" && node.children && workspaceTreeContainsNode(node.children, nodeId)) {
-			return true;
-		}
-	}
-
-	return false;
-};
-
-const removeWorkspaceTreeNode = (
-	nodes: readonly WorkspaceTreeNode[],
-	nodeId: string,
-): { nodes: WorkspaceTreeNode[]; removed: WorkspaceTreeNode | null } => {
-	const nextNodes: WorkspaceTreeNode[] = [];
-	let removed: WorkspaceTreeNode | null = null;
-
-	for (const node of nodes) {
-		if (node.id === nodeId) {
-			removed = node;
-			continue;
-		}
-
-		if (node.kind === "folder" && node.children) {
-			const result = removeWorkspaceTreeNode(node.children, nodeId);
-
-			if (result.removed) {
-				removed = result.removed;
-				nextNodes.push({
-					...node,
-					children: result.nodes,
-				});
-				continue;
-			}
-		}
-
-		nextNodes.push(node);
-	}
-
-	return { nodes: nextNodes, removed };
-};
-
-const insertWorkspaceTreeNode = (
-	nodes: readonly WorkspaceTreeNode[],
-	parentId: string | null,
-	index: number,
-	nodeToInsert: WorkspaceTreeNode,
-): WorkspaceTreeNode[] => {
-	if (parentId === null) {
-		const nextNodes = [...nodes];
-		nextNodes.splice(Math.max(0, Math.min(index, nextNodes.length)), 0, nodeToInsert);
-		return nextNodes;
-	}
-
-	return nodes.map((node) => {
-		if (node.kind !== "folder") {
-			return node;
-		}
-
-		if (node.id === parentId) {
-			const nextChildren = [...(node.children ?? [])];
-			nextChildren.splice(Math.max(0, Math.min(index, nextChildren.length)), 0, nodeToInsert);
-			return {
-				...node,
-				children: nextChildren,
-			};
-		}
-
-		return {
-			...node,
-			children: node.children ? insertWorkspaceTreeNode(node.children, parentId, index, nodeToInsert) : node.children,
-		};
-	});
-};
-
-const moveWorkspaceTreeNode = (
-	nodes: readonly WorkspaceTreeNode[],
-	draggedNodeId: string,
-	dropTarget: WorkspaceDragTarget,
-): WorkspaceTreeNode[] => {
-	const location = findWorkspaceNodeLocation(nodes, draggedNodeId);
-
-	if (!location) {
-		return [...nodes];
-	}
-
-	if (
-		location.node.kind === "folder" &&
-		dropTarget.parentId !== null &&
-		((location.node.children && workspaceTreeContainsNode(location.node.children, dropTarget.parentId)) ||
-			dropTarget.parentId === location.node.id)
-	) {
-		return [...nodes];
-	}
-
-	let normalizedIndex = dropTarget.index;
-
-	if (dropTarget.parentId === location.parentId && dropTarget.index > location.index) {
-		normalizedIndex -= 1;
-	}
-
-	if (dropTarget.parentId === location.parentId && normalizedIndex === location.index) {
-		return [...nodes];
-	}
-
-	const removalResult = removeWorkspaceTreeNode(nodes, draggedNodeId);
-
-	if (!removalResult.removed) {
-		return [...nodes];
-	}
-
-	return insertWorkspaceTreeNode(removalResult.nodes, dropTarget.parentId, normalizedIndex, removalResult.removed);
-};
-
-const FolderDraftRow = (props: {
-	depth: number;
-	value: string;
-	onInput: (value: string) => void;
-	onSubmit: () => void;
-	onCancel: () => void;
-}): JSX.Element => {
-	let inputRef: HTMLInputElement | undefined;
-
-	queueMicrotask(() => inputRef?.focus());
-
-	return (
-		<li>
-			<div class={styles.treeInputRow} style={{ "--tree-depth": String(props.depth) }}>
-				<Folder class={styles.icon} size={18} strokeWidth={2} />
-				<input
-					ref={inputRef}
-					type="text"
-					class={styles.treeInput}
-					value={props.value}
-					placeholder="Folder name"
-					onInput={(event): void => props.onInput(event.currentTarget.value)}
-					onBlur={props.onSubmit}
-					onKeyDown={(event): void => {
-						if (event.key === "Enter") {
-							event.preventDefault();
-							event.currentTarget.blur();
-							return;
-						}
-
-						if (event.key === "Escape") {
-							event.preventDefault();
-							props.onCancel();
-							event.currentTarget.blur();
-						}
-					}}
-				/>
-			</div>
-		</li>
-	);
-};
-
-const isContextMenuKeyboardTrigger = (event: KeyboardEvent): boolean => event.key === "ContextMenu" || (event.shiftKey && event.key === "F10");
-
-const WorkspaceHomeEntry = (props: {
-	item: WorkspaceStaticItem;
-	onOpenContextMenu: (event: MouseEvent, target: WorkspaceContextMenuTarget) => void;
-	onOpenContextMenuFromKeyboard: (element: HTMLElement, target: WorkspaceContextMenuTarget) => void;
-	onNodePointerDown: (event: PointerEvent, nodeId: string) => void;
-	onNodePointerMove: (event: PointerEvent, parentId: string | null, index: number, node: WorkspaceTreeNode) => void;
-	dragState: WorkspaceDragState | null;
-	isTreeClickSuppressed: () => boolean;
-}): JSX.Element => {
-	const Icon = props.item.icon;
-	const target = createWorkspaceStaticTarget(props.item);
-
-	return (
-		<li>
-			<button
-				type="button"
-				classList={{
-					[styles.navItem]: true,
-					[styles.navItemActive]: !!props.item.active,
-				}}
-				aria-current={props.item.active ? "page" : undefined}
-				aria-label={props.item.label}
-				title={props.item.label}
-				data-slot="workspace-static-item"
-				data-target-kind={target.kind}
-				data-active={props.item.active ? "true" : "false"}
-				onContextMenu={(event): void => {
-					event.stopPropagation();
-					props.onOpenContextMenu(event, target);
-				}}
-				onKeyDown={(event): void => {
-					if (!isContextMenuKeyboardTrigger(event)) {
-						return;
-					}
-
-					event.preventDefault();
-					props.onOpenContextMenuFromKeyboard(event.currentTarget, target);
-				}}
-			>
-				<Icon class={styles.icon} size={18} strokeWidth={2} />
-				<span class={styles.label}>{props.item.label}</span>
-				<Show when={props.item.meta}>
-					<span class={styles.itemMeta}>{props.item.meta}</span>
-				</Show>
-			</button>
-		</li>
-	);
-};
-
-const WorkspaceTreeBranch = (props: {
-	nodes: readonly WorkspaceTreeNode[];
-	parentId?: string | null;
-	depth?: number;
-	isFolderCollapsed: (folderId: string) => boolean;
-	onToggleFolder: (folderId: string) => void;
-	pendingFolderDraft: PendingWorkspaceFolderDraft | null;
-	pendingFolderName: string;
-	onPendingFolderNameChange: (value: string) => void;
-	onSubmitPendingFolder: () => void;
-	onCancelPendingFolder: () => void;
-	onOpenContextMenu: (event: MouseEvent, target: WorkspaceContextMenuTarget) => void;
-	onOpenContextMenuFromKeyboard: (element: HTMLElement, target: WorkspaceContextMenuTarget) => void;
-}): JSX.Element => {
-	const depth = () => props.depth ?? 0;
-	const parentId = () => props.parentId ?? null;
-
-	return (
-		<ul class={styles.treeList} role="list">
-		<Show when={props.nodes.length === 0 && props.pendingFolderDraft?.parentId !== parentId()}>
-			<li>
-				<div class={styles.treeEmptySlot} style={{ "--tree-depth": String(depth()) }} />
-			</li>
-		</Show>
-			<For each={props.nodes}>
-				{(node, indexAccessor): JSX.Element => {
-					const Icon = getWorkspaceNodeIcon(node);
-					const target = createWorkspaceTreeTarget(node);
-					const isCollapsed = (): boolean => (node.kind === "folder" ? props.isFolderCollapsed(node.id) : false);
-					const isDraggedNode = (): boolean => props.dragState?.draggedNodeId === node.id;
-					const dropIntent = (): WorkspaceDragTarget["intent"] | null => {
-						if (props.dragState?.dropTarget?.targetNodeId !== node.id) {
-							return null;
-						}
-
-						return props.dragState.dropTarget.intent;
-					};
-
-					return (
-						<li>
-							<button
-								type="button"
-								classList={{
-									[styles.treeItem]: true,
-									[styles.treeItemActive]: !!node.active,
-									[styles.treeItemFolder]: node.kind === "folder",
-									[styles.treeItemDragging]: isDraggedNode(),
-									[styles.treeItemDropBefore]: dropIntent() === "before",
-									[styles.treeItemDropAfter]: dropIntent() === "after",
-									[styles.treeItemDropInside]: dropIntent() === "inside",
-								}}
-								style={{ "--tree-depth": String(depth()) }}
-								aria-expanded={node.kind === "folder" ? !isCollapsed() : undefined}
-								aria-current={node.active ? "page" : undefined}
-								aria-label={node.label}
-								title={node.label}
-								data-slot="workspace-tree-item"
-								data-kind={node.kind}
-								data-item-type={node.kind === "item" ? node.itemType : undefined}
-								data-active={node.active ? "true" : "false"}
-								onClick={(): void => {
-									if (props.dragState || props.isTreeClickSuppressed()) {
-										return;
-									}
-
-									if (node.kind !== "folder") {
-										return;
-									}
-
-									props.onToggleFolder(node.id);
-								}}
-								onContextMenu={(event): void => {
-									event.stopPropagation();
-									props.onOpenContextMenu(event, target);
-								}}
-								onPointerDown={(event): void => props.onNodePointerDown(event, node.id)}
-								onPointerMove={(event): void =>
-									props.onNodePointerMove(event, parentId(), indexAccessor(), node)
-								}
-								onPointerEnter={(event): void =>
-									props.onNodePointerMove(event, parentId(), indexAccessor(), node)
-								}
-								onKeyDown={(event): void => {
-									if (!isContextMenuKeyboardTrigger(event)) {
-										return;
-									}
-
-									event.preventDefault();
-									props.onOpenContextMenuFromKeyboard(event.currentTarget, target);
-								}}
-							>
-								<Show when={node.kind === "folder"}>
-									<ChevronRight
-										classList={{
-											[styles.folderChevron]: true,
-											[styles.folderChevronOpen]: !isCollapsed(),
-										}}
-										size={16}
-										strokeWidth={2}
-									/>
-								</Show>
-								<Icon class={styles.icon} size={18} strokeWidth={2} />
-								<span class={styles.label}>{node.label}</span>
-								<Show when={node.meta}>
-									<span class={styles.itemMeta}>{node.meta}</span>
-								</Show>
-							</button>
-
-							<Show when={node.kind === "folder" && !isCollapsed() && (((node.children?.length ?? 0) > 0) || props.pendingFolderDraft?.parentId === node.id)}>
-								<WorkspaceTreeBranch
-									nodes={node.children ?? []}
-									parentId={node.id}
-									depth={depth() + 1}
-									isFolderCollapsed={props.isFolderCollapsed}
-									onToggleFolder={props.onToggleFolder}
-									pendingFolderDraft={props.pendingFolderDraft}
-									pendingFolderName={props.pendingFolderName}
-									onPendingFolderNameChange={props.onPendingFolderNameChange}
-									onSubmitPendingFolder={props.onSubmitPendingFolder}
-									onCancelPendingFolder={props.onCancelPendingFolder}
-									onOpenContextMenu={props.onOpenContextMenu}
-									onOpenContextMenuFromKeyboard={props.onOpenContextMenuFromKeyboard}
-									onNodePointerDown={props.onNodePointerDown}
-									onNodePointerMove={props.onNodePointerMove}
-									dragState={props.dragState}
-									isTreeClickSuppressed={props.isTreeClickSuppressed}
-								/>
-							</Show>
-						</li>
-					);
-				}}
-			</For>
-
-			<Show when={props.pendingFolderDraft && props.pendingFolderDraft.parentId === parentId()}>
-				<FolderDraftRow
-					depth={props.pendingFolderDraft?.depth ?? depth()}
-					value={props.pendingFolderName}
-					onInput={props.onPendingFolderNameChange}
-					onSubmit={props.onSubmitPendingFolder}
-					onCancel={props.onCancelPendingFolder}
-				/>
-			</Show>
-		</ul>
-	);
-};
-
-export const WorkspaceSidebar = (props: WorkspaceSidebarProps): JSX.Element => {
-	const appShellData = useAppShellData();
-	const [isProjectDrawerOpen, setIsProjectDrawerOpen] = createSignal(false);
-	const [workspaceTreeNodes, setWorkspaceTreeNodes] = createSignal<readonly WorkspaceTreeNode[]>(appShellData.workspaceTree());
-	const [collapsedFolderIds, setCollapsedFolderIds] = createSignal<readonly string[]>([]);
-	const [pendingFolderDraft, setPendingFolderDraft] = createSignal<PendingWorkspaceFolderDraft | null>(null);
-	const [pendingFolderName, setPendingFolderName] = createSignal("");
-	const [dragState, setDragState] = createSignal<WorkspaceDragState | null>(null);
-	const [suppressNextTreeClick, setSuppressNextTreeClick] = createSignal(false);
-	const contextMenu = createWorkspaceContextMenuController();
-	let longPressTimer: number | undefined;
-	let suppressClickTimer: number | undefined;
-	const railToggleLabel = (): string => (props.railCollapsed ? "Expand server rail" : "Collapse server rail");
-	const sidebarContextMenuTarget = createWorkspaceSurfaceTarget(appShellData.activeProject());
-	const isFolderCollapsed = (folderId: string): boolean => collapsedFolderIds().includes(folderId);
-	const toggleFolder = (folderId: string): void => {
-		setCollapsedFolderIds((current) =>
-			current.includes(folderId) ? current.filter((id) => id !== folderId) : [...current, folderId],
-		);
-	};
-	const clearLongPressTimer = (): void => {
-		if (longPressTimer !== undefined) {
-			window.clearTimeout(longPressTimer);
-			longPressTimer = undefined;
-		}
-	};
-	const suppressTreeClickTemporarily = (): void => {
-		setSuppressNextTreeClick(true);
-
-		if (suppressClickTimer !== undefined) {
-			window.clearTimeout(suppressClickTimer);
-		}
-
-		suppressClickTimer = window.setTimeout(() => {
-			setSuppressNextTreeClick(false);
-			suppressClickTimer = undefined;
-		}, 80);
-	};
-
-	createEffect(() => {
-		setWorkspaceTreeNodes(appShellData.workspaceTree());
-		setCollapsedFolderIds([]);
-		setPendingFolderDraft(null);
-		setPendingFolderName("");
-		setDragState(null);
-	});
-
-	onMount(() => {
-		const handlePointerUp = (): void => {
-			clearLongPressTimer();
-
-			const nextDragState = dragState();
-
-			if (!nextDragState?.dropTarget) {
-				if (nextDragState) {
-					suppressTreeClickTemporarily();
-				}
-				setDragState(null);
-				return;
-			}
-
-			suppressTreeClickTemporarily();
-			setWorkspaceTreeNodes((current) =>
-				moveWorkspaceTreeNode(current, nextDragState.draggedNodeId, nextDragState.dropTarget as WorkspaceDragTarget),
-			);
-			setDragState(null);
-		};
-
-		const handleEscape = (event: KeyboardEvent): void => {
-			if (event.key !== "Escape") {
-				return;
-			}
-
-			clearLongPressTimer();
-
-			if (dragState()) {
-				setDragState(null);
-			}
-		};
-
-		window.addEventListener("pointerup", handlePointerUp);
-		window.addEventListener("pointercancel", handlePointerUp);
-		window.addEventListener("keydown", handleEscape);
-
-		onCleanup(() => {
-			clearLongPressTimer();
-			if (suppressClickTimer !== undefined) {
-				window.clearTimeout(suppressClickTimer);
-			}
-			window.removeEventListener("pointerup", handlePointerUp);
-			window.removeEventListener("pointercancel", handlePointerUp);
-			window.removeEventListener("keydown", handleEscape);
-		});
-	});
-
-	const beginFolderDraft = (parentId: string | null, depth: number): void => {
-		if (parentId) {
-			setCollapsedFolderIds((current) => current.filter((id) => id !== parentId));
-		}
-
-		setPendingFolderName("");
-		setPendingFolderDraft({ parentId, depth });
-	};
-
-	const submitPendingFolder = (): void => {
-		const name = pendingFolderName().trim();
-		const draft = pendingFolderDraft();
-
-		if (!draft) {
-			return;
-		}
-
-		if (!name) {
-			setPendingFolderDraft(null);
-			setPendingFolderName("");
-			return;
-		}
-
-		setWorkspaceTreeNodes((current) =>
-			insertWorkspaceFolderNode(current, draft.parentId, {
-				id: createWorkspaceFolderId(),
-				label: name,
-				kind: "folder",
-				icon: Folder,
-				children: [],
-			}),
-		);
-		setPendingFolderDraft(null);
-		setPendingFolderName("");
-	};
-
-	const cancelPendingFolder = (): void => {
-		setPendingFolderDraft(null);
-		setPendingFolderName("");
-	};
-
-	const handleNodePointerDown = (event: PointerEvent, nodeId: string): void => {
-		if (event.button !== 0 || pendingFolderDraft()) {
-			return;
-		}
-
-		clearLongPressTimer();
-		longPressTimer = window.setTimeout(() => {
-			suppressTreeClickTemporarily();
-			setDragState({ draggedNodeId: nodeId, dropTarget: null });
-		}, LONG_PRESS_MS);
-	};
-
-	const handleNodePointerMove = (
-		event: PointerEvent,
-		parentId: string | null,
-		index: number,
-		node: WorkspaceTreeNode,
-	): void => {
-		const nextDragState = dragState();
-
-		if (!nextDragState || nextDragState.draggedNodeId === getWorkspaceTreeNodeId(node)) {
-			return;
-		}
-
-		const bounds = event.currentTarget.getBoundingClientRect();
-		const relativeY = bounds.height <= 0 ? 0.5 : (event.clientY - bounds.top) / bounds.height;
-		let nextTarget: WorkspaceDragTarget;
-
-		if (node.kind === "folder") {
-			if (relativeY < 0.28) {
-				nextTarget = { parentId, index, intent: "before", targetNodeId: node.id };
-			} else if (relativeY > 0.72) {
-				nextTarget = { parentId, index: index + 1, intent: "after", targetNodeId: node.id };
-			} else {
-				nextTarget = {
-					parentId: node.id,
-					index: (node.children ?? []).length,
-					intent: "inside",
-					targetNodeId: node.id,
-				};
-			}
-		} else {
-			nextTarget = {
-				parentId,
-				index: relativeY < 0.5 ? index : index + 1,
-				intent: relativeY < 0.5 ? "before" : "after",
-				targetNodeId: node.id,
-			};
-		}
-
-		setDragState({ ...nextDragState, dropTarget: nextTarget });
-	};
-
-	const handleContextActionSelect = (action: WorkspaceContextMenuAction, target: WorkspaceContextMenuTarget): void => {
-		if (action.id !== "new-folder") {
-			return;
-		}
-
-		switch (target.kind) {
-			case "workspace":
-			case "home":
-				beginFolderDraft(null, 0);
-				return;
-			case "folder":
-				beginFolderDraft(target.id, (findWorkspaceFolderDepth(workspaceTreeNodes(), target.id) ?? 0) + 1);
-				return;
-			case "settings":
-			case "item":
-				return;
-		}
-	};
-
-	return (
-		<>
-			<aside
-				classList={{
-					[styles.sidebar]: true,
-					[styles.sidebarCollapsed]: props.collapsed,
-					[styles.sidebarDragMode]: !!dragState(),
-				}}
-				aria-label="Left workspace sidebar"
-				data-ui="workspace-sidebar"
-				data-collapsed={props.collapsed ? "true" : "false"}
-				onContextMenu={(event): void => {
-					contextMenu.openMenu(event, sidebarContextMenuTarget);
-				}}
-			>
-				<div
-					classList={{
-						[styles.header]: true,
-						[styles.headerDrawerOpen]: isProjectDrawerOpen(),
-					}}
-					data-slot="workspace-sidebar-header"
-					data-drawer-open={isProjectDrawerOpen() ? "true" : "false"}
-				>
-					<div class={styles.headerActions} data-slot="workspace-sidebar-header-actions">
-						<button
-							type="button"
-							classList={{
-								[styles.headerActionButton]: true,
-								[styles.headerCollapseButton]: true,
-							}}
-							aria-label={railToggleLabel()}
-							title={railToggleLabel()}
-							data-slot="workspace-sidebar-rail-toggle"
-							onClick={props.onToggleRailCollapse}
-						>
-							{props.railCollapsed ? <ChevronRight size={16} strokeWidth={2} /> : <ChevronLeft size={16} strokeWidth={2} />}
-						</button>
-
-						<For each={workspaceSidebarHeaderActions}>
-							{(action): JSX.Element => {
-								const Icon = action.icon;
-
-								return (
-									<button type="button" class={styles.headerActionButton} aria-label={action.label} title={action.label} data-slot="workspace-sidebar-header-action" data-action-id={action.id}>
-										<Icon size={16} strokeWidth={2} />
-									</button>
-								);
-							}}
-						</For>
-					</div>
-
-					<div class={styles.headerControls} data-slot="workspace-sidebar-header-controls">
-						<ProjectSelector
-							compact={props.collapsed}
-							isOpen={isProjectDrawerOpen()}
-							onToggle={(): void => {
-								setIsProjectDrawerOpen(true);
-							}}
-							onClose={(): void => {
-								setIsProjectDrawerOpen(false);
-							}}
-						/>
-					</div>
-				</div>
-
-				<div
-					classList={{
-						[styles.section]: true,
-						[styles.sectionHidden]: isProjectDrawerOpen(),
-					}}
-					data-slot="workspace-sidebar-section"
-				>
-					<Show when={!props.collapsed}>
-						<span class={styles.sectionLabel}>Workspace</span>
-					</Show>
-					<div class={styles.navScroller} data-slot="workspace-sidebar-nav-scroller">
-						<ul class={styles.navList} role="list" data-slot="workspace-static-list">
-							<For each={workspaceStaticItems}>
-								{(item): JSX.Element => (
-									<WorkspaceHomeEntry
-										item={item}
-										onOpenContextMenu={contextMenu.openMenu}
-										onOpenContextMenuFromKeyboard={contextMenu.openMenuFromElement}
-									/>
-								)}
-							</For>
-						</ul>
-
-						<Show when={!props.collapsed}>
-							<div class={styles.treeSectionLabel}>Items</div>
-						</Show>
-
-						<div data-slot="workspace-tree-root">
-							<WorkspaceTreeBranch
-								nodes={workspaceTreeNodes()}
-								parentId={null}
-								isFolderCollapsed={isFolderCollapsed}
-								onToggleFolder={toggleFolder}
-								pendingFolderDraft={pendingFolderDraft()}
-								pendingFolderName={pendingFolderName()}
-								onPendingFolderNameChange={setPendingFolderName}
-								onSubmitPendingFolder={submitPendingFolder}
-								onCancelPendingFolder={cancelPendingFolder}
-								onOpenContextMenu={contextMenu.openMenu}
-								onOpenContextMenuFromKeyboard={contextMenu.openMenuFromElement}
-								onNodePointerDown={handleNodePointerDown}
-								onNodePointerMove={handleNodePointerMove}
-								dragState={dragState()}
-								isTreeClickSuppressed={suppressNextTreeClick}
-							/>
-						</div>
-					</div>
-				</div>
-			</aside>
-
-			<WorkspaceContextMenu
-				target={contextMenu.menuState()?.target ?? null}
-				position={(() => {
-					const state = contextMenu.menuState();
-					return state
-						? {
-							x: state.x,
-							y: state.y,
-						}
-						: null;
-				})()}
-				menuRef={contextMenu.setMenuRef}
-				onClose={contextMenu.closeMenu}
-				onSelect={handleContextActionSelect}
-			/>
-		</>
-	);
-};

Frontend/src/components/shell/data/app-shell.context.tsx

@@ -1,352 +0,0 @@
-// Path: Frontend/src/components/shell/data/app-shell.context.tsx
-
-import {
-	createContext,
-	createMemo,
-	createSignal,
-	onMount,
-	useContext,
-	type Accessor,
-	type JSX,
-} from "solid-js";
-import { Folder } from "../../../lib/icons";
-import { resolveAPIBase } from "../../../lib/api";
-import {
-	activeDepartment as fallbackActiveDepartment,
-	activeProject as fallbackActiveProject,
-	activeServer as fallbackActiveServer,
-	activeUserProfile as fallbackActiveUserProfile,
-	departmentItems as fallbackDepartmentItems,
-	organizationAdminDockActions,
-	personalDockActions,
-	projectItems as fallbackProjectItems,
-	railItems as fallbackRailItems,
-	workspaceTree as fallbackWorkspaceTree,
-	type ActiveDepartment,
-	type ActiveProject,
-	type ActiveServer,
-	type ActiveUserProfile,
-	type DepartmentItem,
-	type ProjectItem,
-	type RailItem,
-	type WorkspaceTreeNode,
-} from "./shell.data";
-
-type AppShellInstallation = {
-	id: string;
-	name: string;
-	mode: "personal" | "organizational" | string;
-	access: string;
-	protocol: string;
-	host: string;
-	isBootstrapped: boolean;
-};
-
-type AppShellAdmin = {
-	id: string;
-	email: string;
-	displayName: string;
-	isInstanceAdmin: boolean;
-	homeTitle: string;
-};
-
-type AppShellOrganization = {
-	id: string;
-	name: string;
-	slug: string;
-};
-
-type AppShellDepartment = {
-	id: string;
-	organizationId: string;
-	name: string;
-	slug: string;
-};
-
-type AppShellTeam = {
-	id: string;
-	organizationId: string;
-	departmentId?: string;
-	name: string;
-	slug: string;
-};
-
-type AppShellProject = {
-	id: string;
-	organizationId: string;
-	departmentId?: string;
-	teamId?: string;
-	name: string;
-	slug: string;
-};
-
-type AppShellWorkspace = {
-	id: string;
-	organizationId: string;
-	name: string;
-	slug: string;
-	kind: "organization" | "department" | "team" | "project" | string;
-	departmentId?: string;
-	teamId?: string;
-	projectId?: string;
-};
-
-type AppShellPayload = {
-	installation?: AppShellInstallation;
-	admin?: AppShellAdmin;
-	organizations: AppShellOrganization[];
-	departments: AppShellDepartment[];
-	teams: AppShellTeam[];
-	projects: AppShellProject[];
-	workspaces: AppShellWorkspace[];
-};
-
-const normalizeAppShellPayload = (payload: AppShellPayload | null | undefined): AppShellPayload => ({
-	installation: payload?.installation,
-	admin: payload?.admin,
-	organizations: Array.isArray(payload?.organizations) ? payload.organizations : [],
-	departments: Array.isArray(payload?.departments) ? payload.departments : [],
-	teams: Array.isArray(payload?.teams) ? payload.teams : [],
-	projects: Array.isArray(payload?.projects) ? payload.projects : [],
-	workspaces: Array.isArray(payload?.workspaces) ? payload.workspaces : [],
-});
-
-type AppShellContextValue = {
-	status: Accessor<"idle" | "loading" | "success" | "error">;
-	error: Accessor<string>;
-	installation: Accessor<AppShellInstallation | undefined>;
-	railItems: Accessor<readonly RailItem[]>;
-	activeServer: Accessor<ActiveServer>;
-	activeProject: Accessor<ActiveProject>;
-	activeDepartment: Accessor<ActiveDepartment>;
-	projectItems: Accessor<readonly ProjectItem[]>;
-	departmentItems: Accessor<readonly DepartmentItem[]>;
-	workspaceTree: Accessor<readonly WorkspaceTreeNode[]>;
-	activeUserProfile: Accessor<ActiveUserProfile>;
-	reload: () => Promise<void>;
-};
-
-const AppShellContext = createContext<AppShellContextValue>();
-
-const buildAbbreviation = (name: string, fallback: string): string => {
-	const parts = name
-		.trim()
-		.split(/\s+/)
-		.filter(Boolean);
-
-	if (parts.length === 0) {
-		return fallback;
-	}
-
-	const abbreviation = parts
-		.slice(0, 2)
-		.map((part) => part[0]?.toUpperCase() ?? "")
-		.join("");
-
-	return abbreviation || fallback;
-};
-
-const buildRailItems = (payload: AppShellPayload | null): readonly RailItem[] => {
-	if (!payload?.installation || payload.organizations.length === 0) {
-		return fallbackRailItems;
-	}
-
-	const kind = payload.installation.mode === "personal" ? "personal" : "organization";
-	const serverName = payload.installation.name || payload.organizations[0]?.name || payload.installation.host;
-
-	return payload.organizations.map((organization, index) => ({
-		id: organization.id,
-		label: serverName || organization.name,
-		abbreviation: buildAbbreviation(serverName || organization.name, kind === "personal" ? "P" : "O"),
-		kind,
-		active: index === 0,
-	}));
-};
-
-const buildActiveServer = (payload: AppShellPayload | null): ActiveServer => {
-	const installation = payload?.installation;
-	const organization = payload?.organizations[0];
-
-	if (!installation || !organization) {
-		return fallbackActiveServer;
-	}
-
-	const kind = installation.mode === "personal" ? "personal" : "organization";
-	const serverName = installation.name || organization.name || installation.host;
-
-	return {
-		id: installation.id,
-		name: serverName || fallbackActiveServer.name,
-		abbreviation: buildAbbreviation(serverName, kind === "personal" ? "P" : "O"),
-		kind,
-		connectedLabel: kind === "organization" ? `${payload?.teams.length ?? 0} connected` : undefined,
-		subtitle: kind === "personal" ? installation.host || payload?.admin?.homeTitle || "Personal home" : undefined,
-		dockActions: kind === "personal" ? personalDockActions : organizationAdminDockActions,
-	};
-};
-
-const buildProjectItems = (payload: AppShellPayload | null): readonly ProjectItem[] => {
-	if (!payload?.projects.length) {
-		return fallbackProjectItems;
-	}
-
-	return payload.projects.map((project, index) => ({
-		id: project.id,
-		name: project.name,
-		description: project.slug || "Persisted project workspace",
-		groupLabel: payload.departments.find((department) => department.id === project.departmentId)?.name || "Projects",
-		parentLabel:
-			payload.teams.find((team) => team.id === project.teamId)?.name ||
-			payload.departments.find((department) => department.id === project.departmentId)?.name ||
-			"Shared project",
-		meta: (() => {
-			const workspaceCount = payload.workspaces.filter((workspace) => workspace.projectId === project.id).length;
-
-			return workspaceCount > 0 ? `${workspaceCount} workspace${workspaceCount === 1 ? "" : "s"}` : undefined;
-		})(),
-		active: index === 0,
-	}));
-};
-
-const buildActiveProject = (payload: AppShellPayload | null): ActiveProject => {
-	const firstProject = payload?.projects[0];
-
-	if (!firstProject) {
-		return fallbackActiveProject;
-	}
-
-	return {
-		id: firstProject.id,
-		name: firstProject.name,
-	};
-};
-
-const buildDepartmentItems = (payload: AppShellPayload | null): readonly DepartmentItem[] => {
-	if (!payload?.departments.length) {
-		return fallbackDepartmentItems;
-	}
-
-	return payload.departments.map((department, index) => ({
-		id: department.id,
-		name: department.name,
-		teams: payload.teams
-			.filter((team) => team.departmentId === department.id)
-			.map((team) => team.name),
-		active: index === 0,
-	}));
-};
-
-const buildActiveDepartment = (payload: AppShellPayload | null): ActiveDepartment => {
-	const firstDepartment = payload?.departments[0];
-
-	if (!firstDepartment) {
-		return fallbackActiveDepartment;
-	}
-
-	const firstTeamName = payload?.teams.find((team) => team.departmentId === firstDepartment.id)?.name ?? "";
-
-	return {
-		id: firstDepartment.id,
-		name: firstDepartment.name,
-		teamName: firstTeamName,
-	};
-};
-
-const buildWorkspaceTree = (payload: AppShellPayload | null): readonly WorkspaceTreeNode[] => {
-	if (!payload?.projects.length) {
-		return fallbackWorkspaceTree;
-	}
-
-	// The workspace tree should represent items inside the current project, not the
-	// project container itself. We do not have project-contents hydration yet, so
-	// return an empty tree rather than showing the project root as a fake item.
-	return [];
-};
-
-const buildActiveUserProfile = (payload: AppShellPayload | null): ActiveUserProfile => {
-	if (!payload?.admin) {
-		return fallbackActiveUserProfile;
-	}
-
-	const organizationName = payload.installation?.name || payload.organizations[0]?.name || fallbackActiveServer.name;
-	const departmentName = payload.departments[0]?.name;
-
-	return {
-		name: payload.admin.displayName,
-		email: payload.admin.email,
-		roleLabel: payload.admin.isInstanceAdmin ? "Instance admin" : "Member",
-		contextLabel: departmentName ? `${organizationName} • ${departmentName}` : organizationName,
-	};
-};
-
-export const AppShellDataProvider = (props: { children: JSX.Element }): JSX.Element => {
-	const [status, setStatus] = createSignal<"idle" | "loading" | "success" | "error">("idle");
-	const [error, setError] = createSignal("");
-	const [payload, setPayload] = createSignal<AppShellPayload | null>(null);
-
-	const load = async (): Promise<void> => {
-		setStatus("loading");
-		setError("");
-
-		try {
-			const response = await fetch(`${resolveAPIBase()}/app-shell`, {
-				headers: {
-					Accept: "application/json",
-				},
-			});
-
-			const body = (await response.json()) as {
-				data?: AppShellPayload;
-				error?: { message?: string } | string;
-				message?: string;
-			};
-			const errorMessage =
-				typeof body.message === "string"
-					? body.message
-					: typeof body.error === "string"
-						? body.error
-						: body.error?.message;
-
-			if (!response.ok || !body.data) {
-				throw new Error(errorMessage || "Failed to load app shell state.");
-			}
-
-			setPayload(normalizeAppShellPayload(body.data));
-			setStatus("success");
-		} catch (loadError) {
-			setStatus("error");
-			setError(loadError instanceof Error ? loadError.message : "Failed to load app shell state.");
-		}
-	};
-
-	onMount(() => {
-		void load();
-	});
-
-	const value: AppShellContextValue = {
-		status,
-		error,
-		installation: createMemo(() => payload()?.installation),
-		railItems: createMemo(() => buildRailItems(payload())),
-		activeServer: createMemo(() => buildActiveServer(payload())),
-		activeProject: createMemo(() => buildActiveProject(payload())),
-		activeDepartment: createMemo(() => buildActiveDepartment(payload())),
-		projectItems: createMemo(() => buildProjectItems(payload())),
-		departmentItems: createMemo(() => buildDepartmentItems(payload())),
-		workspaceTree: createMemo(() => buildWorkspaceTree(payload())),
-		activeUserProfile: createMemo(() => buildActiveUserProfile(payload())),
-		reload: load,
-	};
-
-	return <AppShellContext.Provider value={value}>{props.children}</AppShellContext.Provider>;
-};
-
-export const useAppShellData = (): AppShellContextValue => {
-	const context = useContext(AppShellContext);
-
-	if (!context) {
-		throw new Error("useAppShellData must be used within AppShellDataProvider");
-	}
-
-	return context;
-};

Frontend/src/components/shell/data/shell.data.ts

@@ -1,722 +0,0 @@
-// Path: Frontend/src/components/shell/data/shell.data.ts
-
-import type { Component } from "solid-js";
-import {
-	Bell,
-	CircleHelp,
-	FileText,
-	Folder,
-	Home,
-	Keyboard,
-	LayoutGrid,
-	LogOut,
-	Repeat,
-	Search,
-	Settings,
-	Shield,
-	User,
-} from "../../../lib/icons";
-
-type ShellIconProps = {
-	class?: string;
-	size?: number;
-	strokeWidth?: number;
-};
-
-export type ShellIcon = Component<ShellIconProps>;
-
-export type RailItem = {
-	id: string;
-	label: string;
-	abbreviation: string;
-	kind: "personal" | "organization";
-	active?: boolean;
-};
-
-export type ServerDockAction = {
-	id: string;
-	label: string;
-	icon: ShellIcon;
-};
-
-export type ActiveServer = {
-	id: string;
-	name: string;
-	abbreviation: string;
-	kind: "personal" | "organization";
-	connectedLabel?: string;
-	subtitle?: string;
-	dockActions: readonly ServerDockAction[];
-};
-
-export type ActiveProject = {
-	id: string;
-	name: string;
-};
-
-export type ActiveDepartment = {
-	id: string;
-	name: string;
-	teamName: string;
-};
-
-export type DepartmentItem = {
-	id: string;
-	name: string;
-	teams: readonly string[];
-	active?: boolean;
-};
-
-export type ProjectItem = {
-	id: string;
-	name: string;
-	description: string;
-	groupLabel?: string;
-	parentLabel?: string;
-	meta?: string;
-	active?: boolean;
-};
-
-export type ProjectMenuTarget =
-	| {
-		id: string;
-		label: string;
-		kind: "surface";
-	  }
-	| {
-		id: string;
-		label: string;
-		kind: "folder";
-	  }
-	| {
-		id: string;
-		label: string;
-		kind: "project";
-	  };
-
-export type ProjectContextMenuAction = {
-	id: string;
-	label: string;
-	tone?: "default" | "danger";
-	shortcut?: WorkspaceContextMenuShortcut;
-	children?: readonly ProjectContextMenuAction[];
-};
-
-export type ProjectContextMenuSection = {
-	id: string;
-	label?: string;
-	items: readonly ProjectContextMenuAction[];
-};
-
-export type SidebarItem = {
-	id: string;
-	label: string;
-	icon: ShellIcon;
-	active?: boolean;
-	meta?: string;
-};
-
-export type WorkspaceStaticKind = "workspace" | "home" | "settings";
-
-// Keep this open-ended so future server-driven or plugin-provided item types do
-// not require a frontend source edit before they can be represented safely.
-export type WorkspaceItemTypeId = string;
-
-export type WorkspaceStaticItem = SidebarItem & {
-	contextKind: WorkspaceStaticKind;
-};
-
-export type WorkspaceFolderNode = {
-	id: string;
-	label: string;
-	kind: "folder";
-	icon: ShellIcon;
-	active?: boolean;
-	meta?: string;
-	children?: readonly WorkspaceTreeNode[];
-};
-
-export type WorkspaceItemNode = {
-	id: string;
-	label: string;
-	kind: "item";
-	itemType: WorkspaceItemTypeId;
-	active?: boolean;
-	meta?: string;
-	children?: undefined;
-};
-
-export type WorkspaceTreeNode = WorkspaceFolderNode | WorkspaceItemNode;
-
-export type WorkspaceItemTypeDefinition = {
-	id: WorkspaceItemTypeId;
-	label: string;
-	shortLabel: string;
-	icon: ShellIcon;
-	noun: string;
-	actionPrefix: string;
-	defaultCreateLabel: string;
-	includeInWorkspaceCreate?: boolean;
-	description?: string;
-};
-
-export type SidebarHeaderAction = {
-	id: string;
-	label: string;
-	icon: ShellIcon;
-};
-
-export type TopBarAction = {
-	id: string;
-	label: string;
-	icon: ShellIcon;
-};
-
-export type MobileBottomNavItem = {
-	id: string;
-	label: string;
-	icon: ShellIcon;
-	active?: boolean;
-};
-
-export type WorkspaceContextMenuTarget =
-	| {
-		id: string;
-		label: string;
-		kind: WorkspaceStaticKind;
-	  }
-	| {
-		id: string;
-		label: string;
-		kind: "folder";
-	  }
-	| {
-		id: string;
-		label: string;
-		kind: "item";
-		itemType: WorkspaceItemTypeId;
-	  };
-
-export type WorkspaceContextMenuAction = {
-	id: string;
-	label: string;
-	tone?: "default" | "danger";
-	shortcut?: WorkspaceContextMenuShortcut;
-	children?: readonly WorkspaceContextMenuAction[];
-};
-
-export type WorkspaceContextMenuShortcutModifier = "meta" | "alt" | "shift";
-
-export type WorkspaceContextMenuShortcutKey = "b" | "c" | "d" | "delete" | "enter" | "f" | "m" | "r";
-
-export type WorkspaceContextMenuShortcut = {
-	modifiers?: readonly WorkspaceContextMenuShortcutModifier[];
-	key: WorkspaceContextMenuShortcutKey;
-};
-
-export type WorkspaceContextMenuSection = {
-	id: string;
-	label?: string;
-	items: readonly WorkspaceContextMenuAction[];
-};
-
-export const firstPartyWorkspaceItemTypes: readonly WorkspaceItemTypeDefinition[] = [
-	{
-		id: "core.doc",
-		label: "Doc",
-		shortLabel: "Doc",
-		icon: FileText,
-		noun: "doc",
-		actionPrefix: "doc",
-		defaultCreateLabel: "New doc",
-		includeInWorkspaceCreate: true,
-		description: "Rich text documents and notes.",
-	},
-	{
-		id: "core.board.kanban",
-		label: "Kanban board",
-		shortLabel: "Board",
-		icon: LayoutGrid,
-		noun: "board",
-		actionPrefix: "board",
-		defaultCreateLabel: "New board",
-		includeInWorkspaceCreate: true,
-		description: "Default board-style workspace item.",
-	},
-	{
-		id: "core.board.list",
-		label: "List board",
-		shortLabel: "Board",
-		icon: LayoutGrid,
-		noun: "board",
-		actionPrefix: "list-board",
-		defaultCreateLabel: "New list board",
-		description: "Alternate first-party board view prepared for the future registry.",
-	},
-] as const;
-
-const workspaceItemTypeMap = new Map<WorkspaceItemTypeId, WorkspaceItemTypeDefinition>(
-	firstPartyWorkspaceItemTypes.map((definition) => [definition.id, definition]),
-);
-
-const createUnknownWorkspaceItemTypeDefinition = (
-	itemType: WorkspaceItemTypeId,
-): WorkspaceItemTypeDefinition => ({
-	id: itemType,
-	label: "Item",
-	shortLabel: "Item",
-	icon: FileText,
-	noun: "item",
-	actionPrefix: "item",
-	defaultCreateLabel: "New item",
-	description: "Fallback definition for unknown or future workspace item types.",
-});
-
-export const getWorkspaceItemTypeDefinition = (itemType: WorkspaceItemTypeId): WorkspaceItemTypeDefinition => {
-	return workspaceItemTypeMap.get(itemType) ?? createUnknownWorkspaceItemTypeDefinition(itemType);
-};
-
-export const getWorkspaceNodeIcon = (node: WorkspaceTreeNode): ShellIcon =>
-	node.kind === "folder" ? node.icon : getWorkspaceItemTypeDefinition(node.itemType).icon;
-
-const getWorkspaceCreateActions = (): readonly WorkspaceContextMenuAction[] => [
-	{ id: "new-folder", label: "New folder", shortcut: { modifiers: ["alt"], key: "f" } },
-	...firstPartyWorkspaceItemTypes
-		.filter((definition) => definition.includeInWorkspaceCreate)
-		.map((definition) => ({
-			id: `create-${definition.actionPrefix}`,
-			label: definition.defaultCreateLabel,
-			shortcut:
-				definition.id === "core.board.kanban"
-					? ({ modifiers: ["alt"], key: "b" } as const)
-					: definition.id === "core.doc"
-						? ({ modifiers: ["alt"], key: "d" } as const)
-						: undefined,
-		})),
-];
-
-export const getWorkspaceContextMenuEyebrow = (target: WorkspaceContextMenuTarget): string => {
-	switch (target.kind) {
-		case "workspace":
-		case "home":
-			return "Workspace";
-		case "settings":
-			return "Configuration";
-		case "folder":
-			return "Folder";
-		case "item":
-			return getWorkspaceItemTypeDefinition(target.itemType).shortLabel;
-	}
-};
-
-export const createWorkspaceSurfaceTarget = (workspace: ActiveProject): WorkspaceContextMenuTarget => ({
-	id: `workspace-${workspace.id}`,
-	label: workspace.name,
-	kind: "workspace",
-});
-
-export const createWorkspaceStaticTarget = (item: WorkspaceStaticItem): WorkspaceContextMenuTarget => ({
-	id: item.id,
-	label: item.label,
-	kind: item.contextKind,
-});
-
-export const createWorkspaceTreeTarget = (node: WorkspaceTreeNode): WorkspaceContextMenuTarget => ({
-	id: node.id,
-	label: node.label,
-	...(node.kind === "folder"
-		? { kind: "folder" as const }
-		: {
-			kind: "item" as const,
-			itemType: node.itemType,
-		}),
-});
-
-export type NotificationItem = {
-	id: string;
-	title: string;
-	contextLabel: string;
-	timeLabel: string;
-	unread?: boolean;
-};
-
-export type ProfileMenuAction = {
-	id: string;
-	label: string;
-	icon: ShellIcon;
-	tone?: "default" | "danger";
-};
-
-export type ProfileMenuSection = {
-	id: string;
-	items: readonly ProfileMenuAction[];
-};
-
-export type ActiveUserProfile = {
-	name: string;
-	email: string;
-	roleLabel: string;
-	contextLabel: string;
-};
-
-export const personalDockActions: readonly ServerDockAction[] = [
-	{ id: "account", label: "Account", icon: User },
-	{ id: "settings", label: "Settings", icon: Settings },
-] as const;
-
-export const organizationAdminDockActions: readonly ServerDockAction[] = [
-	{ id: "members", label: "Members", icon: User },
-	{ id: "server", label: "Server", icon: Settings },
-] as const;
-
-// Server shell scaffold data
-export const railItems: readonly RailItem[] = [
-	{ id: "personal-server", label: "Personal Server Name", abbreviation: "P", kind: "personal" },
-	{ id: "organization-server", label: "Organization Name", abbreviation: "O", kind: "organization", active: true },
-	{ id: "design-review", label: "Design Review", abbreviation: "D", kind: "organization" },
-] as const;
-
-export const activeServer: ActiveServer = {
-	id: "organization-server",
-	name: "Organization Name",
-	abbreviation: "O",
-	kind: "organization",
-	connectedLabel: "12 connected",
-	dockActions: organizationAdminDockActions,
-};
-
-// Workspace framing scaffold data
-export const activeProject: ActiveProject = {
-	id: "general",
-	name: "General",
-};
-
-export const activeDepartment: ActiveDepartment = {
-	id: "product",
-	name: "Product",
-	teamName: "Design Systems",
-};
-
-export const projectItems: readonly ProjectItem[] = [
-	{
-		id: "general",
-		name: "General",
-		description: "Default shared project",
-		groupLabel: "Shared space",
-		parentLabel: "Workspace home",
-		meta: "1 workspace",
-		active: true,
-	},
-	{
-		id: "operations",
-		name: "Operations",
-		description: "Cross-team planning and delivery",
-		groupLabel: "Team folders",
-		parentLabel: "Shared Services",
-		meta: "2 workspaces",
-	},
-	{
-		id: "hiring",
-		name: "Hiring",
-		description: "Candidate pipeline and interview loops",
-		groupLabel: "Team folders",
-		parentLabel: "People Ops",
-		meta: "1 workspace",
-	},
-] as const;
-
-export const departmentItems: readonly DepartmentItem[] = [
-	{ id: "product", name: "Product", teams: ["Design Systems", "Research Ops"], active: true },
-	{ id: "engineering", name: "Engineering", teams: ["Platform", "Realtime Collaboration"] },
-	{ id: "operations", name: "Operations", teams: ["Shared Services", "People Ops"] },
-] as const;
-
-// Sidebar and topbar scaffold data
-// These static entries stay pinned in both desktop and mobile workspace navigation.
-export const workspaceStaticItems: readonly WorkspaceStaticItem[] = [
-	{ id: "home", label: "Home", icon: Home, active: true, contextKind: "home" },
-	{ id: "workspace-settings", label: "Settings", icon: Settings, contextKind: "settings" },
-] as const;
-
-// Freeform workspace tree scaffold: folders are structural, while non-folder
-// nodes already flow through the future-safe itemType registry seam.
-export const workspaceTree: readonly WorkspaceTreeNode[] = [
-	{
-		id: "product-workspace",
-		label: "Product",
-		kind: "folder",
-		icon: Folder,
-		children: [
-			{ id: "roadmap-board", label: "Roadmap", kind: "item", itemType: "core.board.kanban", active: true },
-			{ id: "launch-brief", label: "Launch Brief", kind: "item", itemType: "core.doc" },
-			{
-				id: "research-folder",
-				label: "Research",
-				kind: "folder",
-				icon: Folder,
-				children: [
-					{ id: "interviews-doc", label: "Interviews", kind: "item", itemType: "core.doc" },
-					{ id: "signals-board", label: "Signals", kind: "item", itemType: "core.board.kanban", meta: "2" },
-				],
-			},
-		],
-	},
-	{
-		id: "design-folder",
-		label: "Design",
-		kind: "folder",
-		icon: Folder,
-		children: [
-			{ id: "system-doc", label: "Design System", kind: "item", itemType: "core.doc" },
-			{ id: "review-board", label: "Review Queue", kind: "item", itemType: "core.board.kanban" },
-		],
-	},
-	{ id: "general-notes", label: "General Notes", kind: "item", itemType: "core.doc" },
-] as const;
-
-export const workspaceSidebarHeaderActions: readonly SidebarHeaderAction[] = [
-	{ id: "search-workspace", label: "Search workspace", icon: Search },
-] as const;
-
-export const mobileBottomNavItems: readonly MobileBottomNavItem[] = [
-	{ id: "home", label: "Home", icon: Home, active: true },
-	{ id: "search", label: "Search", icon: Search },
-	{ id: "browse", label: "Browse", icon: Folder },
-] as const;
-
-// Initial context-menu IA scaffold. Behavior wiring can evolve later, but the
-// target kinds and action grouping should stay shared across workspace surfaces.
-export const getWorkspaceContextMenuSections = (
-	target: WorkspaceContextMenuTarget,
-): readonly WorkspaceContextMenuSection[] => {
-	const createActions = getWorkspaceCreateActions();
-
-	const createSubmenuAction = {
-		id: "create",
-		label: "Create",
-		children: createActions,
-	} as const;
-
-	switch (target.kind) {
-		case "workspace":
-			return [
-				{
-					id: "create",
-					label: undefined,
-					items: [createSubmenuAction],
-				},
-				{
-					id: "workspace",
-					label: undefined,
-					items: [
-						{ id: "rename-workspace", label: "Rename workspace", shortcut: { key: "enter" } },
-						{ id: "copy-workspace-link", label: "Copy link", shortcut: { modifiers: ["meta"], key: "c" } },
-					],
-				},
-			] as const;
-		case "home":
-			return [
-				{
-					id: "create",
-					label: undefined,
-					items: [createSubmenuAction],
-				},
-				{
-					id: "workspace",
-					label: undefined,
-					items: [{ id: "open-home", label: "Open home", shortcut: { key: "enter" } }],
-				},
-			] as const;
-		case "settings":
-			return [
-				{
-					id: "settings",
-					label: undefined,
-					items: [
-						{ id: "open-settings", label: "Open settings", shortcut: { key: "enter" } },
-						{ id: "copy-settings-link", label: "Copy link", shortcut: { modifiers: ["meta"], key: "c" } },
-					],
-				},
-			] as const;
-		case "folder":
-			return [
-				{
-					id: "open",
-					items: [
-						{ id: "open-folder", label: "Open folder", shortcut: { key: "enter" } },
-						{ id: "rename-folder", label: "Rename", shortcut: { modifiers: ["meta"], key: "r" } },
-					],
-				},
-				{
-					id: "create",
-					label: undefined,
-					items: [createSubmenuAction],
-				},
-				{
-					id: "organize",
-					label: undefined,
-					items: [
-						{ id: "duplicate-folder", label: "Duplicate", shortcut: { modifiers: ["meta"], key: "d" } },
-						{ id: "move-folder", label: "Move", shortcut: { modifiers: ["meta"], key: "m" } },
-						{ id: "delete-folder", label: "Delete", shortcut: { modifiers: ["meta"], key: "delete" }, tone: "danger" },
-					],
-				},
-			] as const;
-		case "item": {
-			const definition = getWorkspaceItemTypeDefinition(target.itemType);
-			const actionPrefix = definition.actionPrefix;
-			const nounLabel = definition.noun;
-
-			return [
-				{
-					id: `${actionPrefix}-primary`,
-					items: [
-						{ id: `open-${actionPrefix}`, label: `Open ${nounLabel}`, shortcut: { key: "enter" } },
-						{ id: `rename-${actionPrefix}`, label: "Rename", shortcut: { modifiers: ["meta"], key: "r" } },
-					],
-				},
-				{
-					id: "organize",
-					label: undefined,
-					items: [
-						{ id: `duplicate-${actionPrefix}`, label: "Duplicate", shortcut: { modifiers: ["meta"], key: "d" } },
-						{ id: `move-${actionPrefix}`, label: "Move", shortcut: { modifiers: ["meta"], key: "m" } },
-						{ id: `delete-${actionPrefix}`, label: "Delete", shortcut: { modifiers: ["meta"], key: "delete" }, tone: "danger" },
-					],
-				},
-			] as const;
-		}
-	}
-};
-
-const getProjectCreateActions = (): readonly ProjectContextMenuAction[] =>
-	[
-		{ id: "new-project", label: "New project" },
-		{ id: "new-folder", label: "New folder" },
-	] as const;
-
-export const createProjectSurfaceTarget = (label = "Projects"): ProjectMenuTarget => ({
-	id: "project-surface",
-	label,
-	kind: "surface",
-});
-
-export const createProjectFolderTarget = (id: string, label: string): ProjectMenuTarget => ({
-	id,
-	label,
-	kind: "folder",
-});
-
-export const createProjectTarget = (project: ProjectItem): ProjectMenuTarget => ({
-	id: project.id,
-	label: project.name,
-	kind: "project",
-});
-
-export const getProjectContextMenuEyebrow = (target: ProjectMenuTarget): string => {
-	switch (target.kind) {
-		case "surface":
-			return "Projects";
-		case "folder":
-			return "Folder";
-		case "project":
-			return "Project";
-	}
-};
-
-export const getProjectContextMenuSections = (target: ProjectMenuTarget): readonly ProjectContextMenuSection[] => {
-	const createActions = getProjectCreateActions();
-
-	switch (target.kind) {
-		case "surface":
-			return [
-				{
-					id: "create",
-					items: createActions,
-				},
-			] as const;
-		case "folder":
-			return [
-				{
-					id: "create",
-					items: createActions,
-				},
-			] as const;
-		case "project":
-			return [
-				{
-					id: "create",
-					items: createActions,
-				},
-			] as const;
-	}
-};
-
-export const topBarActions: readonly TopBarAction[] = [
-	{ id: "search", label: "Search", icon: Search },
-] as const;
-
-export const notificationItems: readonly NotificationItem[] = [
-	{
-		id: "comment-design-systems",
-		title: "New comment on Design Systems",
-		contextLabel: "Product • Review thread updated",
-		timeLabel: "2m ago",
-		unread: true,
-	},
-	{
-		id: "sprint-platform",
-		title: "Sprint updated in Platform",
-		contextLabel: "Engineering • Scope changed",
-		timeLabel: "15m ago",
-		unread: true,
-	},
-	{
-		id: "member-joined",
-		title: "New member joined Operations",
-		contextLabel: "Organization Name • Access granted",
-		timeLabel: "1h ago",
-	},
-	{
-		id: "daily-summary",
-		title: "Daily summary is ready",
-		contextLabel: "General • 8 updates across boards",
-		timeLabel: "Today, 8:00 AM",
-	},
-] as const;
-
-export const unreadNotificationCount = notificationItems.filter((item) => item.unread).length;
-
-export const activeUserProfile: ActiveUserProfile = {
-	name: "Demo Account",
-	email: "demo@moku.work",
-	roleLabel: "Founder · Product",
-	contextLabel: "Organization Name • Design Systems",
-};
-
-export const profileMenuSections: readonly ProfileMenuSection[] = [
-	{
-		id: "account",
-		items: [
-			{ id: "profile", label: "Profile", icon: User },
-			{ id: "account-settings", label: "Account Settings", icon: Settings },
-			{ id: "notifications", label: "Notifications", icon: Bell },
-			{ id: "security", label: "Security", icon: Shield },
-		],
-	},
-	{
-		id: "preferences",
-		items: [
-			{ id: "keyboard-shortcuts", label: "Keyboard Shortcuts", icon: Keyboard },
-			{ id: "theme-preferences", label: "Theme Preferences", icon: Settings },
-			{ id: "help-support", label: "Help & Support", icon: CircleHelp },
-		],
-	},
-	{
-		id: "session",
-		items: [
-			{ id: "switch-account", label: "Switch Account", icon: Repeat },
-			{ id: "sign-out", label: "Sign Out", icon: LogOut, tone: "danger" },
-		],
-	},
-] as const;

Frontend/src/components/top-bar/DepartmentSelector/DepartmentSelector.tsx

@@ -1,7 +1,7 @@
 import { For, createEffect, createSignal, onCleanup, onMount, type JSX } from "solid-js";
 import { ChevronDown } from "../../../lib/icons";
-import { useAppShellData } from "../data/app-shell.context";
-import { type DepartmentItem } from "../data/shell.data";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import { type DepartmentItem } from "../../app-shell/data/shell.data";
 import styles from "./DepartmentSelector.module.scss";
 
 export const DepartmentSelector = (): JSX.Element => {

Frontend/src/components/top-bar/TopBar/NotificationsButton.tsx

@@ -1,6 +1,6 @@
 import type { JSX } from "solid-js";
 import { Bell } from "../../../lib/icons";
-import { unreadNotificationCount } from "../data/shell.data";
+import { unreadNotificationCount } from "../../app-shell/data/shell.data";
 import styles from "./NotificationsButton.module.scss";
 
 type NotificationsButtonProps = {

Frontend/src/components/top-bar/TopBar/NotificationsMenu.tsx

@@ -1,6 +1,6 @@
 import { For, Show, type JSX } from "solid-js";
 import { Bell, Settings } from "../../../lib/icons";
-import { notificationItems, unreadNotificationCount } from "../data/shell.data";
+import { notificationItems, unreadNotificationCount } from "../../app-shell/data/shell.data";
 import styles from "./NotificationsMenu.module.scss";
 
 type NotificationsMenuProps = {

Frontend/src/components/top-bar/TopBar/ProfileMenu.tsx

@@ -1,7 +1,7 @@
 import { For, type JSX } from "solid-js";
 import { User } from "../../../lib/icons";
-import { useAppShellData } from "../data/app-shell.context";
-import { profileMenuSections } from "../data/shell.data";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import { profileMenuSections } from "../../app-shell/data/shell.data";
 import styles from "./ProfileMenu.module.scss";
 
 type ProfileMenuProps = {

Frontend/src/components/top-bar/TopBar/ThemeToggle.tsx

@@ -1,7 +1,7 @@
-// Path: Frontend/src/components/shell/TopBar/ThemeToggle.tsx
+// Path: Frontend/src/components/top-bar/TopBar/ThemeToggle.tsx
 
 import type { JSX } from "solid-js";
-import type { Theme } from "../../../theme/runtime";
+import type { Theme } from "../../../helper/themeRuntime";
 import { Moon, Sun } from "../../../lib/icons";
 import styles from "./ThemeToggle.module.scss";
 

Frontend/src/components/top-bar/TopBar/TopBar.tsx

@@ -1,8 +1,8 @@
-// Path: Frontend/src/components/shell/TopBar/TopBar.tsx
+// Path: Frontend/src/components/top-bar/TopBar/TopBar.tsx
 
 import { For, type JSX } from "solid-js";
-import type { Theme } from "../../../theme/runtime";
-import { topBarActions } from "../data/shell.data";
+import type { Theme } from "../../../helper/themeRuntime";
+import { topBarActions } from "../../app-shell/data/shell.data";
 import { DepartmentSelector } from "../DepartmentSelector/DepartmentSelector";
 import { NotificationsNav } from "./NotificationsNav";
 import { ThemeToggle } from "./ThemeToggle";

Frontend/src/components/top-bar/TopBar/UserNavButton.tsx

@@ -1,4 +1,4 @@
-// Path: Frontend/src/components/shell/TopBar/UserNavButton.tsx
+// Path: Frontend/src/components/top-bar/TopBar/UserNavButton.tsx
 
 import type { JSX } from "solid-js";
 import { User } from "../../../lib/icons";

Frontend/src/components/workspace-home/WorkspaceHome.module.scss

@@ -0,0 +1,25 @@
+/* Path: Frontend/src/components/workspace-home/WorkspaceHome.module.scss */
+
+.viewport {
+  --workspace-content-max-width: var(--content-width-wide);
+
+  min-width: 0;
+  min-height: 0;
+  display: grid;
+  align-content: start;
+  gap: var(--space-4);
+  padding: var(--space-5) var(--space-6);
+}
+
+.title {
+  @include text-display;
+  font-family: var(--font-family-display);
+  max-width: 12ch;
+}
+
+@include respond-down(mobile) {
+  .viewport {
+    gap: var(--space-4);
+    padding: var(--space-4) var(--space-4) calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
+  }
+}

Frontend/src/components/workspace-home/WorkspaceHome.tsx

@@ -0,0 +1,15 @@
+// Path: Frontend/src/components/workspace-home/WorkspaceHome.tsx
+
+import { type JSX } from "solid-js";
+import { useAppShellData } from "../app-shell/data/app-shell.context";
+import styles from "./WorkspaceHome.module.scss";
+
+export const WorkspaceHome = (): JSX.Element => {
+	const appShellData = useAppShellData();
+
+	return (
+		<main class={styles.viewport} data-ui="workspace-home">
+			<h1 class={styles.title}>{appShellData.activeServer().name}</h1>
+		</main>
+	);
+};

Frontend/src/components/workspace-home/WorkspaceHome/WorkspaceHome.tsx

@@ -1,582 +0,0 @@
-// Path: Frontend/src/components/workspace-home/WorkspaceHome/WorkspaceHome.tsx
-
-import { For, Show, createEffect, createMemo, createSignal, type JSX } from "solid-js";
-import { Portal } from "solid-js/web";
-import { createStore } from "solid-js/store";
-import { resolveAPIBase } from "../../../lib/api";
-import { ChevronLeft, ChevronRight } from "../../../lib/icons";
-import { useAppShellData } from "../../shell/data/app-shell.context";
-import styles from "./WorkspaceHome.module.scss";
-
-type BootstrapStepKey = "instance" | "mode" | "admin" | "structure";
-
-type BootstrapStepDefinition = {
-	id: BootstrapStepKey;
-	title: string;
-	buttonLabel: string;
-};
-
-type BootstrapSubmissionState = {
-	status: "idle" | "submitting" | "success" | "error";
-	error: string;
-};
-
-const bootstrapStepDefinitions: readonly BootstrapStepDefinition[] = [
-	{
-		id: "instance",
-		title: "Instance shape",
-		buttonLabel: "Save and continue",
-	},
-	{
-		id: "mode",
-		title: "Server mode",
-		buttonLabel: "Save and continue",
-	},
-	{
-		id: "admin",
-		title: "Admin account",
-		buttonLabel: "Save and continue",
-	},
-	{
-		id: "structure",
-		title: "Initial structure",
-		buttonLabel: "Submit",
-	},
-];
-
-const defaultInstanceForm = {
-	protocol: "http",
-	access: "local",
-	host: "localhost",
-} as const;
-
-const defaultModeForm = {
-	mode: "personal",
-	name: "",
-} as const;
-
-const defaultAdminForm = {
-	displayName: "Admin",
-	email: "admin@example.com",
-	password: "",
-} as const;
-
-const personalStructureDefaults = {
-	departmentName: "Default",
-	teamName: "Personal",
-} as const;
-
-const organizationalStructureDefaults = {
-	departmentName: "Department",
-	teamName: "Team",
-} as const;
-
-const defaultStructureForm = {
-	...personalStructureDefaults,
-	projectName: "Project",
-} as const;
-
-const initialSubmissionState = (): BootstrapSubmissionState => ({
-	status: "idle",
-	error: "",
-});
-
-const readResponseBody = async (response: Response): Promise<unknown> => {
-	const raw = await response.text();
-
-	if (!raw.trim()) {
-		return null;
-	}
-
-	try {
-		return JSON.parse(raw);
-	} catch {
-		return raw;
-	}
-};
-
-const readResponseError = (step: BootstrapStepKey, data: unknown): string => {
-	const fallback = `Bootstrap ${step} request failed.`;
-
-	if (typeof data === "string") {
-		const message = data.trim();
-		return message || fallback;
-	}
-
-	if (!data || typeof data !== "object") {
-		return fallback;
-	}
-
-	const record = data as {
-		error?: string;
-		message?: string;
-		requestId?: string;
-	};
-	const message = typeof record.message === "string" ? record.message.trim() : "";
-	const errorCode = typeof record.error === "string" ? record.error.trim() : "";
-	const requestId = typeof record.requestId === "string" ? record.requestId.trim() : "";
-
-	if (!message && !errorCode && !requestId) {
-		return fallback;
-	}
-
-	const details: string[] = [];
-
-	if (errorCode) {
-		details.push(`code: ${errorCode}`);
-	}
-
-	if (requestId) {
-		details.push(`request: ${requestId}`);
-	}
-
-	if (message && details.length > 0) {
-		return `${message} (${details.join(", ")})`;
-	}
-
-	if (message) {
-		return message;
-	}
-
-	return `${fallback} (${details.join(", ")})`;
-};
-
-type WorkspaceHomeProps = {
-	sidebarCollapsed: boolean;
-	onToggleSidebarCollapse: () => void;
-};
-
-export const WorkspaceHome = (props: WorkspaceHomeProps): JSX.Element => {
-	const appShellData = useAppShellData();
-	const [instanceForm, setInstanceForm] = createStore({ ...defaultInstanceForm });
-	const [modeForm, setModeForm] = createStore({ ...defaultModeForm });
-	const [adminForm, setAdminForm] = createStore({ ...defaultAdminForm });
-	const [structureForm, setStructureForm] = createStore({ ...defaultStructureForm });
-	const [stepState, setStepState] = createStore<Record<BootstrapStepKey, BootstrapSubmissionState>>({
-		instance: initialSubmissionState(),
-		mode: initialSubmissionState(),
-		admin: initialSubmissionState(),
-		structure: initialSubmissionState(),
-	});
-	const [isBootstrapStateResolved, setIsBootstrapStateResolved] = createSignal(false);
-	const [isBootstrapComplete, setIsBootstrapComplete] = createSignal(false);
-	const [isWizardOpen, setIsWizardOpen] = createSignal(false);
-	const [currentStepIndex, setCurrentStepIndex] = createSignal(0);
-
-	createEffect(() => {
-		if (modeForm.mode === "personal") {
-			setStructureForm("departmentName", personalStructureDefaults.departmentName);
-			setStructureForm("teamName", personalStructureDefaults.teamName);
-			return;
-		}
-
-		if (structureForm.departmentName === personalStructureDefaults.departmentName) {
-			setStructureForm("departmentName", organizationalStructureDefaults.departmentName);
-		}
-
-		if (structureForm.teamName === personalStructureDefaults.teamName) {
-			setStructureForm("teamName", organizationalStructureDefaults.teamName);
-		}
-	});
-
-	createEffect(() => {
-		const shellStatus = appShellData.status();
-
-		if (shellStatus === "idle" || shellStatus === "loading") {
-			return;
-		}
-
-		if (shellStatus !== "success") {
-			return;
-		}
-
-		const installationAccessor = appShellData.installation;
-		const installation = typeof installationAccessor === "function" ? installationAccessor() : undefined;
-		const isPersistedBootstrap = installation?.isBootstrapped ?? false;
-
-		if (!isPersistedBootstrap) {
-			resetWizardState();
-		}
-
-		setIsBootstrapComplete(isPersistedBootstrap);
-		setIsWizardOpen(!isPersistedBootstrap);
-		setIsBootstrapStateResolved(true);
-	});
-
-	const sidebarToggleLabel = (): string =>
-		props.sidebarCollapsed ? "Expand left workspace sidebar" : "Collapse left workspace sidebar";
-	const breadcrumb = (): string => `${appShellData.activeServer().name} / ${appShellData.activeProject().name} / Home`;
-	const apiBase = (): string => resolveAPIBase();
-	const bootstrapTargetLabel = (): string =>
-		modeForm.mode === "personal" ? "Personal server" : "Organization server";
-	const bootstrapNamePlaceholder = (): string =>
-		modeForm.mode === "personal" ? "Personal server name" : "Organization server name";
-	const currentStep = createMemo<BootstrapStepDefinition>(
-		() => bootstrapStepDefinitions[currentStepIndex()] ?? bootstrapStepDefinitions[0]!,
-	);
-	const currentStepState = createMemo<BootstrapSubmissionState>(() => stepState[currentStep().id]);
-	const isFirstStep = (): boolean => currentStepIndex() === 0;
-	const isLastStep = (): boolean => currentStepIndex() === bootstrapStepDefinitions.length - 1;
-	const canDismissWizard = (): boolean => isBootstrapComplete();
-
-	const resetWizardState = (): void => {
-		setInstanceForm({ ...defaultInstanceForm });
-		setModeForm({ ...defaultModeForm });
-		setAdminForm({ ...defaultAdminForm });
-		setStructureForm({ ...defaultStructureForm });
-		setStepState({
-			instance: initialSubmissionState(),
-			mode: initialSubmissionState(),
-			admin: initialSubmissionState(),
-			structure: initialSubmissionState(),
-		});
-		setCurrentStepIndex(0);
-	};
-
-	const submitStep = async (step: BootstrapStepKey, payload: unknown): Promise<boolean> => {
-		setStepState(step, { status: "submitting", error: "" });
-
-		try {
-			const response = await fetch(`${apiBase()}/bootstrap/steps/${step}`, {
-				method: "POST",
-				headers: {
-					"Content-Type": "application/json",
-					Accept: "application/json",
-				},
-				body: JSON.stringify(payload),
-			});
-			const data = await readResponseBody(response);
-
-			if (!response.ok) {
-				throw new Error(readResponseError(step, data));
-			}
-
-			setStepState(step, {
-				status: "success",
-				error: "",
-			});
-
-			return true;
-		} catch (error) {
-			setStepState(step, {
-				status: "error",
-				error: error instanceof Error ? error.message : `Bootstrap ${step} request failed.`,
-			});
-
-			return false;
-		}
-	};
-
-	const payloadForStep = (step: BootstrapStepKey): unknown => {
-		switch (step) {
-			case "instance":
-				return instanceForm;
-			case "mode":
-				return modeForm;
-			case "admin":
-				return adminForm;
-			case "structure":
-				return structureForm;
-		}
-	};
-
-	const submitCurrentStep = async (): Promise<void> => {
-		const step = currentStep().id;
-		const didSucceed = await submitStep(step, payloadForStep(step));
-
-		if (!didSucceed) {
-			return;
-		}
-
-		if (isLastStep()) {
-			await appShellData.reload();
-			const installationAccessor = appShellData.installation;
-			const installation = typeof installationAccessor === "function" ? installationAccessor() : undefined;
-			const isPersistedBootstrap = installation?.isBootstrapped ?? false;
-
-			setIsBootstrapComplete(isPersistedBootstrap);
-			setIsWizardOpen(!isPersistedBootstrap);
-			setIsBootstrapStateResolved(true);
-			return;
-		}
-
-		setCurrentStepIndex((index) => Math.min(index + 1, bootstrapStepDefinitions.length - 1));
-	};
-
-	const handleCurrentStepSubmit: JSX.EventHandler<HTMLFormElement, SubmitEvent> = (event): void => {
-		event.preventDefault();
-		void submitCurrentStep();
-	};
-
-	const statusLabel = (state: BootstrapSubmissionState): string => {
-		switch (state.status) {
-			case "submitting":
-				return "Sending";
-			case "success":
-				return "Saved";
-			case "error":
-				return "Request failed";
-			default:
-				return "Ready";
-		}
-	};
-
-	const stepStatusLabel = (step: BootstrapStepDefinition): string => {
-		const state = stepState[step.id];
-
-		if (state.status === "success") {
-			return "Done";
-		}
-
-		if (state.status === "error") {
-			return "Needs retry";
-		}
-
-		return "";
-	};
-
-	return (
-		<>
-			<main class={styles.viewport} data-ui="workspace-home">
-				<div class={styles.workspaceTopBar} data-slot="workspace-home-top-bar">
-					<div class={styles.workspaceTopBarStart} data-slot="workspace-home-top-bar-start">
-						<button
-							type="button"
-							class={styles.workspaceCollapseButton}
-							aria-label={sidebarToggleLabel()}
-							title={sidebarToggleLabel()}
-							data-slot="workspace-home-sidebar-toggle"
-							onClick={props.onToggleSidebarCollapse}
-						>
-							{props.sidebarCollapsed ? <ChevronRight size={16} strokeWidth={2} /> : <ChevronLeft size={16} strokeWidth={2} />}
-						</button>
-					</div>
-
-					<div class={styles.workspaceTopBarCenter} data-slot="workspace-home-top-bar-center">
-						<span class={styles.workspaceBreadcrumb}>{breadcrumb()}</span>
-					</div>
-
-					<div class={styles.workspaceTopBarEnd} data-slot="workspace-home-top-bar-end" aria-hidden="true" />
-				</div>
-
-				<section class={styles.hero} data-slot="workspace-home-hero">
-					<h1 class={styles.title}>{isBootstrapComplete() ? appShellData.activeServer().name : bootstrapTargetLabel()}</h1>
-					<Show when={isBootstrapStateResolved() && !isBootstrapComplete()}>
-						<div class={styles.heroActions}>
-							<button type="button" class={styles.primaryButton} onClick={(): void => setIsWizardOpen(true)}>
-								Open bootstrap wizard
-							</button>
-						</div>
-					</Show>
-				</section>
-			</main>
-
-			<Show when={isBootstrapStateResolved() && isWizardOpen()}>
-				<Portal>
-					<div class={styles.wizardLayer} data-ui="bootstrap-wizard" data-step={currentStep().id}>
-						<div class={styles.wizardBackdrop} aria-hidden="true" />
-
-						<section class={styles.wizardPanel} role="dialog" aria-modal="true" aria-labelledby="bootstrap-wizard-title" data-slot="bootstrap-wizard-panel">
-							<header class={styles.wizardHeader} data-slot="bootstrap-wizard-header">
-								<div class={styles.wizardHeaderCopy}>
-									<h2 id="bootstrap-wizard-title" class={styles.wizardTitle}>
-										Bootstrap {bootstrapTargetLabel()}
-									</h2>
-								</div>
-								<Show when={canDismissWizard()}>
-									<button type="button" class={styles.wizardCloseButton} onClick={(): void => setIsWizardOpen(false)}>
-										Close
-									</button>
-								</Show>
-							</header>
-
-							<div class={styles.wizardBody}>
-								<aside class={styles.wizardSidebar} data-slot="bootstrap-wizard-sidebar">
-									<nav class={styles.wizardSteps} aria-label="Bootstrap steps">
-										<For each={bootstrapStepDefinitions}>
-											{(step, index): JSX.Element => (
-												<button
-													type="button"
-													class={styles.wizardStepButton}
-													data-active={step.id === currentStep().id ? "true" : "false"}
-													disabled={index() > currentStepIndex()}
-													onClick={(): void => {
-														if (index() <= currentStepIndex()) {
-															setCurrentStepIndex(index());
-														}
-													}}
-												>
-													<span class={styles.wizardStepIndex}>{index() + 1}</span>
-													<span class={styles.wizardStepCopy}>
-														<strong>{step.title}</strong>
-														<Show when={stepStatusLabel(step)}>
-															<small>{stepStatusLabel(step)}</small>
-														</Show>
-													</span>
-												</button>
-											)}
-										</For>
-									</nav>
-								</aside>
-
-								<div class={styles.wizardStepPanel} data-slot="bootstrap-wizard-step-panel">
-									<div class={styles.sectionHeader}>
-										<div>
-											<span class={styles.wizardStepEyebrow}>{`Step ${currentStepIndex() + 1} of ${bootstrapStepDefinitions.length}`}</span>
-											<h3 class={styles.sectionTitle}>{currentStep().title}</h3>
-										</div>
-					<div class={styles.statusBadge} data-status={currentStepState().status}>{statusLabel(currentStepState())}</div>
-				</div>
-
-									<form class={styles.form} onSubmit={handleCurrentStepSubmit}>
-										<Show when={currentStep().id === "instance"}>
-											<>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Protocol</span>
-													<select value={instanceForm.protocol} onInput={(event): void => setInstanceForm("protocol", event.currentTarget.value)}>
-														<option value="http">http</option>
-														<option value="https">https</option>
-													</select>
-												</label>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Access</span>
-													<select value={instanceForm.access} onInput={(event): void => setInstanceForm("access", event.currentTarget.value)}>
-														<option value="local">local</option>
-														<option value="remote">remote</option>
-													</select>
-												</label>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Host</span>
-													<input
-														type="text"
-														value={instanceForm.host}
-														onInput={(event): void => setInstanceForm("host", event.currentTarget.value)}
-														placeholder="localhost or app.example.com"
-													/>
-												</label>
-											</>
-										</Show>
-
-						<Show when={currentStep().id === "mode"}>
-							<>
-								<label class={styles.field}>
-									<span class={styles.fieldLabel}>Mode</span>
-									<select value={modeForm.mode} onInput={(event): void => setModeForm("mode", event.currentTarget.value)}>
-										<option value="personal">personal</option>
-										<option value="organizational">organizational</option>
-									</select>
-								</label>
-								<label class={styles.field}>
-									<span class={styles.fieldLabel}>Server name</span>
-									<input
-										type="text"
-										value={modeForm.name}
-										required
-										onInput={(event): void => setModeForm("name", event.currentTarget.value)}
-										placeholder={bootstrapNamePlaceholder()}
-									/>
-								</label>
-							</>
-						</Show>
-
-										<Show when={currentStep().id === "admin"}>
-											<>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Display name</span>
-											<input
-												type="text"
-												value={adminForm.displayName}
-												onInput={(event): void => setAdminForm("displayName", event.currentTarget.value)}
-												placeholder="Admin"
-											/>
-										</label>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Email</span>
-													<input
-														type="email"
-														value={adminForm.email}
-														onInput={(event): void => setAdminForm("email", event.currentTarget.value)}
-														placeholder="admin@example.com"
-													/>
-												</label>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Password</span>
-												<input
-													type="password"
-													value={adminForm.password}
-													onInput={(event): void => setAdminForm("password", event.currentTarget.value)}
-													placeholder="Create a strong password"
-												/>
-												<small class={styles.fieldHelp}>
-													Use at least 12 characters with uppercase, lowercase, numbers, and symbols.
-												</small>
-											</label>
-											</>
-										</Show>
-
-										<Show when={currentStep().id === "structure"}>
-											<>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Department</span>
-													<input
-														type="text"
-														value={structureForm.departmentName}
-														disabled={modeForm.mode === "personal"}
-														onInput={(event): void => setStructureForm("departmentName", event.currentTarget.value)}
-														placeholder={organizationalStructureDefaults.departmentName}
-													/>
-												</label>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Team</span>
-													<input
-														type="text"
-														value={structureForm.teamName}
-														disabled={modeForm.mode === "personal"}
-														onInput={(event): void => setStructureForm("teamName", event.currentTarget.value)}
-														placeholder={organizationalStructureDefaults.teamName}
-													/>
-												</label>
-												<label class={styles.field}>
-													<span class={styles.fieldLabel}>Project</span>
-													<input
-														type="text"
-														value={structureForm.projectName}
-														onInput={(event): void => setStructureForm("projectName", event.currentTarget.value)}
-														placeholder="Moku"
-													/>
-												</label>
-											</>
-										</Show>
-
-										<div class={styles.wizardFormActions}>
-											<button
-												type="button"
-												class={styles.secondaryButton}
-												disabled={isFirstStep()}
-												onClick={(): void => setCurrentStepIndex((index) => Math.max(index - 1, 0))}
-											>
-												Back
-											</button>
-											<button
-												type="submit"
-												class={styles.primaryButton}
-												disabled={currentStepState().status === "submitting"}
-											>
-												{currentStep().buttonLabel}
-											</button>
-										</div>
-									</form>
-
-					<Show when={currentStepState().error}>
-						<p class={styles.errorText}>{currentStepState().error}</p>
-					</Show>
-
-								</div>
-							</div>
-						</section>
-					</div>
-				</Portal>
-			</Show>
-		</>
-	);
-};

Frontend/src/components/workspace-navigation/LeftRail/LeftRail.tsx

@@ -1,8 +1,8 @@
-// Path: Frontend/src/components/shell/LeftRail/LeftRail.tsx
+// Path: Frontend/src/components/workspace-navigation/LeftRail/LeftRail.tsx
 
 import { For, Show, type JSX } from "solid-js";
-import { useAppShellData } from "../data/app-shell.context";
-import { type RailItem } from "../data/shell.data";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import { type RailItem } from "../../app-shell/data/shell.data";
 import styles from "./LeftRail.module.scss";
 
 type RailEntryProps = {

Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.data.ts

@@ -0,0 +1,91 @@
+// Path: Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.data.ts
+
+import type { WorkspaceTreeNode } from "../../app-shell/data/shell.data";
+
+export type MobileWorkspaceBrowserProps = {
+	open: boolean;
+	onClose: VoidFunction;
+};
+
+export type MobileWorkspaceDialogState =
+	| {
+			kind: "text";
+			title: string;
+			message: string;
+			confirmLabel: string;
+			initialValue: string;
+			onConfirm: (value: string) => void;
+	  }
+	| {
+			kind: "confirm";
+			title: string;
+			message: string;
+			confirmLabel: string;
+			tone?: "danger";
+			onConfirm: () => void;
+	  };
+
+export type MobileMoveTargetState = {
+	kind: "folder" | "item";
+	id: string;
+	label: string;
+};
+
+export type MobileMoveDestination = {
+	id: string | null;
+	label: string;
+	depth: number;
+	meta?: string;
+};
+
+export const collectMoveDestinations = (
+	nodes: readonly WorkspaceTreeNode[],
+	movingTarget: MobileMoveTargetState,
+	depth = 0,
+	ancestorBlocked = false,
+): MobileMoveDestination[] => {
+	const destinations: MobileMoveDestination[] = [];
+
+	for (const node of nodes) {
+		if (node.kind !== "folder") {
+			continue;
+		}
+
+		const isBlockedFolder = movingTarget.kind === "folder" && node.id === movingTarget.id;
+		if (!ancestorBlocked && !isBlockedFolder) {
+			destinations.push({
+				id: node.id,
+				label: node.label,
+				depth,
+				meta: "Folder",
+			});
+		}
+
+		destinations.push(
+			...collectMoveDestinations(node.children ?? [], movingTarget, depth + 1, ancestorBlocked || isBlockedFolder),
+		);
+	}
+
+	return destinations;
+};
+
+export const findTreeNodeById = (nodes: readonly WorkspaceTreeNode[], nodeId: string): WorkspaceTreeNode | null => {
+	for (const node of nodes) {
+		if (node.id === nodeId) {
+			return node;
+		}
+
+		if (node.kind !== "folder") {
+			continue;
+		}
+
+		const nestedMatch = findTreeNodeById(node.children ?? [], nodeId);
+		if (nestedMatch) {
+			return nestedMatch;
+		}
+	}
+
+	return null;
+};
+
+export const isDangerDialogState = (state: MobileWorkspaceDialogState): boolean => state.kind === "confirm" && state.tone === "danger";

Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.hook.ts

@@ -0,0 +1,273 @@
+// Path: Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.hook.ts
+
+import { createSignal } from "solid-js";
+import { createLongPressGesture } from "../../../helper/createLongPressGesture";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import {
+	createWorkspaceSurfaceTarget,
+	getWorkspaceItemTypeDefinition,
+	type WorkspaceContextMenuAction,
+	type WorkspaceContextMenuTarget,
+	type WorkspaceItemTypeId,
+} from "../../app-shell/data/shell.data";
+import { useWorkspaceTreeData } from "../shared/useWorkspaceTreeData";
+import {
+	collectMoveDestinations,
+	findTreeNodeById,
+	type MobileMoveDestination,
+	type MobileMoveTargetState,
+	type MobileWorkspaceDialogState,
+} from "./MobileWorkspaceBrowser.data";
+
+export const useMobileWorkspaceBrowser = () => {
+	const appShellData = useAppShellData();
+	const [actionSheetTarget, setActionSheetTarget] = createSignal<WorkspaceContextMenuTarget | null>(null);
+	const [dialogState, setDialogState] = createSignal<MobileWorkspaceDialogState | null>(null);
+	const [dialogValue, setDialogValue] = createSignal("");
+	const [moveTarget, setMoveTarget] = createSignal<MobileMoveTargetState | null>(null);
+	const { workspaceTreeNodes, createFolder, renameFolder, deleteFolder, moveFolder, createItem, deleteItem, moveItem } = useWorkspaceTreeData({
+		activeProjectId: () => appShellData.activeProject().id,
+		fallbackWorkspaceTree: () => appShellData.workspaceTree(),
+	});
+	const workspaceTarget = () => createWorkspaceSurfaceTarget(appShellData.activeProject());
+
+	const moveDestinations = (): MobileMoveDestination[] => {
+		const target = moveTarget();
+		if (!target) {
+			return [];
+		}
+
+		return [{ id: null, label: "Items root", depth: 0, meta: "Root" }, ...collectMoveDestinations(workspaceTreeNodes(), target)];
+	};
+
+	const resolveCreateItemType = (actionId: string): WorkspaceItemTypeId | null => {
+		switch (actionId) {
+			case "create-doc":
+				return "core.doc";
+			case "create-board":
+				return "core.board.kanban";
+			case "create-list-board":
+				return "core.board.list";
+			default:
+				return null;
+		}
+	};
+
+	const createPersistedItem = (itemType: WorkspaceItemTypeId, parentId: string | null): void => {
+		const definition = getWorkspaceItemTypeDefinition(itemType);
+		void createItem(definition.defaultCreateLabel, itemType, parentId);
+	};
+
+	const openActionSheet = (target: WorkspaceContextMenuTarget): void => {
+		setActionSheetTarget(target);
+	};
+
+	const closeActionSheet = (): void => {
+		setActionSheetTarget(null);
+	};
+
+	const closeMoveSheet = (): void => {
+		setMoveTarget(null);
+	};
+
+	const openWorkspaceActionSheet = (): void => {
+		openActionSheet(workspaceTarget());
+	};
+
+	const closeDialog = (): void => {
+		setDialogState(null);
+		setDialogValue("");
+	};
+
+	const openMoveSheet = (target: MobileMoveTargetState): void => {
+		setMoveTarget(target);
+	};
+
+	const openTextDialog = (config: Omit<Extract<MobileWorkspaceDialogState, { kind: "text" }>, "kind">): void => {
+		setDialogValue(config.initialValue);
+		setDialogState({ kind: "text", ...config });
+	};
+
+	const openConfirmDialog = (config: Omit<Extract<MobileWorkspaceDialogState, { kind: "confirm" }>, "kind">): void => {
+		setDialogValue("");
+		setDialogState({ kind: "confirm", ...config });
+	};
+
+	const submitDialog = (): void => {
+		const state = dialogState();
+		if (!state) {
+			return;
+		}
+
+		if (state.kind === "text") {
+			const value = dialogValue().trim();
+			if (!value) {
+				return;
+			}
+
+			closeDialog();
+			state.onConfirm(value);
+			return;
+		}
+
+		closeDialog();
+		state.onConfirm();
+	};
+
+	const handleMoveDestinationSelect = (destinationId: string | null): void => {
+		const target = moveTarget();
+		if (!target) {
+			return;
+		}
+
+		const destinationNode = destinationId ? findTreeNodeById(workspaceTreeNodes(), destinationId) : null;
+		const targetIndex = destinationNode?.kind === "folder"
+			? destinationNode.children?.length ?? 0
+			: destinationId
+				? 0
+				: workspaceTreeNodes().length;
+
+		closeMoveSheet();
+
+		if (target.kind === "folder") {
+			void moveFolder(target.id, destinationId, targetIndex);
+			return;
+		}
+
+		void moveItem(target.id, destinationId, targetIndex);
+	};
+
+	const handleActionSelect = (action: WorkspaceContextMenuAction, target: WorkspaceContextMenuTarget): void => {
+		const createItemType = resolveCreateItemType(action.id);
+		if (createItemType) {
+			switch (target.kind) {
+				case "workspace":
+				case "home":
+					createPersistedItem(createItemType, null);
+					return;
+				case "folder":
+					createPersistedItem(createItemType, target.id);
+					return;
+				case "settings":
+				case "item":
+					return;
+			}
+		}
+
+		switch (action.id) {
+			case "new-folder": {
+				if (target.kind === "settings" || target.kind === "item") {
+					return;
+				}
+
+				openTextDialog({
+					title: "New folder",
+					message: target.kind === "folder" ? `Create a folder inside "${target.label}".` : "Create a folder at the root of Items.",
+					confirmLabel: "Create",
+					initialValue: "Untitled folder",
+					onConfirm: (name) => {
+						void createFolder(name, target.kind === "folder" ? target.id : null);
+					},
+				});
+				return;
+			}
+			case "rename-folder": {
+				if (target.kind !== "folder") {
+					return;
+				}
+
+				openTextDialog({
+					title: "Rename folder",
+					message: `Update the name for "${target.label}".`,
+					confirmLabel: "Save",
+					initialValue: target.label,
+					onConfirm: (name) => {
+						if (name === target.label) {
+							return;
+						}
+						void renameFolder(target.id, name);
+					},
+				});
+				return;
+			}
+			case "move-folder": {
+				if (target.kind !== "folder") {
+					return;
+				}
+
+				openMoveSheet({ kind: "folder", id: target.id, label: target.label });
+				return;
+			}
+			case "delete-folder": {
+				if (target.kind !== "folder") {
+					return;
+				}
+
+				openConfirmDialog({
+					title: "Delete folder?",
+					message: `"${target.label}" and everything inside it will be removed.`,
+					confirmLabel: "Delete",
+					tone: "danger",
+					onConfirm: () => {
+						void deleteFolder(target.id);
+					},
+				});
+				return;
+			}
+			case "move-doc":
+			case "move-board":
+			case "move-list-board": {
+				if (target.kind !== "item") {
+					return;
+				}
+
+				openMoveSheet({ kind: "item", id: target.id, label: target.label });
+				return;
+			}
+			case "delete-doc":
+			case "delete-board":
+			case "delete-list-board": {
+				if (target.kind !== "item") {
+					return;
+				}
+
+				openConfirmDialog({
+					title: "Delete item?",
+					message: `"${target.label}" will be removed from the project tree.`,
+					confirmLabel: "Delete",
+					tone: "danger",
+					onConfirm: () => {
+						void deleteItem(target.id);
+					},
+				});
+				return;
+			}
+			default:
+				return;
+		}
+	};
+
+	const workspaceLongPress = createLongPressGesture({
+		onLongPress: openWorkspaceActionSheet,
+	});
+
+	return {
+		appShellData,
+		actionSheetTarget,
+		openActionSheet,
+		closeActionSheet,
+		dialogState,
+		dialogValue,
+		setDialogValue,
+		closeDialog,
+		submitDialog,
+		moveTarget,
+		moveDestinations,
+		closeMoveSheet,
+		handleMoveDestinationSelect,
+		workspaceTreeNodes,
+		handleActionSelect,
+		workspaceLongPress,
+		openWorkspaceActionSheet,
+	};
+};

Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.module.scss

@@ -0,0 +1,414 @@
+.browserLayer {
+  display: none;
+}
+
+@include respond-down(mobile) {
+  .browserLayer {
+    position: fixed;
+    inset: 0;
+    display: grid;
+    z-index: calc(var(--z-popover, 20) + 2);
+    background: color-mix(in srgb, var(--color-canvas) 96%, black 4%);
+  }
+
+	.sheet {
+    height: 100dvh;
+    display: grid;
+    grid-template-rows: auto minmax(0, 1fr);
+    background:
+      linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 84%, transparent) 0%, transparent 8rem),
+      color-mix(in srgb, var(--color-canvas) 97%, black 3%);
+    overflow: hidden;
+  }
+
+  .sheetHeader {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: var(--space-3);
+    padding: calc(var(--space-5) + env(safe-area-inset-top, 0px)) var(--space-4) var(--space-4);
+    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 84%, transparent);
+  }
+
+  .headerActions {
+    display: inline-flex;
+    align-items: center;
+    gap: var(--space-2);
+  }
+
+  .brandBlock {
+    min-width: 0;
+    display: grid;
+    gap: var(--space-1);
+  }
+
+  .sectionLabel {
+    @include text-caption;
+    color: var(--color-text-muted);
+    text-transform: uppercase;
+    letter-spacing: 0.06em;
+  }
+
+  .brandEyebrow {
+    @include text-caption;
+    color: var(--color-text-muted);
+    text-transform: uppercase;
+    letter-spacing: 0.08em;
+  }
+
+  .brandTitle {
+    @include text-title;
+    color: var(--color-text);
+    font-weight: var(--font-weight-semibold);
+  }
+
+  .brandContext {
+    @include text-caption;
+    color: var(--color-text-subtle);
+  }
+
+  .closeButton {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: var(--control-size-md);
+    height: var(--control-size-md);
+    padding: 0;
+    border: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
+    border-radius: 999px;
+    background: color-mix(in srgb, var(--color-surface) 92%, transparent);
+    color: var(--color-text-subtle);
+  }
+
+  .createButton {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-2);
+    min-height: var(--control-size-md);
+    padding: 0 var(--space-3);
+    border: 1px solid color-mix(in srgb, var(--color-border-strong, var(--color-border)) 82%, transparent);
+    border-radius: 999px;
+    background: color-mix(in srgb, var(--color-surface) 94%, var(--color-canvas) 6%);
+    color: var(--color-text);
+    box-shadow: var(--shadow-soft);
+    font: inherit;
+    font-weight: var(--font-weight-semibold);
+  }
+
+  .sheetBody {
+    min-height: 0;
+    display: flex;
+    flex-direction: column;
+    align-items: stretch;
+    gap: var(--space-5);
+    padding: var(--space-5) var(--space-5) calc(var(--space-12) + var(--space-10) + env(safe-area-inset-bottom, 0px));
+    overflow-y: auto;
+    overflow-x: hidden;
+    overscroll-behavior: contain;
+    -webkit-overflow-scrolling: touch;
+  }
+
+  .sectionBlock {
+    display: grid;
+    gap: var(--space-2);
+    flex: 0 0 auto;
+  }
+
+  .treeList,
+  .treeListItem {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+  }
+
+  .treeList {
+    display: grid;
+    gap: 0;
+    border-top: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
+  }
+
+  .treeListNested {
+    display: grid;
+    gap: 0;
+  }
+
+  .treeRow {
+    min-width: 0;
+    width: 100%;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: var(--space-3);
+    min-height: calc(var(--control-size-lg) + var(--space-3));
+    padding: var(--space-4) var(--space-2) var(--space-4) calc(var(--space-2) + (var(--tree-depth, 0) * var(--space-4)));
+    border: 0;
+    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
+    border-radius: 0;
+    background: transparent;
+    color: var(--color-text);
+    text-align: left;
+  }
+
+  .treeRowActive {
+    color: var(--color-text);
+    background: color-mix(in srgb, var(--color-surface) 72%, transparent);
+  }
+
+  .treeRowBranch {
+    font-weight: var(--font-weight-semibold);
+  }
+
+  .treeRowLead,
+  .treeRowTrail {
+    min-width: 0;
+    display: inline-flex;
+    align-items: center;
+    gap: var(--space-2);
+  }
+
+  .treeRowTrail {
+    flex: 0 0 auto;
+    color: var(--color-text-muted);
+  }
+
+  .treeLabel {
+    @include text-label;
+    min-width: 0;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .treeMeta {
+    @include text-caption;
+    min-width: 1rem;
+    text-align: right;
+  }
+
+  .treeChevron {
+    color: var(--color-text-subtle);
+  }
+
+  .treeListNested > .treeListItem > .treeRow {
+     min-height: calc(var(--control-size-lg) + var(--space-1));
+  }
+
+	.dialogLayer {
+		position: fixed;
+		inset: 0;
+		display: grid;
+		place-items: center;
+		z-index: calc(var(--z-modal, 30) + 2);
+		padding: var(--space-5);
+	}
+
+	.dialogBackdrop {
+		position: absolute;
+		inset: 0;
+		border: 0;
+		background: color-mix(in srgb, black 56%, transparent);
+	}
+
+	.dialogCard {
+		position: relative;
+		width: min(100%, 28rem);
+		display: grid;
+		gap: var(--space-4);
+		padding: var(--space-4);
+		border: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+		border-radius: var(--radius-xl);
+		background: color-mix(in srgb, var(--color-surface) 94%, var(--color-canvas) 6%);
+		box-shadow: var(--shadow-strong);
+	}
+
+	.dialogCopy {
+		display: grid;
+		gap: var(--space-2);
+	}
+
+	.dialogTitle {
+		@include text-title;
+		color: var(--color-text);
+		font-weight: var(--font-weight-semibold);
+	}
+
+	.dialogMessage {
+		@include text-body;
+		margin: 0;
+		color: var(--color-text-subtle);
+	}
+
+	.dialogInput {
+		width: 100%;
+		min-height: var(--control-size-lg);
+		padding: 0 var(--space-3);
+		border: 1px solid color-mix(in srgb, var(--color-border-strong, var(--color-border)) 82%, transparent);
+		border-radius: var(--radius-lg);
+		background: color-mix(in srgb, var(--color-canvas) 92%, var(--color-surface) 8%);
+		color: var(--color-text);
+		font: inherit;
+	}
+
+	.moveSheetLayer {
+		position: fixed;
+		inset: 0;
+		display: block;
+		z-index: calc(var(--z-modal, 30) + 2);
+	}
+
+	.moveSheet {
+		position: absolute;
+		right: 0;
+		bottom: 0;
+		left: 0;
+		max-height: calc(100dvh - (var(--space-12) * 2));
+		display: grid;
+		gap: var(--space-3);
+		padding: var(--space-3) var(--space-3) calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
+		border-top: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+		border-radius: var(--radius-xl) var(--radius-xl) 0 0;
+		background: var(--color-surface);
+		box-shadow: var(--shadow-strong);
+		overflow: auto;
+	}
+
+	.moveSheetHandle {
+		width: var(--space-10);
+		height: var(--space-1);
+		margin: 0 auto;
+		border-radius: var(--radius-pill);
+		background: color-mix(in srgb, var(--color-text-muted) 24%, transparent);
+	}
+
+	.moveSheetHeader {
+		display: grid;
+		gap: var(--space-2);
+		padding-bottom: var(--space-3);
+		border-bottom: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+	}
+
+	.moveSheetHeaderCopy {
+		display: grid;
+		gap: calc(var(--space-1) / 2);
+	}
+
+	.moveSheetEyebrow {
+		@include text-caption;
+		color: var(--color-text-muted);
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+	}
+
+	.moveSheetTitle {
+		@include text-title;
+		color: var(--color-text);
+		font-weight: var(--font-weight-semibold);
+	}
+
+	.moveSheetMessage {
+		@include text-body;
+		margin: 0;
+		color: var(--color-text-subtle);
+	}
+
+	.moveSection {
+		display: grid;
+		gap: var(--space-2);
+	}
+
+	.moveSectionLabel {
+		@include text-caption;
+		padding-inline: var(--space-1);
+		color: var(--color-text-muted);
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+	}
+
+	.moveDestinationList {
+		display: grid;
+		overflow: hidden;
+		border: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+		border-radius: var(--radius-lg);
+		background: color-mix(in srgb, var(--color-surface) 88%, var(--color-surface-elevated, var(--color-surface)) 12%);
+		max-height: min(20rem, 45vh);
+		overflow-y: auto;
+	}
+
+	.moveDestinationButton {
+		width: 100%;
+		display: flex;
+		align-items: center;
+		justify-content: space-between;
+		gap: var(--space-3);
+		min-height: calc(var(--control-size-lg) + var(--space-2));
+		padding: 0 var(--space-3);
+		padding-left: calc(var(--space-3) + (var(--move-depth, 0) * var(--space-4)));
+		border: 0;
+		background: transparent;
+		color: var(--color-text);
+		text-align: left;
+	}
+
+	.moveDestinationButton:active {
+		background: color-mix(in srgb, var(--color-text) 6%, transparent);
+	}
+
+	.moveDestinationButton + .moveDestinationButton {
+		border-top: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
+	}
+
+	.moveDestinationLabel {
+		@include text-label;
+		min-width: 0;
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+	}
+
+	.moveDestinationMeta {
+		@include text-caption;
+		color: var(--color-text-muted);
+		flex: 0 0 auto;
+	}
+
+	.moveSheetFooter {
+		display: flex;
+		justify-content: flex-end;
+		padding-top: var(--space-2);
+		border-top: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+	}
+
+	.dialogActions {
+		display: flex;
+		justify-content: flex-end;
+		gap: var(--space-2);
+	}
+
+	.dialogSecondaryButton,
+	.dialogPrimaryButton {
+		min-height: var(--control-size-md);
+		padding: 0 var(--space-3);
+		border-radius: 999px;
+		font: inherit;
+		font-weight: var(--font-weight-semibold);
+	}
+
+	.dialogSecondaryButton {
+		border: 1px solid color-mix(in srgb, var(--color-border) 88%, transparent);
+		background: color-mix(in srgb, var(--color-surface) 92%, transparent);
+		color: var(--color-text-subtle);
+	}
+
+	.dialogPrimaryButton {
+		border: 1px solid color-mix(in srgb, var(--color-border-strong, var(--color-border)) 82%, transparent);
+		background: color-mix(in srgb, var(--color-text) 10%, var(--color-surface) 90%);
+		color: var(--color-text);
+	}
+
+	.dialogDangerButton {
+		border-color: color-mix(in srgb, var(--color-danger-border, var(--color-border-strong, var(--color-border))) 82%, transparent);
+		background: color-mix(in srgb, var(--color-danger-text, #b42318) 12%, var(--color-surface) 88%);
+		color: var(--color-danger-text, #b42318);
+	}
+}

Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.parts.tsx

@@ -0,0 +1,140 @@
+// Path: Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.parts.tsx
+
+import { For, Show, type JSX } from "solid-js";
+import { ChevronRight } from "../../../lib/icons";
+import { createLongPressGesture } from "../../../helper/createLongPressGesture";
+import {
+	createWorkspaceStaticTarget,
+	createWorkspaceTreeTarget,
+	getWorkspaceNodeIcon,
+	type SidebarItem,
+	type WorkspaceContextMenuTarget,
+	type WorkspaceStaticItem,
+	type WorkspaceTreeNode,
+} from "../../app-shell/data/shell.data";
+import styles from "./MobileWorkspaceBrowser.module.scss";
+
+export const TreeRow = (props: { node: WorkspaceTreeNode; depth?: number }): JSX.Element => {
+	const depth = props.depth ?? 0;
+	const Icon = getWorkspaceNodeIcon(props.node);
+	const hasChildren = (props.node.children?.length ?? 0) > 0;
+
+	return (
+		<button
+			classList={{
+				[styles.treeRow]: true,
+				[styles.treeRowActive]: props.node.active ?? false,
+				[styles.treeRowBranch]: hasChildren,
+			}}
+			type="button"
+			style={{ "--tree-depth": `${depth}` }}
+			data-slot="mobile-workspace-tree-row"
+			data-kind={props.node.kind}
+			data-item-type={props.node.kind === "item" ? props.node.itemType : undefined}
+			data-active={props.node.active ? "true" : "false"}
+		>
+			<span class={styles.treeRowLead}>
+				<Icon size={16} strokeWidth={2} />
+				<span class={styles.treeLabel}>{props.node.label}</span>
+			</span>
+
+			<span class={styles.treeRowTrail}>
+				<Show when={props.node.meta}>
+					<span class={styles.treeMeta}>{props.node.meta}</span>
+				</Show>
+				<Show when={hasChildren}>
+					<ChevronRight size={14} strokeWidth={2} class={styles.treeChevron} />
+				</Show>
+			</span>
+		</button>
+	);
+};
+
+export const StaticRow = (props: { item: SidebarItem }): JSX.Element => {
+	const Icon = props.item.icon;
+
+	return (
+		<button classList={{ [styles.treeRow]: true, [styles.treeRowActive]: props.item.active ?? false }} type="button" style={{ "--tree-depth": "0" }} data-slot="mobile-workspace-static-row" data-active={props.item.active ? "true" : "false"}>
+			<span class={styles.treeRowLead}>
+				<Icon size={16} strokeWidth={2} />
+				<span class={styles.treeLabel}>{props.item.label}</span>
+			</span>
+			<span class={styles.treeRowTrail}>
+				<Show when={props.item.meta}>
+					<span class={styles.treeMeta}>{props.item.meta}</span>
+				</Show>
+				<ChevronRight size={14} strokeWidth={2} class={styles.treeChevron} />
+			</span>
+		</button>
+	);
+};
+
+export const WorkspaceStaticRow = (props: {
+	item: WorkspaceStaticItem;
+	onOpenActionSheet: (target: WorkspaceContextMenuTarget) => void;
+}): JSX.Element => {
+	const target = createWorkspaceStaticTarget(props.item);
+	const longPress = createLongPressGesture({
+		onLongPress: () => {
+			props.onOpenActionSheet(target);
+		},
+	});
+
+	return (
+		<li
+			class={styles.treeListItem}
+			data-slot="mobile-workspace-static-item"
+			data-target-kind={target.kind}
+			onContextMenu={(event): void => {
+				event.preventDefault();
+				props.onOpenActionSheet(target);
+			}}
+			{...longPress}
+		>
+			<StaticRow item={props.item} />
+		</li>
+	);
+};
+
+export const WorkspaceTreeBranch = (props: {
+	nodes: readonly WorkspaceTreeNode[];
+	depth?: number;
+	onOpenActionSheet: (target: WorkspaceContextMenuTarget) => void;
+}): JSX.Element => {
+	const depth = props.depth ?? 0;
+
+	return (
+		<For each={props.nodes}>
+			{(node): JSX.Element => {
+				const target = createWorkspaceTreeTarget(node);
+				const longPress = createLongPressGesture({
+					onLongPress: () => {
+						props.onOpenActionSheet(target);
+					},
+				});
+
+				return (
+					<li
+						class={styles.treeListItem}
+						data-slot="mobile-workspace-tree-item"
+						data-kind={node.kind}
+						data-item-type={node.kind === "item" ? node.itemType : undefined}
+						onContextMenu={(event): void => {
+							event.preventDefault();
+							props.onOpenActionSheet(target);
+						}}
+						{...longPress}
+					>
+						<TreeRow node={node} depth={depth} />
+
+						<Show when={node.children?.length}>
+							<ul class={styles.treeListNested}>
+								<WorkspaceTreeBranch nodes={node.children ?? []} depth={depth + 1} onOpenActionSheet={props.onOpenActionSheet} />
+							</ul>
+						</Show>
+					</li>
+				);
+			}}
+		</For>
+	);
+};

Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.tsx

@@ -0,0 +1,192 @@
+import { For, Show, type JSX } from "solid-js";
+import { Portal } from "solid-js/web";
+import { Plus, X } from "../../../lib/icons";
+import {
+	workspaceStaticItems,
+} from "../../app-shell/data/shell.data";
+import { WorkspaceMobileActionSheet } from "../WorkspaceMobileActionSheet/WorkspaceMobileActionSheet";
+import { useMobileWorkspaceBrowser } from "./MobileWorkspaceBrowser.hook";
+import { isDangerDialogState, type MobileWorkspaceBrowserProps } from "./MobileWorkspaceBrowser.data";
+import { WorkspaceStaticRow, WorkspaceTreeBranch } from "./MobileWorkspaceBrowser.parts";
+import styles from "./MobileWorkspaceBrowser.module.scss";
+
+export const MobileWorkspaceBrowser = (props: MobileWorkspaceBrowserProps): JSX.Element => {
+	const {
+		appShellData,
+		actionSheetTarget,
+		openActionSheet,
+		closeActionSheet,
+		dialogState,
+		dialogValue,
+		setDialogValue,
+		closeDialog,
+		submitDialog,
+		moveTarget,
+		moveDestinations,
+		closeMoveSheet,
+		handleMoveDestinationSelect,
+		workspaceTreeNodes,
+		handleActionSelect,
+		workspaceLongPress,
+		openWorkspaceActionSheet,
+	} = useMobileWorkspaceBrowser();
+
+	return (
+		<Show when={props.open}>
+			<div class={styles.browserLayer} data-ui="mobile-workspace-browser">
+				<section class={styles.sheet} aria-label="Mobile workspace browser" data-slot="mobile-workspace-sheet">
+					<header class={styles.sheetHeader} data-slot="mobile-workspace-header">
+						<div
+							class={styles.brandBlock}
+							data-slot="mobile-workspace-brand"
+							onContextMenu={(event): void => {
+								event.preventDefault();
+								openWorkspaceActionSheet();
+							}}
+							{...workspaceLongPress}
+						>
+							{/* Long-pressing the browser header exposes workspace-level actions on mobile. */}
+							<span class={styles.brandEyebrow}>Moku Work</span>
+							<strong class={styles.brandTitle}>{appShellData.activeProject().name}</strong>
+							<span class={styles.brandContext}>{appShellData.activeServer().name}</span>
+						</div>
+
+						<div class={styles.headerActions} data-slot="mobile-workspace-header-actions">
+							<button
+								class={styles.createButton}
+								type="button"
+								aria-label="Create"
+								data-slot="mobile-workspace-create"
+								onClick={openWorkspaceActionSheet}
+							>
+								<Plus size={16} strokeWidth={2.25} />
+								<span>Create</span>
+							</button>
+
+							<button class={styles.closeButton} type="button" aria-label="Close workspace browser" data-slot="mobile-workspace-close" onClick={props.onClose}>
+								<X size={18} strokeWidth={2} />
+							</button>
+						</div>
+					</header>
+
+					<div class={styles.sheetBody} data-slot="mobile-workspace-body">
+						<section class={styles.sectionBlock} data-slot="mobile-workspace-section" data-section-id="workspace">
+							<span class={styles.sectionLabel}>Workspace</span>
+							<ul class={styles.treeList} data-slot="mobile-workspace-list" data-section-id="workspace">
+								<For each={workspaceStaticItems}>
+									{(item): JSX.Element => <WorkspaceStaticRow item={item} onOpenActionSheet={openActionSheet} />}
+								</For>
+							</ul>
+						</section>
+
+						<section class={styles.sectionBlock} data-slot="mobile-workspace-section" data-section-id="items">
+							<span class={styles.sectionLabel}>Items</span>
+							<ul class={styles.treeList} data-slot="mobile-workspace-list" data-section-id="items">
+								<WorkspaceTreeBranch nodes={workspaceTreeNodes()} onOpenActionSheet={openActionSheet} />
+							</ul>
+						</section>
+					</div>
+				</section>
+
+				<WorkspaceMobileActionSheet target={actionSheetTarget()} onClose={closeActionSheet} onSelect={handleActionSelect} />
+
+				<Show when={moveTarget()}>
+					{(state): JSX.Element => (
+						<Portal>
+							<div class={styles.moveSheetLayer} data-ui="mobile-workspace-move-sheet">
+								<button class={styles.dialogBackdrop} type="button" aria-label="Close move sheet" onClick={closeMoveSheet} />
+								<section class={styles.moveSheet} aria-label={`Move ${state().label}`}>
+									<div class={styles.moveSheetHandle} aria-hidden="true" />
+									<div class={styles.moveSheetHeader}>
+										<div class={styles.moveSheetHeaderCopy}>
+											<span class={styles.moveSheetEyebrow}>Move {state().kind}</span>
+											<strong class={styles.moveSheetTitle}>{state().label}</strong>
+											<p class={styles.moveSheetMessage}>Choose a new location in the project tree.</p>
+										</div>
+									</div>
+
+									<div class={styles.moveSection}>
+										<span class={styles.moveSectionLabel}>Destination</span>
+										<div class={styles.moveDestinationList}>
+											<For each={moveDestinations()}>
+												{(destination): JSX.Element => (
+													<button
+														type="button"
+														class={styles.moveDestinationButton}
+														style={{ "--move-depth": `${destination.depth}` }}
+														onClick={(): void => handleMoveDestinationSelect(destination.id)}
+													>
+														<span class={styles.moveDestinationLabel}>{destination.label}</span>
+														<Show when={destination.meta}>
+															<span class={styles.moveDestinationMeta}>{destination.meta}</span>
+														</Show>
+													</button>
+												)}
+											</For>
+										</div>
+									</div>
+
+									<div class={styles.moveSheetFooter}>
+										<button class={styles.dialogSecondaryButton} type="button" onClick={closeMoveSheet}>
+											Cancel
+										</button>
+									</div>
+								</section>
+							</div>
+						</Portal>
+					)}
+				</Show>
+
+				<Show when={dialogState()}>
+					{(state): JSX.Element => (
+						<Portal>
+							<div class={styles.dialogLayer} data-ui="mobile-workspace-dialog">
+								<button class={styles.dialogBackdrop} type="button" aria-label="Close dialog" onClick={closeDialog} />
+								<section class={styles.dialogCard} aria-label={state().title}>
+									<div class={styles.dialogCopy}>
+										<strong class={styles.dialogTitle}>{state().title}</strong>
+										<p class={styles.dialogMessage}>{state().message}</p>
+									</div>
+
+									<Show when={state().kind === "text"}>
+										<input
+											class={styles.dialogInput}
+											type="text"
+											value={dialogValue()}
+											onInput={(event): void => {
+												setDialogValue(event.currentTarget.value);
+											}}
+											onKeyDown={(event): void => {
+												if (event.key === "Enter") {
+													event.preventDefault();
+													submitDialog();
+												}
+											}}
+											autofocus
+										/>
+									</Show>
+
+									<div class={styles.dialogActions}>
+										<button class={styles.dialogSecondaryButton} type="button" onClick={closeDialog}>
+											Cancel
+										</button>
+										<button
+											classList={{
+												[styles.dialogPrimaryButton]: true,
+												[styles.dialogDangerButton]: isDangerDialogState(state()),
+											}}
+											type="button"
+											onClick={submitDialog}
+										>
+											{state().confirmLabel}
+										</button>
+									</div>
+								</section>
+							</div>
+						</Portal>
+					)}
+				</Show>
+			</div>
+		</Show>
+	);
+};

Frontend/src/components/workspace-navigation/ProjectContextMenu/ProjectContextMenu.tsx

@@ -7,7 +7,7 @@ import {
 	type ProjectContextMenuAction,
 	type ProjectMenuTarget,
 	type WorkspaceContextMenuShortcut,
-} from "../data/shell.data";
+} from "../../app-shell/data/shell.data";
 import styles from "../WorkspaceContextMenu/WorkspaceContextMenu.module.scss";
 
 type ShortcutPlatform = "mac" | "windows";

Frontend/src/components/workspace-navigation/ProjectContextMenu/createProjectContextMenuController.ts

@@ -1,5 +1,5 @@
 import { createEffect, createSignal, onCleanup } from "solid-js";
-import type { ProjectMenuTarget } from "../data/shell.data";
+import type { ProjectMenuTarget } from "../../app-shell/data/shell.data";
 
 type ProjectContextMenuState = {
 	target: ProjectMenuTarget;
@@ -70,6 +70,15 @@ export const createProjectContextMenuController = () => {
 		setMenuState({ target, x: event.clientX, y: event.clientY });
 	};
 
+	const openMenuFromElement = (element: HTMLElement, target: ProjectMenuTarget): void => {
+		const rect = element.getBoundingClientRect();
+		setMenuState({
+			target,
+			x: rect.left + rect.width / 2,
+			y: rect.top + rect.height / 2,
+		});
+	};
+
 	createEffect(() => {
 		if (!menuState() || typeof window === "undefined") {
 			return;
@@ -112,6 +121,7 @@ export const createProjectContextMenuController = () => {
 	return {
 		menuState,
 		openMenu,
+		openMenuFromElement,
 		closeMenu,
 		setMenuRef: (element: HTMLDivElement): void => {
 			menuRef = element;

Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.data.ts

@@ -0,0 +1,144 @@
+// Path: Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.data.ts
+
+import type { JSX } from "solid-js";
+import type {
+	NavTreeAdapter,
+	NavTreeDropTarget,
+} from "../shared/navTreeDnd";
+import type { ProjectItem } from "../../app-shell/data/shell.data";
+
+export type ProjectSelectorProps = {
+	compact?: boolean;
+	isOpen: boolean;
+	onToggle: () => void;
+	onClose: () => void;
+};
+
+export type ProjectFolderNode = {
+	kind: "folder";
+	id: string;
+	path: string;
+	label: string;
+	meta?: string;
+	children: ProjectTreeNode[];
+};
+
+export type ProjectLeafNode = {
+	kind: "project";
+	item: ProjectItem;
+};
+
+export type ProjectTreeNode = ProjectFolderNode | ProjectLeafNode;
+
+export type PersistedProjectFolderRecord = {
+	id: string;
+	path: string;
+	label: string;
+	children: PersistedProjectFolderRecord[];
+};
+
+export type ProjectFoldersResponse = {
+	data?: {
+		folders?: PersistedProjectFolderRecord[];
+		renamedFolder?: PersistedProjectFolderRecord;
+		movedFolder?: PersistedProjectFolderRecord;
+		previousFolderId?: string;
+		previousFolderPath?: string;
+	};
+	error?: string;
+	message?: string;
+};
+
+export type PendingProjectFolderDraft = {
+	parentId: string | null;
+	depth: number;
+};
+
+export type PendingProjectFolderRename = {
+	folderId: string;
+	depth: number;
+};
+
+export type ProjectDragTarget = NavTreeDropTarget;
+
+export type ProjectDragState = {
+	draggedNodeId: string;
+	dropTarget: ProjectDragTarget | null;
+};
+
+export type DragGhostPosition = {
+	x: number;
+	y: number;
+};
+
+export type ProjectFolderBranchProps = {
+	nodes: readonly ProjectTreeNode[];
+	depth: number;
+	parentId: string | null;
+	selectedProjectId: string;
+	isFolderCollapsed: (folderId: string) => boolean;
+	onToggleFolder: (folderId: string) => void;
+	onSelectProject: (projectId: string) => void;
+	onOpenFolderMenu: (event: MouseEvent, folder: ProjectFolderNode) => void;
+	onOpenProjectMenu: (event: MouseEvent, item: ProjectItem) => void;
+	onNodePointerDown: (event: PointerEvent, nodeId: string) => void;
+	onNodePointerMove: (event: PointerEvent, parentId: string | null, index: number, node: ProjectTreeNode) => void;
+	pendingFolderDraft: PendingProjectFolderDraft | null;
+	pendingFolderName: string;
+	onPendingFolderNameChange: (value: string) => void;
+	onSubmitPendingFolder: () => void;
+	onCancelPendingFolder: () => void;
+	pendingFolderRename: PendingProjectFolderRename | null;
+	pendingFolderRenameName: string;
+	onPendingFolderRenameChange: (value: string) => void;
+	onSubmitPendingFolderRename: () => void;
+	onCancelPendingFolderRename: () => void;
+	dragState: ProjectDragState | null;
+	isTreeClickSuppressed: () => boolean;
+};
+
+export const LONG_PRESS_MS = 320;
+
+export const getProjectTreeNodeId = (node: ProjectTreeNode): string =>
+	node.kind === "folder" ? node.id : node.item.id;
+
+export const buildPersistedFolderNodes = (folders: readonly PersistedProjectFolderRecord[] = []): ProjectTreeNode[] =>
+	folders.map((folder) => ({
+		kind: "folder",
+		id: folder.id,
+		path: folder.path,
+		label: folder.label,
+		children: buildPersistedFolderNodes(folder.children ?? []),
+	}));
+
+export const buildProjectTree = (
+	items: readonly ProjectItem[],
+	folders: readonly PersistedProjectFolderRecord[] = [],
+): ProjectTreeNode[] => [
+	...items.map((item) => ({
+		kind: "project" as const,
+		item,
+	})),
+	...buildPersistedFolderNodes(folders),
+];
+
+export const countProjectFolderSiblingsBeforeIndex = (
+	siblings: readonly ProjectTreeNode[],
+	index: number,
+): number => siblings.slice(0, index).filter((node) => node.kind === "folder").length;
+
+export const readPersistedFolders = (body: ProjectFoldersResponse): PersistedProjectFolderRecord[] =>
+	Array.isArray(body.data?.folders) ? body.data.folders : [];
+
+export const projectTreeAdapter: NavTreeAdapter<ProjectTreeNode> = {
+	getNodeId: getProjectTreeNodeId,
+	isBranchNode: (node) => node.kind === "folder",
+	getChildren: (node) => (node.kind === "folder" ? node.children : []),
+	withChildren: (node, children) =>
+		node.kind === "folder"
+			? {
+				...node,
+				children: [...children],
+			}
+			: node,
+};

Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.hook.ts

@@ -0,0 +1,671 @@
+// Path: Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.hook.ts
+
+import { createEffect, createSignal, onCleanup, onMount } from "solid-js";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import {
+	createProjectFolderTarget,
+	createProjectSurfaceTarget,
+	createProjectTarget,
+	type ProjectItem,
+	type ProjectMenuTarget,
+} from "../../app-shell/data/shell.data";
+import {
+	collectBranchNodeIds,
+	findTreeNodeDepth,
+	findTreeNodeLocation,
+	getPointerRelativeY,
+	isUuidString,
+	moveTreeNode,
+	resolveTreeDropTarget,
+} from "../shared/navTreeDnd";
+import { createProjectContextMenuController } from "../ProjectContextMenu/createProjectContextMenuController";
+import {
+	LONG_PRESS_MS,
+	buildProjectTree,
+	countProjectFolderSiblingsBeforeIndex,
+	projectTreeAdapter,
+	readPersistedFolders,
+	type DragGhostPosition,
+	type PendingProjectFolderDraft,
+	type PendingProjectFolderRename,
+	type PersistedProjectFolderRecord,
+	type ProjectDragState,
+	type ProjectFolderNode,
+	type ProjectSelectorProps,
+	type ProjectTreeNode,
+} from "./ProjectSelector.data";
+import {
+	createProjectFolderRequest,
+	deleteProjectFolderRequest,
+	fetchProjectFolders,
+	isValidProjectFolderProjectId,
+	moveProjectFolderRequest,
+	renameProjectFolderRequest,
+} from "./projectFolders.api";
+
+export const useProjectSelector = (props: ProjectSelectorProps) => {
+	const appShellData = useAppShellData();
+	const [selectedProject, setSelectedProject] = createSignal(appShellData.activeProject());
+	const [drawerTop, setDrawerTop] = createSignal<number>(0);
+	const [collapsedFolderIds, setCollapsedFolderIds] = createSignal<readonly string[]>([]);
+	const [persistedFolders, setPersistedFolders] = createSignal<readonly PersistedProjectFolderRecord[]>([]);
+	const [projectTreeNodes, setProjectTreeNodes] = createSignal<ProjectTreeNode[]>(buildProjectTree(appShellData.projectItems(), persistedFolders()));
+	const [pendingFolderDraft, setPendingFolderDraft] = createSignal<PendingProjectFolderDraft | null>(null);
+	const [pendingFolderName, setPendingFolderName] = createSignal("");
+	const [pendingFolderRename, setPendingFolderRename] = createSignal<PendingProjectFolderRename | null>(null);
+	const [pendingFolderRenameName, setPendingFolderRenameName] = createSignal("");
+	const [dragState, setDragState] = createSignal<ProjectDragState | null>(null);
+	const [dragGhostPosition, setDragGhostPosition] = createSignal<DragGhostPosition>({ x: 0, y: 0 });
+	const [suppressNextTreeClick, setSuppressNextTreeClick] = createSignal(false);
+	let rootRef: HTMLDivElement | undefined;
+	let triggerRef: HTMLButtonElement | undefined;
+	let contextMenuRef: HTMLDivElement | undefined;
+	let longPressTimer: number | undefined;
+	let suppressClickTimer: number | undefined;
+	let lastSelectedProjectId: string | null = null;
+	let latestPersistedFoldersRequest = 0;
+	const contextMenu = createProjectContextMenuController();
+
+	const setRootRef = (element: HTMLDivElement | undefined): void => {
+		rootRef = element;
+	};
+
+	const setTriggerRef = (element: HTMLButtonElement | undefined): void => {
+		triggerRef = element;
+	};
+
+	const setContextMenuElement = (element: HTMLDivElement | undefined): void => {
+		contextMenuRef = element;
+		if (element) {
+			contextMenu.setMenuRef(element);
+		}
+	};
+
+	const clearLongPressTimer = (): void => {
+		if (longPressTimer !== undefined) {
+			window.clearTimeout(longPressTimer);
+			longPressTimer = undefined;
+		}
+	};
+
+	const updateDragGhostPosition = (x: number, y: number): void => {
+		setDragGhostPosition({ x: x + 18, y: y + 18 });
+	};
+
+	const draggedNode = (): ProjectTreeNode | null => {
+		const currentDragState = dragState();
+		if (!currentDragState) {
+			return null;
+		}
+
+		return findTreeNodeLocation(projectTreeNodes(), currentDragState.draggedNodeId, projectTreeAdapter)?.node ?? null;
+	};
+
+	const draggedNodeMeta = (): string => {
+		const node = draggedNode();
+		if (!node) {
+			return "";
+		}
+
+		return node.kind === "folder" ? "Folder" : "Project";
+	};
+
+	const suppressTreeClickTemporarily = (): void => {
+		setSuppressNextTreeClick(true);
+
+		if (suppressClickTimer !== undefined) {
+			window.clearTimeout(suppressClickTimer);
+		}
+
+		suppressClickTimer = window.setTimeout(() => {
+			setSuppressNextTreeClick(false);
+			suppressClickTimer = undefined;
+		}, 80);
+	};
+
+	const isFolderCollapsed = (folderId: string): boolean => collapsedFolderIds().includes(folderId);
+
+	const toggleFolder = (folderId: string): void => {
+		setCollapsedFolderIds((current) => (current.includes(folderId) ? current.filter((id) => id !== folderId) : [...current, folderId]));
+	};
+
+	const syncProjectTree = (): void => {
+		const nextTree = buildProjectTree(appShellData.projectItems(), persistedFolders());
+		const availableFolderIds = new Set(collectBranchNodeIds(nextTree, projectTreeAdapter));
+
+		setProjectTreeNodes(nextTree);
+		setCollapsedFolderIds((current) => current.filter((folderId) => availableFolderIds.has(folderId)));
+	};
+
+	const resetProjectTreeInteractionState = (): void => {
+		setCollapsedFolderIds([]);
+		setPendingFolderDraft(null);
+		setPendingFolderName("");
+		setPendingFolderRename(null);
+		setPendingFolderRenameName("");
+		setDragState(null);
+	};
+
+	const folderIds = (): string[] => collectBranchNodeIds(projectTreeNodes(), projectTreeAdapter);
+
+	const expandAllFolders = (): void => {
+		setCollapsedFolderIds([]);
+	};
+
+	const collapseAllFolders = (): void => {
+		setCollapsedFolderIds(folderIds());
+	};
+
+	const totalFolderCount = (): number => folderIds().length;
+
+	const areAllFoldersCollapsed = (): boolean => {
+		const folderCount = totalFolderCount();
+		return folderCount > 0 && collapsedFolderIds().length >= folderCount;
+	};
+
+	const toggleAllFolders = (): void => {
+		if (areAllFoldersCollapsed()) {
+			expandAllFolders();
+			return;
+		}
+
+		collapseAllFolders();
+	};
+
+	const loadPersistedFolders = async (projectId: string): Promise<void> => {
+		const requestId = latestPersistedFoldersRequest + 1;
+		latestPersistedFoldersRequest = requestId;
+
+		if (!isValidProjectFolderProjectId(projectId) || !isUuidString(projectId)) {
+			setPersistedFolders([]);
+			return;
+		}
+
+		try {
+			const body = await fetchProjectFolders(projectId);
+
+			if (requestId !== latestPersistedFoldersRequest) {
+				return;
+			}
+
+			setPersistedFolders(readPersistedFolders(body));
+		} catch (error) {
+			if (requestId !== latestPersistedFoldersRequest) {
+				return;
+			}
+
+			console.error(error);
+			setPersistedFolders([]);
+		}
+	};
+
+	createEffect(() => {
+		setSelectedProject(appShellData.activeProject());
+	});
+
+	createEffect(() => {
+		syncProjectTree();
+	});
+
+	createEffect(() => {
+		const projectId = selectedProject().id;
+
+		if (lastSelectedProjectId === null) {
+			lastSelectedProjectId = projectId;
+			return;
+		}
+
+		if (projectId === lastSelectedProjectId) {
+			return;
+		}
+
+		lastSelectedProjectId = projectId;
+		resetProjectTreeInteractionState();
+	});
+
+	createEffect(() => {
+		void loadPersistedFolders(selectedProject().id);
+	});
+
+	onMount(() => {
+		if (triggerRef) {
+			const updateDrawerTop = (): void => {
+				if (!triggerRef) {
+					return;
+				}
+
+				setDrawerTop(triggerRef.offsetTop + triggerRef.offsetHeight + 8);
+			};
+
+			updateDrawerTop();
+
+			const observer = new ResizeObserver(() => {
+				updateDrawerTop();
+			});
+
+			observer.observe(triggerRef);
+			window.addEventListener("resize", updateDrawerTop);
+
+			onCleanup(() => {
+				observer.disconnect();
+				window.removeEventListener("resize", updateDrawerTop);
+			});
+		}
+
+		const handlePointerDown = (event: PointerEvent): void => {
+			if (!props.isOpen || !rootRef) {
+				return;
+			}
+
+			const target = event.target;
+
+			if (target instanceof Node && rootRef.contains(target)) {
+				return;
+			}
+
+			if (target instanceof Node && contextMenuRef?.contains(target)) {
+				return;
+			}
+
+			props.onClose();
+		};
+
+		const handlePointerUp = (): void => {
+			clearLongPressTimer();
+
+			const nextDragState = dragState();
+
+			if (!nextDragState?.dropTarget) {
+				if (nextDragState) {
+					suppressTreeClickTemporarily();
+				}
+				setDragState(null);
+				return;
+			}
+
+			suppressTreeClickTemporarily();
+
+			const currentNodes = projectTreeNodes();
+			const draggedLocation = findTreeNodeLocation(currentNodes, nextDragState.draggedNodeId, projectTreeAdapter);
+			const canPersistMove = isUuidString(selectedProject().id);
+			const draggedFolderPath = draggedLocation?.node.kind === "folder" ? draggedLocation.node.path : null;
+			const previewNodes = moveTreeNode(currentNodes, nextDragState.draggedNodeId, nextDragState.dropTarget, projectTreeAdapter);
+			const previewLocation = findTreeNodeLocation(previewNodes, nextDragState.draggedNodeId, projectTreeAdapter);
+			const persistedParentLocation = previewLocation?.parentId ? findTreeNodeLocation(previewNodes, previewLocation.parentId, projectTreeAdapter) : null;
+			const persistedParentFolderPath = persistedParentLocation?.node.kind === "folder" ? persistedParentLocation.node.path : null;
+			const previewSiblings = previewLocation?.parentId ? persistedParentLocation?.node.kind === "folder" ? persistedParentLocation.node.children : [] : previewNodes;
+			const targetIndex = previewLocation ? countProjectFolderSiblingsBeforeIndex(previewSiblings, previewLocation.index) : 0;
+
+			if (canPersistMove && draggedLocation?.node.kind === "folder" && draggedFolderPath && (!previewLocation?.parentId || persistedParentLocation?.node.kind === "folder")) {
+				void movePersistedFolder(
+					draggedFolderPath,
+					persistedParentFolderPath,
+					draggedLocation.node.id,
+					persistedParentLocation?.node.kind === "folder" ? persistedParentLocation.node.id : null,
+					targetIndex,
+				);
+			} else {
+				setProjectTreeNodes((current) => moveTreeNode(current, nextDragState.draggedNodeId, nextDragState.dropTarget!, projectTreeAdapter));
+			}
+
+			setDragState(null);
+		};
+
+		const handleEscape = (event: KeyboardEvent): void => {
+			if (event.key !== "Escape") {
+				return;
+			}
+
+			clearLongPressTimer();
+
+			if (dragState()) {
+				setDragState(null);
+				return;
+			}
+
+			if (!props.isOpen) {
+				return;
+			}
+
+			props.onClose();
+			triggerRef?.focus();
+		};
+
+		const handlePointerMove = (event: PointerEvent): void => {
+			if (!dragState()) {
+				return;
+			}
+
+			updateDragGhostPosition(event.clientX, event.clientY);
+		};
+
+		document.addEventListener("pointerdown", handlePointerDown);
+		window.addEventListener("pointerup", handlePointerUp);
+		window.addEventListener("pointercancel", handlePointerUp);
+		window.addEventListener("pointermove", handlePointerMove);
+		window.addEventListener("keydown", handleEscape);
+
+		onCleanup(() => {
+			clearLongPressTimer();
+			if (suppressClickTimer !== undefined) {
+				window.clearTimeout(suppressClickTimer);
+			}
+			document.removeEventListener("pointerdown", handlePointerDown);
+			window.removeEventListener("pointerup", handlePointerUp);
+			window.removeEventListener("pointercancel", handlePointerUp);
+			window.removeEventListener("pointermove", handlePointerMove);
+			window.removeEventListener("keydown", handleEscape);
+		});
+	});
+
+	const toggleOpen = (): void => {
+		if (!props.isOpen) {
+			props.onToggle();
+			return;
+		}
+
+		props.onClose();
+	};
+
+	const selectProject = (projectId: string): void => {
+		const location = findTreeNodeLocation(projectTreeNodes(), projectId, projectTreeAdapter);
+
+		if (!location || location.node.kind !== "project") {
+			return;
+		}
+
+		setSelectedProject({ id: location.node.item.id, name: location.node.item.name });
+		props.onClose();
+	};
+
+	const beginFolderDraft = (parentId: string | null, depth: number): void => {
+		if (parentId) {
+			setCollapsedFolderIds((current) => current.filter((id) => id !== parentId));
+		}
+
+		setPendingFolderRename(null);
+		setPendingFolderRenameName("");
+		setPendingFolderName("");
+		setPendingFolderDraft({ parentId, depth });
+	};
+
+	const beginFolderRename = (folderId: string, label: string, depth: number): void => {
+		setPendingFolderDraft(null);
+		setPendingFolderName("");
+		setPendingFolderRename({ folderId, depth });
+		setPendingFolderRenameName(label);
+	};
+
+	const resolveFolderPath = (folderId: string): string | null => {
+		const location = findTreeNodeLocation(projectTreeNodes(), folderId, projectTreeAdapter);
+		return location && location.node.kind === "folder" ? location.node.path : null;
+	};
+
+	const submitPendingFolder = async (): Promise<void> => {
+		const name = pendingFolderName().trim();
+		const draft = pendingFolderDraft();
+		const projectId = selectedProject().id;
+
+		if (!draft) {
+			return;
+		}
+
+		if (!name) {
+			setPendingFolderDraft(null);
+			setPendingFolderName("");
+			return;
+		}
+
+		if (!isUuidString(projectId)) {
+			cancelPendingFolder();
+			return;
+		}
+
+		const parentFolderPath = draft.parentId ? resolveFolderPath(draft.parentId) : null;
+		if (draft.parentId && !parentFolderPath) {
+			cancelPendingFolder();
+			return;
+		}
+
+		try {
+			const body = await createProjectFolderRequest(projectId, name, parentFolderPath);
+
+			setPersistedFolders(readPersistedFolders(body));
+			setPendingFolderDraft(null);
+			setPendingFolderName("");
+		} catch (error) {
+			console.error(error);
+		}
+	};
+
+	const deletePersistedFolder = async (folderId: string): Promise<void> => {
+		const projectId = selectedProject().id;
+		if (!folderId || !isUuidString(projectId)) {
+			return;
+		}
+
+		const folderPath = resolveFolderPath(folderId);
+		if (!folderPath) {
+			return;
+		}
+
+		try {
+			const body = await deleteProjectFolderRequest(projectId, folderPath);
+
+			setPersistedFolders(readPersistedFolders(body));
+			setCollapsedFolderIds((current) => current.filter((id) => id !== folderId));
+		} catch (error) {
+			console.error(error);
+		}
+	};
+
+	const movePersistedFolder = async (
+		folderPath: string,
+		parentFolderPath: string | null,
+		folderStableId: string,
+		parentStableId: string | null,
+		targetIndex: number,
+	): Promise<void> => {
+		const projectId = selectedProject().id;
+		if (!folderPath || !folderStableId || !isUuidString(projectId)) {
+			return;
+		}
+
+		try {
+			const body = await moveProjectFolderRequest(projectId, {
+				folderId: folderPath,
+				folderNodeId: folderStableId,
+				parentFolderId: parentFolderPath,
+				parentNodeId: parentStableId,
+				targetIndex,
+			});
+
+			setPersistedFolders(readPersistedFolders(body));
+		} catch (error) {
+			console.error(error);
+		}
+	};
+
+	const submitPendingFolderRename = async (): Promise<void> => {
+		const draft = pendingFolderRename();
+		const name = pendingFolderRenameName().trim();
+		const projectId = selectedProject().id;
+
+		if (!draft) {
+			return;
+		}
+
+		if (!name) {
+			setPendingFolderRename(null);
+			setPendingFolderRenameName("");
+			return;
+		}
+
+		if (!isUuidString(projectId)) {
+			cancelPendingFolderRename();
+			return;
+		}
+
+		const folderPath = resolveFolderPath(draft.folderId);
+		if (!folderPath) {
+			cancelPendingFolderRename();
+			return;
+		}
+
+		try {
+			const body = await renameProjectFolderRequest(projectId, folderPath, name);
+
+			setPersistedFolders(readPersistedFolders(body));
+			setPendingFolderRename(null);
+			setPendingFolderRenameName("");
+		} catch (error) {
+			console.error(error);
+		}
+	};
+
+	const cancelPendingFolder = (): void => {
+		setPendingFolderDraft(null);
+		setPendingFolderName("");
+	};
+
+	const cancelPendingFolderRename = (): void => {
+		setPendingFolderRename(null);
+		setPendingFolderRenameName("");
+	};
+
+	const handleContextActionSelect = (action: { id: string; label: string }, target: ProjectMenuTarget): void => {
+		switch (action.id) {
+			case "new-folder":
+				switch (target.kind) {
+					case "surface":
+						beginFolderDraft(null, 0);
+						return;
+					case "folder":
+						beginFolderDraft(target.id, (findTreeNodeDepth(projectTreeNodes(), target.id, projectTreeAdapter) ?? 0) + 1);
+						return;
+					case "project": {
+						const parentId = findTreeNodeLocation(projectTreeNodes(), target.id, projectTreeAdapter)?.parentId ?? null;
+						beginFolderDraft(parentId, parentId ? (findTreeNodeDepth(projectTreeNodes(), parentId, projectTreeAdapter) ?? 0) + 1 : 0);
+						return;
+					}
+				}
+				return;
+			case "delete-folder":
+				if (target.kind === "folder") {
+					void deletePersistedFolder(target.id);
+				}
+				return;
+			case "rename-folder":
+				if (target.kind === "folder") {
+					beginFolderRename(target.id, target.label, findTreeNodeDepth(projectTreeNodes(), target.id, projectTreeAdapter) ?? 0);
+				}
+				return;
+			default:
+				return;
+		}
+	};
+
+	const handleSurfaceContextMenu = (event: MouseEvent): void => {
+		event.stopPropagation();
+		contextMenu.openMenu(event, createProjectSurfaceTarget("Projects"));
+	};
+
+	const openRootCreateMenu = (element: HTMLElement): void => {
+		contextMenu.openMenuFromElement(element, createProjectSurfaceTarget("Projects"));
+	};
+
+	const treeControlLabel = (): string => (areAllFoldersCollapsed() ? "Expand all folders" : "Collapse all folders");
+
+	const handleNodePointerDown = (event: PointerEvent, nodeId: string): void => {
+		if (event.button !== 0 || pendingFolderDraft()) {
+			return;
+		}
+
+		updateDragGhostPosition(event.clientX, event.clientY);
+		clearLongPressTimer();
+		longPressTimer = window.setTimeout(() => {
+			suppressTreeClickTemporarily();
+			setDragState({ draggedNodeId: nodeId, dropTarget: null });
+		}, LONG_PRESS_MS);
+	};
+
+	const handleNodePointerMove = (event: PointerEvent, parentId: string | null, index: number, node: ProjectTreeNode): void => {
+		const nextDragState = dragState();
+
+		if (!nextDragState || nextDragState.draggedNodeId === (node.kind === "folder" ? node.id : node.item.id)) {
+			return;
+		}
+
+		const relativeY = getPointerRelativeY(event);
+		if (relativeY === null) {
+			return;
+		}
+
+		setDragState({
+			...nextDragState,
+			dropTarget: resolveTreeDropTarget({
+				parentId,
+				index,
+				node,
+				relativeY,
+				adapter: projectTreeAdapter,
+			}),
+		});
+	};
+
+	const openFolderMenu = (event: MouseEvent, folder: ProjectFolderNode): void => {
+		event.stopPropagation();
+		contextMenu.openMenu(event, createProjectFolderTarget(folder.id, folder.label));
+	};
+
+	const openProjectMenu = (event: MouseEvent, item: ProjectItem): void => {
+		event.stopPropagation();
+		contextMenu.openMenu(event, createProjectTarget(item));
+	};
+
+	const contextMenuPosition = () => {
+		const state = contextMenu.menuState();
+		return state ? { x: state.x, y: state.y } : null;
+	};
+
+	return {
+		selectedProject,
+		drawerTop,
+		setRootRef,
+		setTriggerRef,
+		setContextMenuElement,
+		toggleOpen,
+		handleSurfaceContextMenu,
+		openRootCreateMenu,
+		treeControlLabel,
+		toggleAllFolders,
+		totalFolderCount,
+		areAllFoldersCollapsed,
+		projectTreeNodes,
+		isFolderCollapsed,
+		toggleFolder,
+		selectProject,
+		openFolderMenu,
+		openProjectMenu,
+		handleNodePointerDown,
+		handleNodePointerMove,
+		pendingFolderDraft,
+		pendingFolderName,
+		setPendingFolderName,
+		submitPendingFolder,
+		cancelPendingFolder,
+		pendingFolderRename,
+		pendingFolderRenameName,
+		setPendingFolderRenameName,
+		submitPendingFolderRename,
+		cancelPendingFolderRename,
+		dragState,
+		suppressNextTreeClick,
+		contextMenu,
+		contextMenuPosition,
+		handleContextActionSelect,
+		draggedNode,
+		dragGhostPosition,
+		draggedNodeMeta,
+	};
+};

Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.module.scss

@@ -1,3 +1,5 @@
+@use "../shared/tree-nav" as treeNav;
+
 .root {
   display: grid;
   --project-drawer-gap: var(--space-3);
@@ -191,142 +193,146 @@
 }
 
 .treeSectionLabel {
-  @include text-caption;
-  margin: 0 0 var(--space-2);
+	@include treeNav.section-label;
+  margin: 0;
   padding: 0 var(--space-3);
-  color: var(--color-text-subtle);
-  text-transform: uppercase;
-  letter-spacing: 0.04em;
 }
 
-.treeList {
-  list-style: none;
-  display: grid;
-  gap: var(--space-1);
-  padding: 0;
-}
-
-.treeEmptySlot {
-	min-height: calc(var(--control-size-lg) - var(--space-2));
-	padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
-	border-radius: var(--radius-lg);
-	border: 1px dashed color-mix(in srgb, var(--color-border) 38%, transparent);
-	opacity: 0.35;
-}
-
-.treeInputRow {
-	width: 100%;
-	min-width: 0;
-	display: grid;
-	grid-template-columns: auto minmax(0, 1fr);
+.treeSectionHeader {
+	display: flex;
 	align-items: center;
+	justify-content: space-between;
 	gap: var(--space-2);
-	min-height: calc(var(--control-size-lg) - var(--space-2));
-	padding: var(--space-2) var(--space-3);
-	padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
-	border: 1px solid color-mix(in srgb, var(--color-border) 42%, transparent);
-	border-radius: var(--radius-lg);
-	background: color-mix(in srgb, var(--color-surface) 94%, transparent);
+	margin-bottom: var(--space-2);
+	padding-right: var(--space-1);
 }
 
-.treeInput {
-	width: 100%;
-	min-width: 0;
-	border: 0;
-	background: transparent;
+.treeControls {
+	display: inline-flex;
+	align-items: center;
+	gap: var(--space-1);
+	flex-wrap: wrap;
+	justify-content: flex-end;
+}
+
+.treeControlButton {
+	display: inline-flex;
+	align-items: center;
+	justify-content: center;
+	width: calc(var(--control-size-md) - var(--space-1));
+	height: calc(var(--control-size-md) - var(--space-1));
+	@include text-caption;
+	padding: 0;
+	border: 1px solid color-mix(in srgb, var(--color-border) 46%, transparent);
+	border-radius: var(--radius-pill);
+	background: color-mix(in srgb, var(--color-surface) 95%, transparent);
+	color: var(--color-text-muted);
+	transition:
+		border-color 160ms var(--easing-standard),
+		background 160ms var(--easing-standard),
+		color 160ms var(--easing-standard);
+}
+
+.treeControlButton:hover,
+.treeControlButton:focus-visible {
+	border-color: color-mix(in srgb, var(--color-border-strong) 56%, transparent);
+	background: var(--color-surface-hover);
 	color: var(--color-text);
-	font: inherit;
 	outline: none;
 }
 
-.treeInput::placeholder {
-	color: var(--color-text-muted);
+.treeControlButton:disabled {
+	opacity: 0.45;
+	cursor: default;
+}
+
+.treeList {
+	@include treeNav.tree-list;
+}
+
+.treeEmptySlot {
+	@include treeNav.empty-slot;
+}
+
+.treeInputRow {
+	@include treeNav.input-row;
+}
+
+.treeInput {
+	@include treeNav.input;
 }
 
 .treeItem {
-  width: 100%;
-  min-width: 0;
-  display: grid;
-  grid-template-columns: auto auto minmax(0, 1fr) auto;
-  align-items: center;
-  gap: var(--space-2);
-  min-height: calc(var(--control-size-lg) - var(--space-2));
-  padding: var(--space-2) var(--space-3);
-  padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
-  border: 1px solid transparent;
-  border-radius: var(--radius-lg);
-  background: transparent;
-  color: var(--color-text-muted);
-  transition:
-    background 160ms var(--easing-standard),
-    color 160ms var(--easing-standard),
-    border-color 160ms var(--easing-standard),
-    box-shadow 160ms var(--easing-standard),
-    transform 180ms var(--easing-standard);
-  text-align: left;
+	@include treeNav.item;
 }
 
 .treeItem:hover,
 .treeItem:focus-visible {
-  background: color-mix(in srgb, var(--color-surface-hover) 80%, var(--color-accent-soft) 20%);
-  color: var(--color-text);
-  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
+	@include treeNav.item-hover;
 }
 
 .treeItemFolder {
-  color: var(--color-text);
+	@include treeNav.item-folder;
 }
 
 .treeItemDragging {
-	opacity: 0.45;
-	transform: scale(0.985);
-	box-shadow: none;
+	@include treeNav.item-dragging;
 }
 
 .treeItemDropBefore {
-	box-shadow: inset 0 2px 0 color-mix(in srgb, var(--color-accent-strong) 78%, transparent);
+	@include treeNav.item-drop-before;
 }
 
 .treeItemDropAfter {
-	box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--color-accent-strong) 78%, transparent);
+	@include treeNav.item-drop-after;
 }
 
 .treeItemDropInside {
-	border-color: color-mix(in srgb, var(--color-accent-strong) 55%, transparent);
-	background: color-mix(in srgb, var(--color-accent-soft) 36%, var(--color-surface));
-	color: var(--color-text);
-	box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
+	@include treeNav.item-drop-inside;
 }
 
 .folderChevron {
-  color: var(--color-text-muted);
-  transition: transform 160ms var(--easing-standard);
+	@include treeNav.folder-chevron;
 }
 
 .folderChevronOpen {
-  transform: rotate(90deg);
+	@include treeNav.folder-chevron-open;
 }
 
 .treeItemActive {
-  border-color: var(--color-border);
-  background: var(--color-surface);
-  color: var(--color-text);
-  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
+	@include treeNav.item-active;
 }
 
 .icon {
-  color: inherit;
-  opacity: 0.85;
+	@include treeNav.icon;
 }
 
 .label {
-  @include text-label;
-  min-width: 0;
+	@include treeNav.label;
 }
 
 .itemMeta {
-  @include text-caption;
-  color: var(--color-text-muted);
+	@include treeNav.item-meta;
+}
+
+.dragGhostLayer {
+	@include treeNav.drag-ghost-layer;
+}
+
+.dragGhost {
+	@include treeNav.drag-ghost;
+}
+
+.dragGhostCopy {
+	@include treeNav.drag-ghost-copy;
+}
+
+.dragGhostTitle {
+	@include treeNav.drag-ghost-title;
+}
+
+.dragGhostMeta {
+	@include treeNav.drag-ghost-meta;
 }
 
 @media (max-width: 720px) {

Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.parts.tsx

@@ -0,0 +1,213 @@
+// Path: Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.parts.tsx
+
+import { For, Show, type JSX } from "solid-js";
+import { ChevronRight, Folder, LayoutGrid } from "../../../lib/icons";
+import type { ProjectItem } from "../../app-shell/data/shell.data";
+import {
+	getProjectTreeNodeId,
+	type PendingProjectFolderDraft,
+	type PendingProjectFolderRename,
+	type ProjectDragState,
+	type ProjectFolderBranchProps,
+	type ProjectFolderNode,
+	type ProjectTreeNode,
+} from "./ProjectSelector.data";
+import styles from "./ProjectSelector.module.scss";
+
+export const ProjectFolderDraftRow = (props: {
+	depth: number;
+	value: string;
+	onInput: (value: string) => void;
+	onSubmit: () => void;
+	onCancel: () => void;
+}): JSX.Element => {
+	let inputRef: HTMLInputElement | undefined;
+
+	queueMicrotask(() => inputRef?.focus());
+
+	return (
+		<li>
+			<div class={styles.treeInputRow} style={{ "--tree-depth": String(props.depth) }}>
+				<Folder class={styles.icon} size={18} strokeWidth={2} />
+				<input
+					ref={inputRef}
+					type="text"
+					class={styles.treeInput}
+					value={props.value}
+					placeholder="Folder name"
+					onInput={(event): void => props.onInput(event.currentTarget.value)}
+					onBlur={props.onSubmit}
+					onKeyDown={(event): void => {
+						if (event.key === "Enter") {
+							event.preventDefault();
+							event.currentTarget.blur();
+							return;
+						}
+
+						if (event.key === "Escape") {
+							event.preventDefault();
+							props.onCancel();
+							event.currentTarget.blur();
+						}
+					}}
+				/>
+			</div>
+		</li>
+	);
+};
+
+export const ProjectFolderBranch = (props: ProjectFolderBranchProps): JSX.Element => (
+	<ul class={styles.treeList} role="list">
+		<Show when={props.nodes.length === 0 && props.pendingFolderDraft?.parentId !== props.parentId}>
+			<li>
+				<div class={styles.treeEmptySlot} style={{ "--tree-depth": String(props.depth) }} />
+			</li>
+		</Show>
+
+		<For each={props.nodes}>
+			{(node, indexAccessor): JSX.Element => {
+				const nodeId = (): string => getProjectTreeNodeId(node);
+				const isDraggedNode = (): boolean => props.dragState?.draggedNodeId === nodeId();
+				const dropIntent = (): "before" | "after" | "inside" | null => {
+					if (props.dragState?.dropTarget?.targetNodeId !== nodeId()) {
+						return null;
+					}
+
+					return props.dragState.dropTarget.intent;
+				};
+
+				if (node.kind === "folder") {
+					const isCollapsed = (): boolean => props.isFolderCollapsed(node.id);
+					const isRenaming = (): boolean => props.pendingFolderRename?.folderId === node.id;
+
+					return (
+						<li>
+							<Show
+								when={isRenaming()}
+								fallback={
+									<button
+										type="button"
+										classList={{
+											[styles.treeItem]: true,
+											[styles.treeItemFolder]: true,
+											[styles.treeItemDragging]: isDraggedNode(),
+											[styles.treeItemDropBefore]: dropIntent() === "before",
+											[styles.treeItemDropAfter]: dropIntent() === "after",
+											[styles.treeItemDropInside]: dropIntent() === "inside",
+										}}
+										style={{ "--tree-depth": String(props.depth) }}
+										aria-expanded={!isCollapsed()}
+										onClick={() => {
+											if (props.dragState || props.isTreeClickSuppressed()) {
+												return;
+											}
+
+											props.onToggleFolder(node.id);
+										}}
+										onContextMenu={(event): void => props.onOpenFolderMenu(event, node)}
+										onPointerDown={(event): void => props.onNodePointerDown(event, node.id)}
+										onPointerMove={(event): void => props.onNodePointerMove(event, props.parentId, indexAccessor(), node)}
+										onPointerEnter={(event): void => props.onNodePointerMove(event, props.parentId, indexAccessor(), node)}
+									>
+										<ChevronRight
+											classList={{
+												[styles.folderChevron]: true,
+												[styles.folderChevronOpen]: !isCollapsed(),
+											}}
+											size={16}
+											strokeWidth={2}
+										/>
+										<Folder class={styles.icon} size={18} strokeWidth={2} />
+										<span class={styles.label}>{node.label}</span>
+										<Show when={node.meta}>
+											<span class={styles.itemMeta}>{node.meta}</span>
+										</Show>
+									</button>
+								}
+							>
+								<ProjectFolderDraftRow
+									depth={props.pendingFolderRename?.depth ?? props.depth}
+									value={props.pendingFolderRenameName}
+									onInput={props.onPendingFolderRenameChange}
+									onSubmit={props.onSubmitPendingFolderRename}
+									onCancel={props.onCancelPendingFolderRename}
+								/>
+							</Show>
+
+							<Show when={!isCollapsed() && ((node.children?.length ?? 0) > 0 || props.pendingFolderDraft?.parentId === node.id)}>
+								<ProjectFolderBranch
+									nodes={node.children}
+									depth={props.depth + 1}
+									parentId={node.id}
+									selectedProjectId={props.selectedProjectId}
+									isFolderCollapsed={props.isFolderCollapsed}
+									onToggleFolder={props.onToggleFolder}
+									onSelectProject={props.onSelectProject}
+									onOpenFolderMenu={props.onOpenFolderMenu}
+									onOpenProjectMenu={props.onOpenProjectMenu}
+									onNodePointerDown={props.onNodePointerDown}
+									onNodePointerMove={props.onNodePointerMove}
+									pendingFolderDraft={props.pendingFolderDraft}
+									pendingFolderName={props.pendingFolderName}
+									onPendingFolderNameChange={props.onPendingFolderNameChange}
+									onSubmitPendingFolder={props.onSubmitPendingFolder}
+									onCancelPendingFolder={props.onCancelPendingFolder}
+									pendingFolderRename={props.pendingFolderRename}
+									pendingFolderRenameName={props.pendingFolderRenameName}
+									onPendingFolderRenameChange={props.onPendingFolderRenameChange}
+									onSubmitPendingFolderRename={props.onSubmitPendingFolderRename}
+									onCancelPendingFolderRename={props.onCancelPendingFolderRename}
+									dragState={props.dragState}
+									isTreeClickSuppressed={props.isTreeClickSuppressed}
+								/>
+							</Show>
+						</li>
+					);
+				}
+
+				return (
+					<li>
+						<button
+							type="button"
+							classList={{
+								[styles.treeItem]: true,
+								[styles.treeItemActive]: props.selectedProjectId === node.item.id,
+								[styles.treeItemDragging]: isDraggedNode(),
+								[styles.treeItemDropBefore]: dropIntent() === "before",
+								[styles.treeItemDropAfter]: dropIntent() === "after",
+							}}
+							style={{ "--tree-depth": String(props.depth) }}
+							onClick={(): void => {
+								if (props.dragState || props.isTreeClickSuppressed()) {
+									return;
+								}
+
+								props.onSelectProject(node.item.id);
+							}}
+							onContextMenu={(event): void => props.onOpenProjectMenu(event, node.item)}
+							onPointerDown={(event): void => props.onNodePointerDown(event, node.item.id)}
+							onPointerMove={(event): void => props.onNodePointerMove(event, props.parentId, indexAccessor(), node)}
+							onPointerEnter={(event): void => props.onNodePointerMove(event, props.parentId, indexAccessor(), node)}
+						>
+							<LayoutGrid class={styles.icon} size={18} strokeWidth={2} />
+							<span class={styles.label}>{node.item.name}</span>
+							<Show when={node.item.meta}>
+								<span class={styles.itemMeta}>{node.item.meta}</span>
+							</Show>
+						</button>
+					</li>
+				);
+			}}
+		</For>
+
+		<Show when={props.pendingFolderDraft?.parentId === props.parentId}>
+			<ProjectFolderDraftRow
+				depth={props.pendingFolderDraft?.depth ?? props.depth}
+				value={props.pendingFolderName}
+				onInput={props.onPendingFolderNameChange}
+				onSubmit={props.onSubmitPendingFolder}
+				onCancel={props.onCancelPendingFolder}
+			/>
+		</Show>
+	</ul>
+);

Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.tsx

@@ -0,0 +1,222 @@
+// Path: Frontend/src/components/workspace-navigation/ProjectSelector/ProjectSelector.tsx
+
+import { Show, type JSX } from "solid-js";
+import { Portal } from "solid-js/web";
+import { ChevronDown, ChevronRight, Folder, LayoutGrid, ListCollapse, Plus, UnfoldVertical } from "../../../lib/icons";
+import { ProjectContextMenu } from "../ProjectContextMenu/ProjectContextMenu";
+import { useProjectSelector } from "./ProjectSelector.hook";
+import { ProjectFolderBranch } from "./ProjectSelector.parts";
+import { type ProjectSelectorProps } from "./ProjectSelector.data";
+import styles from "./ProjectSelector.module.scss";
+
+export const ProjectSelector = (props: ProjectSelectorProps): JSX.Element => {
+	const {
+		selectedProject,
+		drawerTop,
+		setRootRef,
+		setTriggerRef,
+		setContextMenuElement,
+		toggleOpen,
+		handleSurfaceContextMenu,
+		openRootCreateMenu,
+		treeControlLabel,
+		toggleAllFolders,
+		totalFolderCount,
+		areAllFoldersCollapsed,
+		projectTreeNodes,
+		isFolderCollapsed,
+		toggleFolder,
+		selectProject,
+		openFolderMenu,
+		openProjectMenu,
+		handleNodePointerDown,
+		handleNodePointerMove,
+		pendingFolderDraft,
+		pendingFolderName,
+		setPendingFolderName,
+		submitPendingFolder,
+		cancelPendingFolder,
+		pendingFolderRename,
+		pendingFolderRenameName,
+		setPendingFolderRenameName,
+		submitPendingFolderRename,
+		cancelPendingFolderRename,
+		dragState,
+		suppressNextTreeClick,
+		contextMenu,
+		contextMenuPosition,
+		handleContextActionSelect,
+		draggedNode,
+		dragGhostPosition,
+		draggedNodeMeta,
+	} = useProjectSelector(props);
+
+	return (
+		<div
+			ref={setRootRef}
+			classList={{
+				[styles.root]: true,
+				[styles.rootCompact]: !!props.compact,
+				[styles.rootDragMode]: !!dragState(),
+			}}
+			style={{
+				"--project-drawer-top": `${drawerTop()}px`,
+			}}
+		>
+			<button
+				type="button"
+				ref={setTriggerRef}
+				classList={{
+					[styles.trigger]: true,
+					[styles.triggerCompact]: !!props.compact,
+					[styles.triggerOpen]: props.isOpen,
+				}}
+				aria-label={`Open project menu for ${selectedProject().name}`}
+				aria-expanded={props.isOpen}
+				aria-haspopup="menu"
+				title={selectedProject().name}
+				onClick={toggleOpen}
+			>
+				<span class={styles.triggerLead} aria-hidden="true">
+					<Folder size={18} strokeWidth={2} />
+				</span>
+				{!props.compact ? (
+					<span class={styles.triggerCopy}>
+						<span class={styles.eyebrow}>Projects</span>
+						<span class={styles.value}>{selectedProject().name}</span>
+					</span>
+				) : null}
+				<ChevronDown
+					classList={{
+						[styles.triggerIcon]: true,
+						[styles.triggerIconOpen]: props.isOpen,
+					}}
+					size={16}
+					strokeWidth={2}
+				/>
+			</button>
+
+			<Show when={props.isOpen}>
+				<>
+					<button
+						type="button"
+						classList={{
+							[styles.scrim]: true,
+							[styles.scrimOpen]: props.isOpen,
+						}}
+						aria-hidden={!props.isOpen}
+						tabIndex={props.isOpen ? 0 : -1}
+						onClick={props.onClose}
+					/>
+
+					<div
+						classList={{
+							[styles.drawer]: true,
+							[styles.drawerOpen]: props.isOpen,
+						}}
+						aria-hidden={!props.isOpen}
+						onContextMenu={handleSurfaceContextMenu}
+					>
+						<div class={styles.drawerBody}>
+							<div class={styles.treeSectionHeader}>
+								<Show when={!props.compact}>
+									<div class={styles.treeSectionLabel}>Projects</div>
+								</Show>
+
+								<div class={styles.treeControls}>
+									<button
+										type="button"
+										class={styles.treeControlButton}
+										onClick={(event): void => {
+											event.stopPropagation();
+											openRootCreateMenu(event.currentTarget);
+										}}
+										aria-label="Create in Projects"
+										title="Create"
+									>
+										<Plus size={16} strokeWidth={2.25} />
+									</button>
+									<button
+										type="button"
+										class={styles.treeControlButton}
+										onClick={toggleAllFolders}
+										aria-label={treeControlLabel()}
+										title={treeControlLabel()}
+										disabled={totalFolderCount() === 0}
+									>
+										<Show
+											when={areAllFoldersCollapsed()}
+											fallback={<ListCollapse size={16} strokeWidth={2} />}
+										>
+											<UnfoldVertical size={16} strokeWidth={2} />
+										</Show>
+									</button>
+								</div>
+							</div>
+
+							<ProjectFolderBranch
+								nodes={projectTreeNodes()}
+								depth={0}
+								parentId={null}
+								selectedProjectId={selectedProject().id}
+								isFolderCollapsed={isFolderCollapsed}
+								onToggleFolder={toggleFolder}
+								onSelectProject={selectProject}
+								onOpenFolderMenu={openFolderMenu}
+								onOpenProjectMenu={openProjectMenu}
+								onNodePointerDown={handleNodePointerDown}
+								onNodePointerMove={handleNodePointerMove}
+								pendingFolderDraft={pendingFolderDraft()}
+								pendingFolderName={pendingFolderName()}
+								onPendingFolderNameChange={setPendingFolderName}
+								onSubmitPendingFolder={submitPendingFolder}
+								onCancelPendingFolder={cancelPendingFolder}
+								pendingFolderRename={pendingFolderRename()}
+								pendingFolderRenameName={pendingFolderRenameName()}
+								onPendingFolderRenameChange={setPendingFolderRenameName}
+								onSubmitPendingFolderRename={submitPendingFolderRename}
+								onCancelPendingFolderRename={cancelPendingFolderRename}
+								dragState={dragState()}
+								isTreeClickSuppressed={suppressNextTreeClick}
+							/>
+						</div>
+					</div>
+				</>
+			</Show>
+
+			<ProjectContextMenu
+				target={contextMenu.menuState()?.target ?? null}
+				position={contextMenuPosition()}
+				menuRef={setContextMenuElement}
+				onClose={contextMenu.closeMenu}
+				onSelect={handleContextActionSelect}
+			/>
+
+			<Show when={draggedNode()} keyed>
+				{(node): JSX.Element => {
+					const GhostIcon = node.kind === "folder" ? Folder : LayoutGrid;
+
+					return (
+						<Portal>
+							<div class={styles.dragGhostLayer} aria-hidden="true">
+								<div
+									class={styles.dragGhost}
+									style={{
+										"--drag-ghost-x": `${dragGhostPosition().x}px`,
+										"--drag-ghost-y": `${dragGhostPosition().y}px`,
+									}}
+								>
+									<GhostIcon class={styles.icon} size={18} strokeWidth={2} />
+									<div class={styles.dragGhostCopy}>
+										<div class={styles.dragGhostTitle}>{node.kind === "folder" ? node.label : node.item.name}</div>
+										<div class={styles.dragGhostMeta}>{draggedNodeMeta()}</div>
+									</div>
+								</div>
+							</div>
+						</Portal>
+					);
+				}}
+			</Show>
+		</div>
+	);
+};

Frontend/src/components/workspace-navigation/ProjectSelector/projectFolders.api.ts

@@ -0,0 +1,109 @@
+import { resolveAPIBase } from "../../../lib/api";
+import type { ProjectFoldersResponse } from "./ProjectSelector.data";
+
+const readProjectFoldersResponse = async (response: Response): Promise<ProjectFoldersResponse> =>
+	(await response.json()) as ProjectFoldersResponse;
+
+export const isValidProjectFolderProjectId = (projectId: string): boolean =>
+	Boolean(projectId);
+
+export const fetchProjectFolders = async (projectId: string): Promise<ProjectFoldersResponse> => {
+	const response = await fetch(`${resolveAPIBase()}/projects/${projectId}/folders`, {
+		headers: { Accept: "application/json" },
+	});
+	const body = await readProjectFoldersResponse(response);
+
+	if (!response.ok) {
+		throw new Error(body.message || "Failed to load project folders.");
+	}
+
+	return body;
+};
+
+export const createProjectFolderRequest = async (
+	projectId: string,
+	name: string,
+	parentFolderId: string | null,
+): Promise<ProjectFoldersResponse> => {
+	const response = await fetch(`${resolveAPIBase()}/projects/${projectId}/folders`, {
+		method: "POST",
+		headers: {
+			Accept: "application/json",
+			"Content-Type": "application/json",
+		},
+		body: JSON.stringify({ name, parentFolderId }),
+	});
+	const body = await readProjectFoldersResponse(response);
+
+	if (!response.ok) {
+		throw new Error(body.message || "Failed to create project folder.");
+	}
+
+	return body;
+};
+
+export const deleteProjectFolderRequest = async (
+	projectId: string,
+	folderId: string,
+): Promise<ProjectFoldersResponse> => {
+	const response = await fetch(`${resolveAPIBase()}/projects/${projectId}/folders?folderId=${encodeURIComponent(folderId)}`, {
+		method: "DELETE",
+		headers: { Accept: "application/json" },
+	});
+	const body = await readProjectFoldersResponse(response);
+
+	if (!response.ok) {
+		throw new Error(body.message || "Failed to delete project folder.");
+	}
+
+	return body;
+};
+
+export const moveProjectFolderRequest = async (
+	projectId: string,
+	payload: {
+		folderId: string;
+		folderNodeId: string;
+		parentFolderId: string | null;
+		parentNodeId: string | null;
+		targetIndex: number;
+	},
+): Promise<ProjectFoldersResponse> => {
+	const response = await fetch(`${resolveAPIBase()}/projects/${projectId}/folders/move`, {
+		method: "PATCH",
+		headers: {
+			Accept: "application/json",
+			"Content-Type": "application/json",
+		},
+		body: JSON.stringify(payload),
+	});
+	const body = await readProjectFoldersResponse(response);
+
+	if (!response.ok) {
+		throw new Error(body.message || "Failed to move project folder.");
+	}
+
+	return body;
+};
+
+export const renameProjectFolderRequest = async (
+	projectId: string,
+	folderId: string,
+	name: string,
+): Promise<ProjectFoldersResponse> => {
+	const response = await fetch(`${resolveAPIBase()}/projects/${projectId}/folders`, {
+		method: "PATCH",
+		headers: {
+			Accept: "application/json",
+			"Content-Type": "application/json",
+		},
+		body: JSON.stringify({ folderId, name }),
+	});
+	const body = await readProjectFoldersResponse(response);
+
+	if (!response.ok) {
+		throw new Error(body.message || "Failed to rename project folder.");
+	}
+
+	return body;
+};

Frontend/src/components/workspace-navigation/WorkspaceContextMenu/WorkspaceContextMenu.tsx

@@ -7,7 +7,7 @@ import {
 	type WorkspaceContextMenuAction,
 	type WorkspaceContextMenuShortcut,
 	type WorkspaceContextMenuTarget,
-} from "../data/shell.data";
+} from "../../app-shell/data/shell.data";
 import styles from "./WorkspaceContextMenu.module.scss";
 
 type ShortcutPlatform = "mac" | "windows";

Frontend/src/components/workspace-navigation/WorkspaceContextMenu/createWorkspaceContextMenuController.ts

@@ -1,5 +1,5 @@
 import { createEffect, createSignal, onCleanup } from "solid-js";
-import type { WorkspaceContextMenuTarget } from "../data/shell.data";
+import type { WorkspaceContextMenuTarget } from "../../app-shell/data/shell.data";
 
 type WorkspaceContextMenuState = {
 	target: WorkspaceContextMenuTarget;

Frontend/src/components/workspace-navigation/WorkspaceMobileActionSheet/WorkspaceMobileActionSheet.tsx

@@ -7,7 +7,7 @@ import {
 	type WorkspaceContextMenuAction,
 	type WorkspaceContextMenuSection,
 	type WorkspaceContextMenuTarget,
-} from "../data/shell.data";
+} from "../../app-shell/data/shell.data";
 import styles from "./WorkspaceMobileActionSheet.module.scss";
 
 type WorkspaceMobileActionSheetProps = {

Frontend/src/components/workspace-navigation/WorkspaceSidebar/WorkspaceSidebar.data.ts

@@ -0,0 +1,57 @@
+// Path: Frontend/src/components/workspace-navigation/WorkspaceSidebar/WorkspaceSidebar.data.ts
+
+import type { NavTreeAdapter, NavTreeDropTarget } from "../shared/navTreeDnd";
+import type { WorkspaceTreeNode } from "../../app-shell/data/shell.data";
+
+export type WorkspaceSidebarProps = {
+	collapsed: boolean;
+	railCollapsed: boolean;
+	onToggleRailCollapse: () => void;
+};
+
+export type PendingWorkspaceFolderDraft = {
+	parentId: string | null;
+	depth: number;
+};
+
+export type WorkspaceDragTarget = NavTreeDropTarget;
+
+export type WorkspaceDragState = {
+	draggedNodeId: string;
+	dropTarget: WorkspaceDragTarget | null;
+};
+
+export type DragGhostPosition = {
+	x: number;
+	y: number;
+};
+
+export type PendingWorkspaceFolderRename = {
+	folderId: string;
+	depth: number;
+};
+
+export const LONG_PRESS_MS = 320;
+
+export const getWorkspaceTreeNodeId = (node: WorkspaceTreeNode): string => node.id;
+
+export const countWorkspaceFolderSiblingsBeforeIndex = (
+	siblings: readonly WorkspaceTreeNode[],
+	index: number,
+): number => siblings.slice(0, index).filter((node) => node.kind === "folder").length;
+
+export const workspaceTreeAdapter: NavTreeAdapter<WorkspaceTreeNode> = {
+	getNodeId: getWorkspaceTreeNodeId,
+	isBranchNode: (node) => node.kind === "folder",
+	getChildren: (node) => (node.kind === "folder" ? (node.children ?? []) : []),
+	withChildren: (node, children) =>
+		node.kind === "folder"
+			? {
+				...node,
+				children: [...children],
+			}
+			: node,
+};
+
+export const isContextMenuKeyboardTrigger = (event: KeyboardEvent): boolean =>
+	event.key === "ContextMenu" || (event.shiftKey && event.key === "F10");

Frontend/src/components/workspace-navigation/WorkspaceSidebar/WorkspaceSidebar.hook.ts

@@ -0,0 +1,534 @@
+// Path: Frontend/src/components/workspace-navigation/WorkspaceSidebar/WorkspaceSidebar.hook.ts
+
+import { createEffect, createSignal, onCleanup, onMount } from "solid-js";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import {
+	createWorkspaceSurfaceTarget,
+	getWorkspaceItemTypeDefinition,
+	type WorkspaceContextMenuAction,
+	type WorkspaceContextMenuTarget,
+	type WorkspaceItemTypeId,
+	type WorkspaceTreeNode,
+} from "../../app-shell/data/shell.data";
+import {
+	collectBranchNodeIds,
+	findTreeNodeDepth,
+	findTreeNodeLocation,
+	getPointerRelativeY,
+	isUuidString,
+	moveTreeNode,
+	resolveTreeDropTarget,
+} from "../shared/navTreeDnd";
+import { useWorkspaceTreeData } from "../shared/useWorkspaceTreeData";
+import { createWorkspaceContextMenuController } from "../WorkspaceContextMenu/createWorkspaceContextMenuController";
+import {
+	countWorkspaceFolderSiblingsBeforeIndex,
+	getWorkspaceTreeNodeId,
+	LONG_PRESS_MS,
+	workspaceTreeAdapter,
+	type DragGhostPosition,
+	type PendingWorkspaceFolderDraft,
+	type PendingWorkspaceFolderRename,
+	type WorkspaceDragTarget,
+	type WorkspaceDragState,
+} from "./WorkspaceSidebar.data";
+
+export const useWorkspaceSidebar = () => {
+	const appShellData = useAppShellData();
+	const activeProject = () => appShellData.activeProject();
+	const [isProjectDrawerOpen, setIsProjectDrawerOpen] = createSignal(false);
+	const [collapsedFolderIds, setCollapsedFolderIds] = createSignal<readonly string[]>([]);
+	const [pendingFolderDraft, setPendingFolderDraft] = createSignal<PendingWorkspaceFolderDraft | null>(null);
+	const [pendingFolderName, setPendingFolderName] = createSignal("");
+	const [pendingFolderRename, setPendingFolderRename] = createSignal<PendingWorkspaceFolderRename | null>(null);
+	const [pendingFolderRenameName, setPendingFolderRenameName] = createSignal("");
+	const [dragState, setDragState] = createSignal<WorkspaceDragState | null>(null);
+	const [dragGhostPosition, setDragGhostPosition] = createSignal<DragGhostPosition>({ x: 0, y: 0 });
+	const [suppressNextTreeClick, setSuppressNextTreeClick] = createSignal(false);
+	let lastSelectedProjectId: string | null = null;
+	const {
+		workspaceTreeNodes,
+		setWorkspaceTreeNodes,
+		resolveFolderPath,
+		resolveItemPath,
+		createFolder,
+		renameFolder,
+		deleteFolder,
+		moveFolder,
+		createItem,
+		deleteItem,
+		moveItem,
+	} = useWorkspaceTreeData({
+		activeProjectId: () => activeProject()?.id ?? "",
+		fallbackWorkspaceTree: () => appShellData.workspaceTree(),
+	});
+	const contextMenu = createWorkspaceContextMenuController();
+	let longPressTimer: number | undefined;
+	let suppressClickTimer: number | undefined;
+	const sidebarContextMenuTarget = () => createWorkspaceSurfaceTarget(appShellData.activeProject());
+	const isFolderCollapsed = (folderId: string): boolean => collapsedFolderIds().includes(folderId);
+	const folderIds = (): string[] => collectBranchNodeIds(workspaceTreeNodes(), workspaceTreeAdapter);
+	const totalFolderCount = (): number => folderIds().length;
+	const areAllFoldersCollapsed = (): boolean => {
+		const count = totalFolderCount();
+		return count > 0 && collapsedFolderIds().length >= count;
+	};
+	const workspaceFolderToggleLabel = (): string =>
+		areAllFoldersCollapsed() ? "Expand all folders" : "Collapse all folders";
+	const toggleFolder = (folderId: string): void => {
+		setCollapsedFolderIds((current) =>
+			current.includes(folderId) ? current.filter((id) => id !== folderId) : [...current, folderId],
+		);
+	};
+	const expandAllFolders = (): void => {
+		setCollapsedFolderIds([]);
+	};
+	const collapseAllFolders = (): void => {
+		setCollapsedFolderIds(folderIds());
+	};
+	const toggleAllFolders = (): void => {
+		if (areAllFoldersCollapsed()) {
+			expandAllFolders();
+			return;
+		}
+
+		collapseAllFolders();
+	};
+	const resetWorkspaceTreeInteractionState = (): void => {
+		setCollapsedFolderIds([]);
+		setPendingFolderDraft(null);
+		setPendingFolderName("");
+		setPendingFolderRename(null);
+		setPendingFolderRenameName("");
+		setDragState(null);
+	};
+	const syncCollapsedFolderIds = (): void => {
+		const availableFolderIds = new Set(collectBranchNodeIds(workspaceTreeNodes(), workspaceTreeAdapter));
+		setCollapsedFolderIds((current) => current.filter((id) => availableFolderIds.has(id)));
+	};
+	const updateDragGhostPosition = (x: number, y: number): void => {
+		setDragGhostPosition({ x: x + 18, y: y + 18 });
+	};
+	const draggedNode = (): WorkspaceTreeNode | null => {
+		const currentDragState = dragState();
+		if (!currentDragState) {
+			return null;
+		}
+
+		return findTreeNodeLocation(workspaceTreeNodes(), currentDragState.draggedNodeId, workspaceTreeAdapter)?.node ?? null;
+	};
+	const draggedNodeMeta = (): string => {
+		const node = draggedNode();
+		if (!node) {
+			return "";
+		}
+
+		if (node.kind === "folder") {
+			return "Folder";
+		}
+
+		return getWorkspaceItemTypeDefinition(node.itemType).label;
+	};
+	const clearLongPressTimer = (): void => {
+		if (longPressTimer !== undefined) {
+			window.clearTimeout(longPressTimer);
+			longPressTimer = undefined;
+		}
+	};
+	const suppressTreeClickTemporarily = (): void => {
+		setSuppressNextTreeClick(true);
+
+		if (suppressClickTimer !== undefined) {
+			window.clearTimeout(suppressClickTimer);
+		}
+
+		suppressClickTimer = window.setTimeout(() => {
+			setSuppressNextTreeClick(false);
+			suppressClickTimer = undefined;
+		}, 80);
+	};
+
+	createEffect(() => {
+		syncCollapsedFolderIds();
+	});
+
+	createEffect(() => {
+		const projectId = activeProject()?.id ?? null;
+
+		if (lastSelectedProjectId === null) {
+			lastSelectedProjectId = projectId;
+			return;
+		}
+
+		if (projectId === lastSelectedProjectId) {
+			return;
+		}
+
+		lastSelectedProjectId = projectId;
+		resetWorkspaceTreeInteractionState();
+	});
+
+	onMount(() => {
+		const handlePointerMove = (event: PointerEvent): void => {
+			if (!dragState()) {
+				return;
+			}
+
+			updateDragGhostPosition(event.clientX, event.clientY);
+		};
+
+		const handlePointerUp = (): void => {
+			clearLongPressTimer();
+
+			const nextDragState = dragState();
+
+			if (!nextDragState?.dropTarget) {
+				if (nextDragState) {
+					suppressTreeClickTemporarily();
+				}
+				setDragState(null);
+				return;
+			}
+
+			suppressTreeClickTemporarily();
+
+			const currentNodes = workspaceTreeNodes();
+			const draggedLocation = findTreeNodeLocation(currentNodes, nextDragState.draggedNodeId, workspaceTreeAdapter);
+			const canPersistMove = isUuidString(activeProject()?.id ?? "");
+			const previewNodes = moveTreeNode(currentNodes, nextDragState.draggedNodeId, nextDragState.dropTarget as WorkspaceDragTarget, workspaceTreeAdapter);
+			const previewLocation = findTreeNodeLocation(previewNodes, nextDragState.draggedNodeId, workspaceTreeAdapter);
+			const persistedParentLocation = previewLocation?.parentId
+				? findTreeNodeLocation(previewNodes, previewLocation.parentId, workspaceTreeAdapter)
+				: null;
+			const previewSiblings = previewLocation?.parentId
+				? persistedParentLocation?.node.kind === "folder"
+					? persistedParentLocation.node.children ?? []
+					: []
+				: previewNodes;
+			const targetIndex = previewLocation
+				? countWorkspaceFolderSiblingsBeforeIndex(previewSiblings, previewLocation.index)
+				: 0;
+
+			if (
+				canPersistMove &&
+				draggedLocation?.node.kind === "folder" &&
+				(!previewLocation?.parentId || persistedParentLocation?.node.kind === "folder")
+			) {
+				void moveFolder(
+					draggedLocation.node.id,
+					persistedParentLocation?.node.kind === "folder" ? persistedParentLocation.node.id : null,
+					targetIndex,
+				);
+			} else if (
+				canPersistMove &&
+				draggedLocation?.node.kind === "item" &&
+				resolveItemPath(draggedLocation.node.id) &&
+				(!previewLocation?.parentId || persistedParentLocation?.node.kind === "folder")
+			) {
+				void moveItem(
+					draggedLocation.node.id,
+					persistedParentLocation?.node.kind === "folder" ? persistedParentLocation.node.id : null,
+					previewLocation?.index ?? 0,
+				);
+			} else {
+				setWorkspaceTreeNodes((current) =>
+					moveTreeNode(current, nextDragState.draggedNodeId, nextDragState.dropTarget as WorkspaceDragTarget, workspaceTreeAdapter),
+				);
+			}
+
+			setDragState(null);
+		};
+
+		const handleEscape = (event: KeyboardEvent): void => {
+			if (event.key !== "Escape") {
+				return;
+			}
+
+			clearLongPressTimer();
+
+			if (dragState()) {
+				setDragState(null);
+			}
+		};
+
+		window.addEventListener("pointerup", handlePointerUp);
+		window.addEventListener("pointercancel", handlePointerUp);
+		window.addEventListener("pointermove", handlePointerMove);
+		window.addEventListener("keydown", handleEscape);
+
+		onCleanup(() => {
+			clearLongPressTimer();
+			if (suppressClickTimer !== undefined) {
+				window.clearTimeout(suppressClickTimer);
+			}
+			window.removeEventListener("pointerup", handlePointerUp);
+			window.removeEventListener("pointercancel", handlePointerUp);
+			window.removeEventListener("pointermove", handlePointerMove);
+			window.removeEventListener("keydown", handleEscape);
+		});
+	});
+
+	const beginFolderDraft = (parentId: string | null, depth: number): void => {
+		if (parentId) {
+			setCollapsedFolderIds((current) => current.filter((id) => id !== parentId));
+		}
+
+		setPendingFolderRename(null);
+		setPendingFolderRenameName("");
+		setPendingFolderName("");
+		setPendingFolderDraft({ parentId, depth });
+	};
+
+	const beginFolderRename = (folderId: string, label: string, depth: number): void => {
+		setPendingFolderDraft(null);
+		setPendingFolderName("");
+		setPendingFolderRename({ folderId, depth });
+		setPendingFolderRenameName(label);
+	};
+
+	const submitPendingFolder = async (): Promise<void> => {
+		const name = pendingFolderName().trim();
+		const draft = pendingFolderDraft();
+		const projectId = activeProject()?.id ?? "";
+
+		if (!draft) {
+			return;
+		}
+
+		if (!name) {
+			setPendingFolderDraft(null);
+			setPendingFolderName("");
+			return;
+		}
+
+		if (!projectId || !isUuidString(projectId)) {
+			cancelPendingFolder();
+			return;
+		}
+
+		const parentFolderPath = draft.parentId ? resolveFolderPath(draft.parentId) : null;
+		if (draft.parentId && !parentFolderPath) {
+			cancelPendingFolder();
+			return;
+		}
+
+		const created = await createFolder(name, draft.parentId);
+		if (created) {
+			setPendingFolderDraft(null);
+			setPendingFolderName("");
+		}
+	};
+
+	const deletePersistedFolder = async (folderId: string): Promise<void> => {
+		const deleted = await deleteFolder(folderId);
+		if (deleted) {
+			setCollapsedFolderIds((current) => current.filter((id) => id !== folderId));
+		}
+	};
+
+	const submitPendingFolderRename = async (): Promise<void> => {
+		const draft = pendingFolderRename();
+		const name = pendingFolderRenameName().trim();
+		const projectId = activeProject()?.id ?? "";
+
+		if (!draft) {
+			return;
+		}
+
+		if (!name) {
+			setPendingFolderRename(null);
+			setPendingFolderRenameName("");
+			return;
+		}
+
+		if (!projectId || !isUuidString(projectId)) {
+			cancelPendingFolderRename();
+			return;
+		}
+
+		const folderPath = resolveFolderPath(draft.folderId);
+		if (!folderPath) {
+			cancelPendingFolderRename();
+			return;
+		}
+
+		const renamed = await renameFolder(draft.folderId, name);
+		if (renamed) {
+			setPendingFolderRename(null);
+			setPendingFolderRenameName("");
+		}
+	};
+
+	const cancelPendingFolder = (): void => {
+		setPendingFolderDraft(null);
+		setPendingFolderName("");
+	};
+
+	const cancelPendingFolderRename = (): void => {
+		setPendingFolderRename(null);
+		setPendingFolderRenameName("");
+	};
+
+	const handleHeaderActionClick = (actionId: string): void => {
+		switch (actionId) {
+			case "toggle-workspace-folders":
+				toggleAllFolders();
+				return;
+			case "search-workspace":
+			default:
+				return;
+		}
+	};
+
+	const openWorkspaceCreateMenu = (element: HTMLElement): void => {
+		contextMenu.openMenuFromElement(element, sidebarContextMenuTarget());
+	};
+
+	const resolveCreateItemType = (actionId: string): WorkspaceItemTypeId | null => {
+		switch (actionId) {
+			case "create-doc":
+				return "core.doc";
+			case "create-board":
+				return "core.board.kanban";
+			case "create-list-board":
+				return "core.board.list";
+			default:
+				return null;
+		}
+	};
+
+	const createPersistedItem = async (itemType: WorkspaceItemTypeId, parentId: string | null): Promise<void> => {
+		const definition = getWorkspaceItemTypeDefinition(itemType);
+		await createItem(definition.defaultCreateLabel, itemType, parentId);
+	};
+
+	const handleNodePointerDown = (event: PointerEvent, nodeId: string): void => {
+		if (event.button !== 0 || pendingFolderDraft()) {
+			return;
+		}
+
+		updateDragGhostPosition(event.clientX, event.clientY);
+		clearLongPressTimer();
+		longPressTimer = window.setTimeout(() => {
+			suppressTreeClickTemporarily();
+			setDragState({ draggedNodeId: nodeId, dropTarget: null });
+		}, LONG_PRESS_MS);
+	};
+
+	const handleNodePointerMove = (
+		event: PointerEvent,
+		parentId: string | null,
+		index: number,
+		node: WorkspaceTreeNode,
+	): void => {
+		const nextDragState = dragState();
+
+		if (!nextDragState || nextDragState.draggedNodeId === getWorkspaceTreeNodeId(node)) {
+			return;
+		}
+
+		const relativeY = getPointerRelativeY(event);
+		if (relativeY === null) {
+			return;
+		}
+
+		setDragState({
+			...nextDragState,
+			dropTarget: resolveTreeDropTarget({
+				parentId,
+				index,
+				node,
+				relativeY,
+				adapter: workspaceTreeAdapter,
+			}),
+		});
+	};
+
+	const handleContextActionSelect = (action: WorkspaceContextMenuAction, target: WorkspaceContextMenuTarget): void => {
+		const createItemType = resolveCreateItemType(action.id);
+		if (createItemType) {
+			switch (target.kind) {
+				case "workspace":
+				case "home":
+					void createPersistedItem(createItemType, null);
+					return;
+				case "folder":
+					void createPersistedItem(createItemType, target.id);
+					return;
+				case "settings":
+				case "item":
+					return;
+			}
+		}
+
+		switch (action.id) {
+			case "new-folder":
+				switch (target.kind) {
+					case "workspace":
+					case "home":
+						beginFolderDraft(null, 0);
+						return;
+					case "folder":
+						beginFolderDraft(target.id, (findTreeNodeDepth(workspaceTreeNodes(), target.id, workspaceTreeAdapter) ?? 0) + 1);
+						return;
+					case "settings":
+					case "item":
+						return;
+				}
+				return;
+			case "delete-folder":
+				if (target.kind === "folder") {
+					void deletePersistedFolder(target.id);
+				}
+				return;
+			case "rename-folder":
+				if (target.kind === "folder") {
+					beginFolderRename(target.id, target.label, findTreeNodeDepth(workspaceTreeNodes(), target.id, workspaceTreeAdapter) ?? 0);
+				}
+				return;
+			case "delete-doc":
+			case "delete-board":
+			case "delete-list-board":
+				if (target.kind === "item") {
+					void deleteItem(target.id);
+				}
+				return;
+			default:
+				return;
+		}
+	};
+
+	return {
+		activeProject,
+		contextMenu,
+		sidebarContextMenuTarget,
+		isProjectDrawerOpen,
+		setIsProjectDrawerOpen,
+		workspaceTreeNodes,
+		isFolderCollapsed,
+		pendingFolderDraft,
+		pendingFolderName,
+		setPendingFolderName,
+		submitPendingFolder,
+		cancelPendingFolder,
+		pendingFolderRename,
+		pendingFolderRenameName,
+		setPendingFolderRenameName,
+		submitPendingFolderRename,
+		cancelPendingFolderRename,
+		handleNodePointerDown,
+		handleNodePointerMove,
+		dragState,
+		suppressNextTreeClick,
+		draggedNode,
+		dragGhostPosition,
+		draggedNodeMeta,
+		workspaceFolderToggleLabel,
+		areAllFoldersCollapsed,
+		totalFolderCount,
+		handleHeaderActionClick,
+		openWorkspaceCreateMenu,
+		handleContextActionSelect,
+		toggleFolder,
+	};
+};

Frontend/src/components/workspace-navigation/WorkspaceSidebar/WorkspaceSidebar.module.scss

@@ -1,3 +1,5 @@
+@use "../shared/tree-nav" as treeNav;
+
 .sidebar {
   --sidebar-nav-item-min-height: var(--control-size-lg);
   position: relative;
@@ -117,56 +119,72 @@
 }
 
 .treeSectionLabel {
-  @include text-caption;
+	@include treeNav.section-label;
   margin: var(--space-3) 0 var(--space-2);
   padding: 0 var(--space-3);
-  color: var(--color-text-subtle);
-  text-transform: uppercase;
-  letter-spacing: 0.04em;
 }
 
-.treeList {
-  list-style: none;
-  display: grid;
-  gap: var(--space-1);
-  padding: 0;
-}
-
-.treeEmptySlot {
-	min-height: calc(var(--control-size-lg) - var(--space-2));
-	padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
-	border-radius: var(--radius-lg);
-	border: 1px dashed color-mix(in srgb, var(--color-border) 38%, transparent);
-	opacity: 0.35;
-}
-
-.treeInputRow {
-	width: 100%;
-	min-width: 0;
-	display: grid;
-	grid-template-columns: auto minmax(0, 1fr);
+.treeSectionHeader {
+	display: flex;
 	align-items: center;
+	justify-content: space-between;
 	gap: var(--space-2);
-	min-height: calc(var(--control-size-lg) - var(--space-2));
-	padding: var(--space-2) var(--space-3);
-	padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
-	border: 1px solid color-mix(in srgb, var(--color-border) 42%, transparent);
-	border-radius: var(--radius-lg);
-	background: color-mix(in srgb, var(--color-surface) 94%, transparent);
+	margin-top: var(--space-3);
+	margin-bottom: var(--space-2);
+	padding-right: var(--space-1);
 }
 
-.treeInput {
-	width: 100%;
-	min-width: 0;
-	border: 0;
-	background: transparent;
+.treeSectionHeader .treeSectionLabel {
+	margin: 0;
+}
+
+.treeControls {
+	display: inline-flex;
+	align-items: center;
+	gap: var(--space-1);
+	justify-content: flex-end;
+	padding-right: var(--space-2);
+}
+
+.treeControlButton {
+	display: inline-flex;
+	align-items: center;
+	justify-content: center;
+	width: calc(var(--control-size-md) - var(--space-1));
+	height: calc(var(--control-size-md) - var(--space-1));
+	padding: 0;
+	border: 1px solid color-mix(in srgb, var(--color-border) 46%, transparent);
+	border-radius: var(--radius-pill);
+	background: color-mix(in srgb, var(--color-surface) 95%, transparent);
+	color: var(--color-text-muted);
+	transition:
+		border-color 160ms var(--easing-standard),
+		background 160ms var(--easing-standard),
+		color 160ms var(--easing-standard);
+}
+
+.treeControlButton:hover,
+.treeControlButton:focus-visible {
+	border-color: color-mix(in srgb, var(--color-border-strong) 56%, transparent);
+	background: var(--color-surface-hover);
 	color: var(--color-text);
-	font: inherit;
 	outline: none;
 }
 
-.treeInput::placeholder {
-	color: var(--color-text-muted);
+.treeList {
+	@include treeNav.tree-list;
+}
+
+.treeEmptySlot {
+	@include treeNav.empty-slot;
+}
+
+.treeInputRow {
+	@include treeNav.input-row;
+}
+
+.treeInput {
+	@include treeNav.input;
 }
 
 .navItem {
@@ -184,74 +202,44 @@
 }
 
 .treeItem {
-  width: 100%;
-  min-width: 0;
-  display: grid;
-  grid-template-columns: auto auto minmax(0, 1fr) auto;
-  align-items: center;
-  gap: var(--space-2);
-  min-height: calc(var(--control-size-lg) - var(--space-2));
-  padding: var(--space-2) var(--space-3);
-  padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
-  border: 1px solid transparent;
-  border-radius: var(--radius-lg);
-  background: transparent;
-  color: var(--color-text-muted);
-  text-align: left;
-  transition:
-    background 160ms var(--easing-standard),
-    color 160ms var(--easing-standard),
-    border-color 160ms var(--easing-standard),
-    box-shadow 160ms var(--easing-standard),
-    transform 180ms var(--easing-standard);
+	@include treeNav.item;
 }
 
 .treeItem:hover,
 .treeItem:focus-visible {
-  background: color-mix(in srgb, var(--color-surface-hover) 80%, var(--color-accent-soft) 20%);
-  color: var(--color-text);
-  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
+	@include treeNav.item-hover;
 }
 
 .treeItemFolder {
-  color: var(--color-text);
+	@include treeNav.item-folder;
 }
 
 .treeItemDragging {
-	opacity: 0.45;
-	transform: scale(0.985);
-	box-shadow: none;
+	@include treeNav.item-dragging;
 }
 
 .treeItemDropBefore {
-	box-shadow: inset 0 2px 0 color-mix(in srgb, var(--color-accent-strong) 78%, transparent);
+	@include treeNav.item-drop-before;
 }
 
 .treeItemDropAfter {
-	box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--color-accent-strong) 78%, transparent);
+	@include treeNav.item-drop-after;
 }
 
 .treeItemDropInside {
-	border-color: color-mix(in srgb, var(--color-accent-strong) 55%, transparent);
-	background: color-mix(in srgb, var(--color-accent-soft) 36%, var(--color-surface));
-	color: var(--color-text);
-	box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
+	@include treeNav.item-drop-inside;
 }
 
 .folderChevron {
-  color: var(--color-text-muted);
-  transition: transform 160ms var(--easing-standard);
+	@include treeNav.folder-chevron;
 }
 
 .folderChevronOpen {
-  transform: rotate(90deg);
+	@include treeNav.folder-chevron-open;
 }
 
 .treeItemActive {
-  border-color: var(--color-border);
-  background: var(--color-surface);
-  color: var(--color-text);
-  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
+	@include treeNav.item-active;
 }
 
 .navItemActive {
@@ -262,18 +250,35 @@
 }
 
 .icon {
-  color: inherit;
-  opacity: 0.85;
+	@include treeNav.icon;
 }
 
 .label {
-  @include text-label;
-  min-width: 0;
+	@include treeNav.label;
 }
 
 .itemMeta {
-  @include text-caption;
-  color: var(--color-text-muted);
+	@include treeNav.item-meta;
+}
+
+.dragGhostLayer {
+	@include treeNav.drag-ghost-layer;
+}
+
+.dragGhost {
+	@include treeNav.drag-ghost;
+}
+
+.dragGhostCopy {
+	@include treeNav.drag-ghost-copy;
+}
+
+.dragGhostTitle {
+	@include treeNav.drag-ghost-title;
+}
+
+.dragGhostMeta {
+	@include treeNav.drag-ghost-meta;
 }
 
 .sidebarCollapsed {
@@ -309,6 +314,7 @@
 
 .sidebarCollapsed .label,
 .sidebarCollapsed .itemMeta,
+.sidebarCollapsed .treeSectionHeader,
 .sidebarCollapsed .treeSectionLabel,
 .sidebarCollapsed .treeList {
   display: none;