Feat: add persisted account theme settings

Backend/Dockerfile

@@ -6,6 +6,9 @@ WORKDIR /app
 
 RUN apk add --no-cache ca-certificates curl git tzdata && update-ca-certificates
 
+RUN mkdir -p /tmp/home /tmp/go/pkg/mod /tmp/go-build \
+	&& chmod 0777 /tmp/home /tmp/go /tmp/go/pkg /tmp/go/pkg/mod /tmp/go-build
+
 COPY go.mod go.sum ./
 RUN go mod download
 

Backend/go.mod

@@ -3,11 +3,13 @@ module moku-backend
 go 1.25.7
 
 require (
+	github.com/fxamacker/cbor/v2 v2.9.0
 	github.com/go-chi/chi/v5 v5.3.0
 	github.com/google/uuid v1.6.0
 	github.com/jackc/pgx/v5 v5.10.0
 	github.com/pressly/goose/v3 v3.27.1
 	github.com/redis/go-redis/v9 v9.20.1
+	github.com/tailscale/hujson v0.0.0-20250605163823-992244df8c5a
 )
 
 require (
@@ -17,6 +19,7 @@ require (
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/mfridman/interpolate v0.0.2 // indirect
 	github.com/sethvargo/go-retry v0.3.0 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/sync v0.20.0 // indirect

Backend/go.sum

@@ -9,8 +9,12 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
+github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
 github.com/go-chi/chi/v5 v5.3.0 h1:halUjDxhshgXHMrao5bB8eNBXo/rnzwr8m5m36glehM=
 github.com/go-chi/chi/v5 v5.3.0/go.mod h1:R+tYY2hNuVUUjxoPtqUdgBqevM9s9njzkTLutVsOCto=
+github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
+github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
@@ -44,6 +48,10 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/tailscale/hujson v0.0.0-20250605163823-992244df8c5a h1:a6TNDN9CgG+cYjaeN8l2mc4kSz2iMiCDQxPEyltUV/I=
+github.com/tailscale/hujson v0.0.0-20250605163823-992244df8c5a/go.mod h1:EbW0wDK/qEUYI0A5bqq0C2kF8JTQwWONmGDBbzsxxHo=
+github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
+github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
 github.com/zeebo/xxh3 v1.1.0 h1:s7DLGDK45Dyfg7++yxI0khrfwq9661w9EN78eP/UZVs=
 github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=

Backend/internal/bootstrap/bootstrap_helpers.go

@@ -0,0 +1,81 @@
+// Path: Backend/internal/bootstrap/bootstrap_helpers.go
+
+package bootstrap
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/jackc/pgx/v5"
+
+	"moku-backend/internal/database"
+)
+
+func NewService(db *database.DB, posixRoot string) *Service {
+	return &Service{db: db, posixRoot: strings.TrimSpace(posixRoot)}
+}
+
+func upsertNamedRecord(ctx context.Context, tx pgx.Tx, query string, args ...any) (namedRecord, error) {
+	var record namedRecord
+	if err := tx.QueryRow(ctx, query, args...).Scan(&record.ID, &record.Name, &record.Slug); err != nil {
+		return namedRecord{}, err
+	}
+
+	return record, nil
+}
+
+func upsertWorkspace(ctx context.Context, tx pgx.Tx, organizationID, name, slug, kind, createdByUserID string, departmentID, teamID, projectID *string) error {
+	_, err := tx.Exec(ctx, `
+		INSERT INTO workspaces (organization_id, name, slug, kind, created_by_user_id, department_id, team_id, project_id)
+		VALUES ($1::uuid, $2, $3, $4::workspace_kind, $5::uuid, $6::uuid, $7::uuid, $8::uuid)
+		ON CONFLICT (organization_id, slug) DO UPDATE
+		SET
+			name = EXCLUDED.name,
+			kind = EXCLUDED.kind,
+			created_by_user_id = EXCLUDED.created_by_user_id,
+			department_id = EXCLUDED.department_id,
+			team_id = EXCLUDED.team_id,
+			project_id = EXCLUDED.project_id,
+			updated_at = NOW();
+	`, organizationID, name, slug, kind, createdByUserID, departmentID, teamID, projectID)
+
+	return err
+}
+
+func defaultRootOrganizationName(installationName, mode, host, adminDisplayName string) string {
+	trimmedInstallationName := strings.TrimSpace(installationName)
+	trimmedHost := strings.TrimSpace(host)
+	trimmedAdminDisplayName := strings.TrimSpace(adminDisplayName)
+
+	if trimmedInstallationName != "" {
+		return trimmedInstallationName
+	}
+
+	if strings.EqualFold(mode, defaultInstallationMode) {
+		if trimmedAdminDisplayName != "" {
+			return fmt.Sprintf("%s %s", trimmedAdminDisplayName, defaultPersonalServerSuffix)
+		}
+
+		return defaultPersonalDisplayName
+	}
+
+	if trimmedHost != "" {
+		return trimmedHost
+	}
+
+	return defaultOrganizationName
+}
+
+func personalHomeTitle(displayName string) string {
+	trimmedDisplayName := strings.TrimSpace(displayName)
+	if trimmedDisplayName == "" {
+		return "Home"
+	}
+
+	if strings.HasSuffix(strings.ToLower(trimmedDisplayName), "s") {
+		return fmt.Sprintf("%s' Home", trimmedDisplayName)
+	}
+
+	return fmt.Sprintf("%s's Home", trimmedDisplayName)
+}

Backend/internal/bootstrap/bootstrap_types.go

@@ -0,0 +1,314 @@
+// Path: Backend/internal/bootstrap/bootstrap_types.go
+
+package bootstrap
+
+import (
+	"errors"
+
+	"moku-backend/internal/database"
+)
+
+const (
+	primaryOrganizationSlug       = "primary-organization"
+	primaryDepartmentSlug         = "primary-department"
+	primaryTeamSlug               = "primary-team"
+	primaryProjectSlug            = "primary-project"
+	organizationWorkspaceSlug     = "organization-home"
+	departmentWorkspaceSlug       = "department-home"
+	teamWorkspaceSlug             = "team-home"
+	projectWorkspaceSlug          = "project-home"
+	defaultInstallationHost       = "localhost"
+	defaultInstallationMode       = "personal"
+	defaultInstallationAccess     = "local"
+	defaultInstallationProtocol   = "http"
+	defaultOrganizationName       = "Moku"
+	defaultPersonalServerSuffix   = "Personal"
+	defaultPersonalDisplayName    = "Personal"
+	bootstrapWorkspaceKindOrg     = "organization"
+	bootstrapWorkspaceKindDept    = "department"
+	bootstrapWorkspaceKindTeam    = "team"
+	bootstrapWorkspaceKindProject = "project"
+	projectFolderOrderRootKey     = "__root__"
+	projectFolderOrderHierarchy   = "hierarchy"
+	projectFolderOrderTree        = "tree"
+)
+
+var (
+	ErrInstallationNotConfigured = errors.New("bootstrap installation step has not been completed")
+	ErrAdminNotConfigured        = errors.New("bootstrap admin step has not been completed")
+	ErrBootstrapStructureMissing = errors.New("bootstrap structure is incomplete")
+	ErrProjectNotFound           = errors.New("project not found")
+	ErrProjectFolderNotFound     = errors.New("project folder not found")
+	ErrProjectItemNotFound       = errors.New("project item not found")
+	ErrInvalidProjectFolderMove  = errors.New("invalid project folder move")
+	ErrInvalidProjectItemMove    = errors.New("invalid project item move")
+)
+
+type Service struct {
+	db        *database.DB
+	posixRoot string
+}
+
+type SaveInstanceInput struct {
+	Protocol string
+	Access   string
+	Host     string
+}
+
+type SaveModeInput struct {
+	Mode string
+	Name string
+}
+
+type SaveAdminInput struct {
+	DisplayName string
+	Email       string
+	Password    string
+}
+
+type SaveStructureInput struct {
+	OrganizationName string
+	DepartmentName   string
+	TeamName         string
+	ProjectName      string
+}
+
+type InstallationRecord struct {
+	ID                    string  `json:"id"`
+	Name                  string  `json:"name"`
+	Mode                  string  `json:"mode"`
+	Access                string  `json:"access"`
+	Protocol              string  `json:"protocol"`
+	Host                  string  `json:"host"`
+	IsBootstrapped        bool    `json:"isBootstrapped"`
+	MaterializationStatus string  `json:"materializationStatus"`
+	MaterializationError  *string `json:"materializationError,omitempty"`
+}
+
+type AdminRecord struct {
+	ID              string `json:"id"`
+	Email           string `json:"email"`
+	DisplayName     string `json:"displayName"`
+	IsInstanceAdmin bool   `json:"isInstanceAdmin"`
+	HomeTitle       string `json:"homeTitle"`
+	ThemePresetID   string `json:"themePresetId,omitempty"`
+}
+
+type SaveThemePresetInput struct {
+	PresetID string
+}
+
+type OrganizationRecord struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+	Slug string `json:"slug"`
+}
+
+type DepartmentRecord struct {
+	ID             string `json:"id"`
+	OrganizationID string `json:"organizationId"`
+	Name           string `json:"name"`
+	Slug           string `json:"slug"`
+}
+
+type TeamRecord struct {
+	ID             string  `json:"id"`
+	OrganizationID string  `json:"organizationId"`
+	DepartmentID   *string `json:"departmentId,omitempty"`
+	Name           string  `json:"name"`
+	Slug           string  `json:"slug"`
+}
+
+type ProjectRecord struct {
+	ID             string  `json:"id"`
+	OrganizationID string  `json:"organizationId"`
+	DepartmentID   *string `json:"departmentId,omitempty"`
+	TeamID         *string `json:"teamId,omitempty"`
+	Name           string  `json:"name"`
+	Slug           string  `json:"slug"`
+}
+
+type WorkspaceRecord struct {
+	ID             string  `json:"id"`
+	OrganizationID string  `json:"organizationId"`
+	Name           string  `json:"name"`
+	Slug           string  `json:"slug"`
+	Kind           string  `json:"kind"`
+	DepartmentID   *string `json:"departmentId,omitempty"`
+	TeamID         *string `json:"teamId,omitempty"`
+	ProjectID      *string `json:"projectId,omitempty"`
+}
+
+type StructureRecord struct {
+	Installation InstallationRecord `json:"installation"`
+	Organization namedRecord        `json:"organization"`
+	Department   namedRecord        `json:"department"`
+	Team         namedRecord        `json:"team"`
+	Project      namedRecord        `json:"project"`
+	Admin        AdminSummary       `json:"admin"`
+}
+
+type AdminSummary struct {
+	ID          string `json:"id"`
+	Email       string `json:"email"`
+	DisplayName string `json:"displayName"`
+}
+
+type BootstrapStructureState struct {
+	Organization *OrganizationRecord `json:"organization,omitempty"`
+	Department   *DepartmentRecord   `json:"department,omitempty"`
+	Team         *TeamRecord         `json:"team,omitempty"`
+	Project      *ProjectRecord      `json:"project,omitempty"`
+	Workspaces   []WorkspaceRecord   `json:"workspaces"`
+}
+
+type BootstrapState struct {
+	Installation *InstallationRecord     `json:"installation,omitempty"`
+	Admin        *AdminRecord            `json:"admin,omitempty"`
+	Structure    BootstrapStructureState `json:"structure"`
+}
+
+type AppShellState struct {
+	Installation  *InstallationRecord  `json:"installation,omitempty"`
+	Admin         *AdminRecord         `json:"admin,omitempty"`
+	Organizations []OrganizationRecord `json:"organizations"`
+	Departments   []DepartmentRecord   `json:"departments"`
+	Teams         []TeamRecord         `json:"teams"`
+	Projects      []ProjectRecord      `json:"projects"`
+	Workspaces    []WorkspaceRecord    `json:"workspaces"`
+}
+
+type namedRecord struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+	Slug string `json:"slug"`
+}
+
+type ProjectHierarchyFolderRecord struct {
+	ID       string                         `json:"id"`
+	Path     string                         `json:"path"`
+	Label    string                         `json:"label"`
+	Children []ProjectHierarchyFolderRecord `json:"children"`
+}
+
+type ProjectTreeNodeRecord struct {
+	ID       string                  `json:"id"`
+	Path     string                  `json:"path"`
+	Label    string                  `json:"label"`
+	Kind     string                  `json:"kind"`
+	ItemType string                  `json:"itemType,omitempty"`
+	Children []ProjectTreeNodeRecord `json:"children,omitempty"`
+}
+
+type CreateProjectFolderInput struct {
+	ProjectID        string
+	ParentFolderPath string
+	Name             string
+}
+
+type DeleteProjectFolderInput struct {
+	ProjectID  string
+	FolderPath string
+}
+
+type RenameProjectFolderInput struct {
+	ProjectID  string
+	FolderPath string
+	Name       string
+}
+
+type MoveProjectFolderInput struct {
+	ProjectID        string
+	FolderPath       string
+	FolderStableID   string
+	ParentFolderPath string
+	ParentStableID   string
+	TargetIndex      int
+}
+
+type CreateProjectItemInput struct {
+	ProjectID        string
+	ParentFolderPath string
+	Name             string
+	ItemType         string
+}
+
+type DeleteProjectItemInput struct {
+	ProjectID string
+	ItemPath  string
+}
+
+type MoveProjectItemInput struct {
+	ProjectID        string
+	ItemPath         string
+	ItemStableID     string
+	ParentFolderPath string
+	ParentStableID   string
+	TargetIndex      int
+}
+
+type CreateProjectFolderResult struct {
+	ProjectID     string                         `json:"projectId"`
+	CreatedFolder ProjectHierarchyFolderRecord   `json:"createdFolder"`
+	Folders       []ProjectHierarchyFolderRecord `json:"folders"`
+}
+
+type DeleteProjectFolderResult struct {
+	ProjectID             string                         `json:"projectId"`
+	DeletedFolderStableID string                         `json:"deletedFolderId"`
+	DeletedFolderPath     string                         `json:"deletedFolderPath"`
+	Folders               []ProjectHierarchyFolderRecord `json:"folders"`
+}
+
+type RenameProjectFolderResult struct {
+	ProjectID              string                         `json:"projectId"`
+	PreviousFolderStableID string                         `json:"previousFolderId"`
+	PreviousFolderPath     string                         `json:"previousFolderPath"`
+	RenamedFolder          ProjectHierarchyFolderRecord   `json:"renamedFolder"`
+	Folders                []ProjectHierarchyFolderRecord `json:"folders"`
+}
+
+type MoveProjectFolderResult struct {
+	ProjectID              string                         `json:"projectId"`
+	PreviousFolderStableID string                         `json:"previousFolderId"`
+	PreviousFolderPath     string                         `json:"previousFolderPath"`
+	MovedFolder            ProjectHierarchyFolderRecord   `json:"movedFolder"`
+	Folders                []ProjectHierarchyFolderRecord `json:"folders"`
+}
+
+type CreateProjectItemResult struct {
+	ProjectID   string                  `json:"projectId"`
+	CreatedItem ProjectTreeNodeRecord   `json:"createdItem"`
+	Nodes       []ProjectTreeNodeRecord `json:"nodes"`
+}
+
+type DeleteProjectItemResult struct {
+	ProjectID           string                  `json:"projectId"`
+	DeletedItemStableID string                  `json:"deletedItemId"`
+	DeletedItemPath     string                  `json:"deletedItemPath"`
+	Nodes               []ProjectTreeNodeRecord `json:"nodes"`
+}
+
+type MoveProjectItemResult struct {
+	ProjectID            string                  `json:"projectId"`
+	PreviousItemStableID string                  `json:"previousItemId"`
+	PreviousItemPath     string                  `json:"previousItemPath"`
+	MovedItem            ProjectTreeNodeRecord   `json:"movedItem"`
+	Nodes                []ProjectTreeNodeRecord `json:"nodes"`
+}
+
+type projectHierarchyFolderRow struct {
+	ID         string
+	Path       string
+	ParentPath string
+	Label      string
+}
+
+type projectTreeNodeRow struct {
+	ID         string
+	Path       string
+	ParentPath string
+	Label      string
+	Kind       string
+	ItemType   string
+}

Backend/internal/bootstrap/project_disk.go

@@ -0,0 +1,48 @@
+// Path: Backend/internal/bootstrap/project_disk.go
+
+package bootstrap
+
+import (
+	"path/filepath"
+)
+
+func (service *Service) createProjectHierarchyFolderOnDisk(projectSlug, parentFolderID, name string) (string, string, error) {
+	return service.createProjectFolderOnDisk(projectSlug, parentFolderID, name, projectHierarchyRootPath)
+}
+
+func (service *Service) createProjectTreeFolderOnDisk(projectSlug, parentFolderID, name string) (string, string, error) {
+	return service.createProjectFolderOnDisk(projectSlug, parentFolderID, name, projectTreeRootPath)
+}
+
+func (service *Service) deleteProjectHierarchyFolderOnDisk(projectSlug, folderID string) (string, error) {
+	return service.deleteProjectFolderOnDisk(projectSlug, folderID, projectHierarchyRootPath)
+}
+
+func (service *Service) deleteProjectTreeFolderOnDisk(projectSlug, folderID string) (string, error) {
+	return service.deleteProjectFolderOnDisk(projectSlug, folderID, projectTreeRootPath)
+}
+
+func (service *Service) renameProjectHierarchyFolderOnDisk(projectSlug, folderID, name string) (string, string, error) {
+	return service.renameProjectFolderOnDisk(projectSlug, folderID, name, projectHierarchyRootPath)
+}
+
+func (service *Service) renameProjectTreeFolderOnDisk(projectSlug, folderID, name string) (string, string, error) {
+	return service.renameProjectFolderOnDisk(projectSlug, folderID, name, projectTreeRootPath)
+}
+
+func (service *Service) moveProjectHierarchyFolderOnDisk(projectSlug, folderID, parentFolderID string) (string, string, error) {
+	return service.moveProjectFolderOnDisk(projectSlug, folderID, parentFolderID, projectHierarchyRootPath)
+}
+
+func (service *Service) moveProjectTreeFolderOnDisk(projectSlug, folderID, parentFolderID string) (string, string, error) {
+	return service.moveProjectFolderOnDisk(projectSlug, folderID, parentFolderID, projectTreeRootPath)
+}
+
+
+func projectHierarchyRootPath(projectSlug string) string {
+	return filepath.ToSlash(filepath.Join("projects", slugDir("project", projectSlug), "children"))
+}
+
+func projectTreeRootPath(projectSlug string) string {
+	return filepath.ToSlash(filepath.Join("projects", slugDir("project", projectSlug), "tree"))
+}

Backend/internal/bootstrap/project_disk_bootstrap.go

@@ -0,0 +1,260 @@
+// Path: Backend/internal/bootstrap/project_disk_bootstrap.go
+
+package bootstrap
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func (service *Service) ensureBootstrapPOSIXSkeleton(
+	installation InstallationRecord,
+	admin AdminSummary,
+	organization namedRecord,
+	department namedRecord,
+	team namedRecord,
+	project namedRecord,
+) error {
+	rootPath := strings.TrimSpace(service.posixRoot)
+	if rootPath == "" {
+		return nil
+	}
+
+	if err := os.MkdirAll(rootPath, 0o755); err != nil {
+		return fmt.Errorf("create POSIX root: %w", err)
+	}
+
+	if err := writeCBORFile(filepath.Join(rootPath, posixSettingsFileName), map[string]any{
+		"installation": map[string]any{
+			"id":             installation.ID,
+			"name":           installation.Name,
+			"mode":           installation.Mode,
+			"access":         installation.Access,
+			"protocol":       installation.Protocol,
+			"host":           installation.Host,
+			"isBootstrapped": installation.IsBootstrapped,
+		},
+		"organization": map[string]any{
+			"id":   organization.ID,
+			"name": organization.Name,
+			"slug": organization.Slug,
+		},
+	}); err != nil {
+		return fmt.Errorf("write tenant %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(rootPath, posixLayoutFileName), map[string]any{
+		"version": 1,
+		"type":    "tenant-layout",
+		"home": map[string]any{
+			"defaultProjectSlug": project.Slug,
+		},
+	}); err != nil {
+		return fmt.Errorf("write tenant %s: %w", posixLayoutFileName, err)
+	}
+
+	if err := os.MkdirAll(filepath.Join(rootPath, "catalog", "packs"), 0o755); err != nil {
+		return fmt.Errorf("create catalog packs root: %w", err)
+	}
+
+	if err := os.MkdirAll(filepath.Join(rootPath, "catalog", "standalone"), 0o755); err != nil {
+		return fmt.Errorf("create catalog standalone root: %w", err)
+	}
+
+	corePackPath := filepath.Join(rootPath, "catalog", "packs", "pack-core")
+	corePackEntriesPath := filepath.Join(corePackPath, "entries")
+	coreAppEntryPath := filepath.Join(corePackEntriesPath, "app-shell")
+	standaloneAppPath := filepath.Join(rootPath, "catalog", "standalone", "app-shell")
+
+	for _, dirPath := range []string{corePackPath, corePackEntriesPath, coreAppEntryPath, standaloneAppPath} {
+		if err := os.MkdirAll(dirPath, 0o755); err != nil {
+			return fmt.Errorf("create catalog directory %s: %w", dirPath, err)
+		}
+	}
+
+	if err := writeJSONCFile(filepath.Join(corePackPath, posixManifestFileName), map[string]any{
+		"id":          "pack-core",
+		"slug":        "core",
+		"type":        "pack",
+		"name":        "Core Pack",
+		"version":     "0.1.0",
+		"description": "First-party shared package of starter Moku surfaces.",
+		"entries": []map[string]any{{
+			"slug": "app-shell",
+			"path": "entries/app-shell",
+		}},
+		"capabilities": []string{"first-party", "bootstrap", "catalog-pack"},
+	}); err != nil {
+		return fmt.Errorf("write catalog pack %s: %w", posixManifestFileName, err)
+	}
+
+	if err := writeJSONCFile(filepath.Join(coreAppEntryPath, posixManifestFileName), map[string]any{
+		"id":          "app-shell",
+		"slug":        "app-shell",
+		"type":        "app",
+		"name":        "App Shell",
+		"version":     "0.1.0",
+		"description": "Primary shell surface for navigating the installation.",
+		"source":      "pack-core",
+		"runtime": map[string]any{
+			"kind": "route",
+			"path": "/v1/app-shell",
+		},
+		"capabilities": []string{"shell", "navigation", "workspace"},
+	}); err != nil {
+		return fmt.Errorf("write catalog entry %s: %w", posixManifestFileName, err)
+	}
+
+	if err := writeJSONCFile(filepath.Join(standaloneAppPath, posixManifestFileName), map[string]any{
+		"id":          "app-shell",
+		"slug":        "app-shell",
+		"type":        "app",
+		"name":        "App Shell",
+		"version":     "0.1.0",
+		"description": "Standalone registration for the primary shell surface.",
+		"source":      "standalone",
+		"runtime": map[string]any{
+			"kind": "route",
+			"path": "/v1/app-shell",
+		},
+		"capabilities": []string{"shell", "navigation", "standalone"},
+	}); err != nil {
+		return fmt.Errorf("write standalone entry %s: %w", posixManifestFileName, err)
+	}
+
+	departmentPath := filepath.Join(rootPath, "departments", slugDir("department", department.Slug))
+	teamPath := filepath.Join(departmentPath, "teams", slugDir("team", team.Slug))
+	projectPath := filepath.Join(rootPath, "projects", slugDir("project", project.Slug))
+	usersPath := filepath.Join(rootPath, "users")
+	personalName := strings.TrimSpace(admin.DisplayName)
+	if personalName == "" {
+		personalName = defaultPersonalDisplayName
+	}
+	personalSlug := normalizePOSIXSlug(personalName)
+	personalHomePath := filepath.Join(usersPath, "personals", slugDir("personal", personalSlug))
+
+	for _, dirPath := range []string{
+		departmentPath,
+		teamPath,
+		projectPath,
+		filepath.Join(projectPath, "children"),
+		filepath.Join(projectPath, "tree"),
+		filepath.Join(usersPath, "personals"),
+		personalHomePath,
+		filepath.Join(personalHomePath, "tree"),
+	} {
+		if err := os.MkdirAll(dirPath, 0o755); err != nil {
+			return fmt.Errorf("create POSIX directory %s: %w", dirPath, err)
+		}
+	}
+
+	if err := writeCBORFile(filepath.Join(departmentPath, posixSettingsFileName), map[string]any{
+		"id":   department.ID,
+		"name": department.Name,
+		"slug": department.Slug,
+		"type": "department",
+	}); err != nil {
+		return fmt.Errorf("write department %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(departmentPath, posixUsersFileName), map[string]any{
+		"owners": []map[string]string{{
+			"id":          admin.ID,
+			"email":       admin.Email,
+			"displayName": admin.DisplayName,
+		}},
+	}); err != nil {
+		return fmt.Errorf("write department %s: %w", posixUsersFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(teamPath, posixSettingsFileName), map[string]any{
+		"id":   team.ID,
+		"name": team.Name,
+		"slug": team.Slug,
+		"type": "team",
+	}); err != nil {
+		return fmt.Errorf("write team %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(teamPath, posixUsersFileName), map[string]any{
+		"owners": []map[string]string{{
+			"id":          admin.ID,
+			"email":       admin.Email,
+			"displayName": admin.DisplayName,
+		}},
+	}); err != nil {
+		return fmt.Errorf("write team %s: %w", posixUsersFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(projectPath, posixSettingsFileName), map[string]any{
+		"id":   project.ID,
+		"name": project.Name,
+		"slug": project.Slug,
+		"type": "project",
+	}); err != nil {
+		return fmt.Errorf("write project %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(projectPath, posixHomeFileName), map[string]any{
+		"type":  "project-home",
+		"title": project.Name,
+	}); err != nil {
+		return fmt.Errorf("write project %s: %w", posixHomeFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(projectPath, posixACLFileName), map[string]any{
+		"version":  1,
+		"inherits": true,
+		"rules":    []any{},
+	}); err != nil {
+		return fmt.Errorf("write project %s: %w", posixACLFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(usersPath, posixSettingsFileName), map[string]any{
+		"primaryAdminId": admin.ID,
+	}); err != nil {
+		return fmt.Errorf("write users %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(usersPath, posixDataFileName), map[string]any{
+		"admins": []map[string]string{{
+			"id":          admin.ID,
+			"email":       admin.Email,
+			"displayName": admin.DisplayName,
+		}},
+	}); err != nil {
+		return fmt.Errorf("write users %s: %w", posixDataFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(personalHomePath, posixSettingsFileName), map[string]any{
+		"type": "personal",
+		"name": personalName,
+		"slug": personalSlug,
+		"theme": map[string]any{
+			"presetId": "moku-midnight",
+		},
+	}); err != nil {
+		return fmt.Errorf("write personal %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(personalHomePath, posixLayoutFileName), map[string]any{
+		"version": 1,
+		"type":    "personal-layout",
+		"home": map[string]any{
+			"defaultProjectSlug": project.Slug,
+		},
+	}); err != nil {
+		return fmt.Errorf("write personal %s: %w", posixLayoutFileName, err)
+	}
+
+	if err := writeCBORFile(filepath.Join(personalHomePath, posixHomeFileName), map[string]any{
+		"type":  "personal-home",
+		"title": personalHomeTitle(personalName),
+	}); err != nil {
+		return fmt.Errorf("write personal %s: %w", posixHomeFileName, err)
+	}
+
+	return nil
+}

Backend/internal/bootstrap/project_disk_folders.go

@@ -0,0 +1,252 @@
+// Path: Backend/internal/bootstrap/project_disk_folders.go
+
+package bootstrap
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/google/uuid"
+)
+
+func (service *Service) createProjectFolderOnDisk(projectSlug, parentFolderID, name string, rootPathBuilder func(projectSlug string) string) (string, string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", "", fmt.Errorf("POSIX root is not configured")
+	}
+	trimmedName := strings.TrimSpace(name)
+	if trimmedName == "" {
+		return "", "", fmt.Errorf("folder name is required")
+	}
+	containerProjectionPath := rootPathBuilder(projectSlug)
+	parentDir := filepath.Join(posixRoot, filepath.FromSlash(containerProjectionPath))
+	if strings.TrimSpace(parentFolderID) != "" {
+		containerProjectionPath = filepath.ToSlash(filepath.Join(strings.TrimSpace(parentFolderID), "children"))
+		parentDir = filepath.Join(posixRoot, filepath.FromSlash(containerProjectionPath))
+		info, err := os.Stat(parentDir)
+		if err != nil {
+			if os.IsNotExist(err) {
+				return "", "", ErrProjectFolderNotFound
+			}
+			return "", "", fmt.Errorf("stat parent project folder: %w", err)
+		}
+		if !info.IsDir() {
+			return "", "", ErrProjectFolderNotFound
+		}
+	}
+	if err := os.MkdirAll(parentDir, 0o755); err != nil {
+		return "", "", fmt.Errorf("create parent project folder path: %w", err)
+	}
+	baseSlug := normalizePOSIXSlug(trimmedName)
+	folderName := slugDir("folder", baseSlug)
+	folderDir := filepath.Join(parentDir, folderName)
+	folderSlug := baseSlug
+	for attempt := 2; ; attempt += 1 {
+		if _, err := os.Stat(folderDir); os.IsNotExist(err) {
+			break
+		} else if err != nil {
+			return "", "", fmt.Errorf("stat candidate project folder: %w", err)
+		}
+		folderSlug = fmt.Sprintf("%s-%d", baseSlug, attempt)
+		folderName = slugDir("folder", folderSlug)
+		folderDir = filepath.Join(parentDir, folderName)
+	}
+	if err := os.MkdirAll(filepath.Join(folderDir, "children"), 0o755); err != nil {
+		return "", "", fmt.Errorf("create project hierarchy folder: %w", err)
+	}
+	folderID := uuid.NewString()
+	if err := writeCBORFile(filepath.Join(folderDir, posixFolderFileName), map[string]any{"id": folderID, "name": trimmedName, "slug": folderSlug, "type": "folder"}); err != nil {
+		return "", "", fmt.Errorf("write project %s: %w", posixFolderFileName, err)
+	}
+	if err := writeCBORFile(filepath.Join(folderDir, posixACLFileName), map[string]any{"version": 1, "inherits": true, "rules": []any{}}); err != nil {
+		return "", "", fmt.Errorf("write project %s: %w", posixACLFileName, err)
+	}
+	return filepath.ToSlash(filepath.Join(containerProjectionPath, folderName)), folderSlug, nil
+}
+
+func (service *Service) deleteProjectFolderOnDisk(projectSlug, folderID string, rootPathBuilder func(projectSlug string) string) (string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", fmt.Errorf("POSIX root is not configured")
+	}
+	trimmedFolderID := strings.TrimSpace(folderID)
+	if trimmedFolderID == "" {
+		return "", ErrProjectFolderNotFound
+	}
+	rootProjectionPath := rootPathBuilder(projectSlug)
+	folderProjectionPath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+trimmedFolderID)), "/")
+	if folderProjectionPath == "." || folderProjectionPath == rootProjectionPath || !strings.HasPrefix(folderProjectionPath, rootProjectionPath+"/") {
+		return "", ErrProjectFolderNotFound
+	}
+	folderDir := filepath.Join(posixRoot, filepath.FromSlash(folderProjectionPath))
+	info, err := os.Stat(folderDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", ErrProjectFolderNotFound
+		}
+		return "", fmt.Errorf("stat project folder: %w", err)
+	}
+	if !info.IsDir() {
+		return "", ErrProjectFolderNotFound
+	}
+	if err := os.RemoveAll(folderDir); err != nil {
+		return "", fmt.Errorf("delete project folder: %w", err)
+	}
+	return folderProjectionPath, nil
+}
+
+func (service *Service) renameProjectFolderOnDisk(projectSlug, folderID, name string, rootPathBuilder func(projectSlug string) string) (string, string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", "", fmt.Errorf("POSIX root is not configured")
+	}
+	trimmedFolderID := strings.TrimSpace(folderID)
+	if trimmedFolderID == "" {
+		return "", "", ErrProjectFolderNotFound
+	}
+	trimmedName := strings.TrimSpace(name)
+	if trimmedName == "" {
+		return "", "", fmt.Errorf("folder name is required")
+	}
+	rootProjectionPath := rootPathBuilder(projectSlug)
+	folderProjectionPath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+trimmedFolderID)), "/")
+	if folderProjectionPath == "." || folderProjectionPath == rootProjectionPath || !strings.HasPrefix(folderProjectionPath, rootProjectionPath+"/") {
+		return "", "", ErrProjectFolderNotFound
+	}
+	folderDir := filepath.Join(posixRoot, filepath.FromSlash(folderProjectionPath))
+	info, err := os.Stat(folderDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", "", ErrProjectFolderNotFound
+		}
+		return "", "", fmt.Errorf("stat project folder: %w", err)
+	}
+	if !info.IsDir() {
+		return "", "", ErrProjectFolderNotFound
+	}
+	parentDir := filepath.Dir(folderDir)
+	baseSlug := normalizePOSIXSlug(trimmedName)
+	folderName := slugDir("folder", baseSlug)
+	folderSlug := baseSlug
+	destinationDir := filepath.Join(parentDir, folderName)
+	for attempt := 2; ; attempt += 1 {
+		if destinationDir == folderDir {
+			break
+		}
+		if _, err := os.Stat(destinationDir); os.IsNotExist(err) {
+			break
+		} else if err != nil {
+			return "", "", fmt.Errorf("stat candidate renamed project folder: %w", err)
+		}
+		folderSlug = fmt.Sprintf("%s-%d", baseSlug, attempt)
+		folderName = slugDir("folder", folderSlug)
+		destinationDir = filepath.Join(parentDir, folderName)
+	}
+	renamedProjectionPath := filepath.ToSlash(filepath.Join(filepath.Dir(folderProjectionPath), folderName))
+	if destinationDir != folderDir {
+		if err := os.Rename(folderDir, destinationDir); err != nil {
+			return "", "", fmt.Errorf("rename project folder: %w", err)
+		}
+	}
+	folderPayload := readStructuredFileMap(filepath.Join(destinationDir, posixFolderFileName))
+	folderMetadataID, _ := folderPayload["id"].(string)
+	if strings.TrimSpace(folderMetadataID) == "" {
+		folderMetadataID = uuid.NewString()
+	}
+	if err := writeCBORFile(filepath.Join(destinationDir, posixFolderFileName), map[string]any{"id": folderMetadataID, "name": trimmedName, "slug": folderSlug, "type": "folder"}); err != nil {
+		return "", "", fmt.Errorf("write renamed project %s: %w", posixFolderFileName, err)
+	}
+	return folderProjectionPath, renamedProjectionPath, nil
+}
+
+func (service *Service) moveProjectFolderOnDisk(projectSlug, folderID, parentFolderID string, rootPathBuilder func(projectSlug string) string) (string, string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", "", fmt.Errorf("POSIX root is not configured")
+	}
+	rootProjectionPath := rootPathBuilder(projectSlug)
+	folderProjectionPath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+strings.TrimSpace(folderID))), "/")
+	if folderProjectionPath == "." || folderProjectionPath == rootProjectionPath || !strings.HasPrefix(folderProjectionPath, rootProjectionPath+"/") {
+		return "", "", ErrProjectFolderNotFound
+	}
+	folderDir := filepath.Join(posixRoot, filepath.FromSlash(folderProjectionPath))
+	info, err := os.Stat(folderDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", "", ErrProjectFolderNotFound
+		}
+		return "", "", fmt.Errorf("stat project folder: %w", err)
+	}
+	if !info.IsDir() {
+		return "", "", ErrProjectFolderNotFound
+	}
+	trimmedParentFolderID := strings.TrimSpace(parentFolderID)
+	parentChildrenProjectionPath := rootProjectionPath
+	parentDir := filepath.Join(posixRoot, filepath.FromSlash(rootProjectionPath))
+	if trimmedParentFolderID != "" {
+		parentProjectionPath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+trimmedParentFolderID)), "/")
+		if parentProjectionPath == "." || parentProjectionPath == rootProjectionPath || !strings.HasPrefix(parentProjectionPath, rootProjectionPath+"/") {
+			return "", "", ErrProjectFolderNotFound
+		}
+		if parentProjectionPath == folderProjectionPath || strings.HasPrefix(parentProjectionPath, folderProjectionPath+"/children/") {
+			return "", "", ErrInvalidProjectFolderMove
+		}
+		parentChildrenProjectionPath = filepath.ToSlash(filepath.Join(parentProjectionPath, "children"))
+		parentDir = filepath.Join(posixRoot, filepath.FromSlash(parentChildrenProjectionPath))
+	}
+	parentInfo, err := os.Stat(parentDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", "", ErrProjectFolderNotFound
+		}
+		return "", "", fmt.Errorf("stat project folder parent: %w", err)
+	}
+	if !parentInfo.IsDir() {
+		return "", "", ErrProjectFolderNotFound
+	}
+	currentParentDir := filepath.Dir(folderDir)
+	if samePath(currentParentDir, parentDir) {
+		return folderProjectionPath, folderProjectionPath, nil
+	}
+	folderPayload := readStructuredFileMap(filepath.Join(folderDir, posixFolderFileName))
+	folderMetadataID, _ := folderPayload["id"].(string)
+	if strings.TrimSpace(folderMetadataID) == "" {
+		folderMetadataID = uuid.NewString()
+	}
+	folderName, _ := folderPayload["name"].(string)
+	if strings.TrimSpace(folderName) == "" {
+		folderName = fallbackFolderLabel(folderProjectionPath)
+	}
+	currentBase := filepath.Base(folderDir)
+	baseSlug := strings.TrimPrefix(currentBase, "folder-")
+	if strings.TrimSpace(baseSlug) == "" {
+		baseSlug = normalizePOSIXSlug(folderName)
+	}
+	folderSlug := baseSlug
+	folderDirName := slugDir("folder", folderSlug)
+	destinationDir := filepath.Join(parentDir, folderDirName)
+	for attempt := 2; ; attempt += 1 {
+		if _, err := os.Stat(destinationDir); os.IsNotExist(err) {
+			break
+		} else if err != nil {
+			return "", "", fmt.Errorf("stat candidate moved project folder: %w", err)
+		}
+		folderSlug = fmt.Sprintf("%s-%d", baseSlug, attempt)
+		folderDirName = slugDir("folder", folderSlug)
+		destinationDir = filepath.Join(parentDir, folderDirName)
+	}
+	if err := os.Rename(folderDir, destinationDir); err != nil {
+		return "", "", fmt.Errorf("move project folder: %w", err)
+	}
+	folderPayload["id"] = folderMetadataID
+	folderPayload["name"] = folderName
+	folderPayload["slug"] = folderSlug
+	folderPayload["type"] = "folder"
+	if err := writeCBORFile(filepath.Join(destinationDir, posixFolderFileName), folderPayload); err != nil {
+		return "", "", fmt.Errorf("write moved project %s: %w", posixFolderFileName, err)
+	}
+	movedProjectionPath := filepath.ToSlash(filepath.Join(parentChildrenProjectionPath, folderDirName))
+	return folderProjectionPath, movedProjectionPath, nil
+}

Backend/internal/bootstrap/project_disk_helpers.go

@@ -0,0 +1,233 @@
+// Path: Backend/internal/bootstrap/project_disk_helpers.go
+
+package bootstrap
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"unicode"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/tailscale/hujson"
+)
+
+const (
+	posixSettingsFileName = "settings.cbor"
+	posixLayoutFileName   = "layout.cbor"
+	posixHomeFileName     = "home.cbor"
+	posixUsersFileName    = "users.cbor"
+	posixACLFileName      = "acl.cbor"
+	posixFolderFileName   = "folder.cbor"
+	posixItemFileName     = "item.cbor"
+	posixDataFileName     = "data.cbor"
+	posixSchemaFileName   = "schema.json"
+	posixManifestFileName = "manifest.jsonc"
+)
+
+func samePath(left, right string) bool {
+	cleanLeft := filepath.Clean(left)
+	cleanRight := filepath.Clean(right)
+	if cleanLeft == cleanRight {
+		return true
+	}
+	leftInfo, leftErr := os.Stat(cleanLeft)
+	rightInfo, rightErr := os.Stat(cleanRight)
+	if leftErr == nil && rightErr == nil {
+		return os.SameFile(leftInfo, rightInfo)
+	}
+	return false
+}
+
+func normalizePOSIXSlug(value string) string {
+	trimmed := strings.TrimSpace(strings.ToLower(value))
+	if trimmed == "" {
+		return "untitled"
+	}
+	var builder strings.Builder
+	lastDash := false
+	for _, r := range trimmed {
+		switch {
+		case unicode.IsLetter(r) || unicode.IsDigit(r):
+			builder.WriteRune(r)
+			lastDash = false
+		case r == '-' || r == '_' || unicode.IsSpace(r):
+			if !lastDash && builder.Len() > 0 {
+				builder.WriteByte('-')
+				lastDash = true
+			}
+		}
+	}
+	slug := strings.Trim(builder.String(), "-")
+	if slug == "" {
+		return "untitled"
+	}
+	return slug
+}
+
+func fallbackFolderLabel(path string) string {
+	base := filepath.Base(filepath.FromSlash(path))
+	trimmed := strings.TrimPrefix(base, "folder-")
+	parts := strings.FieldsFunc(trimmed, func(r rune) bool { return r == '-' || r == '_' })
+	for index, part := range parts {
+		if part != "" {
+			parts[index] = strings.ToUpper(part[:1]) + part[1:]
+		}
+	}
+	label := strings.Join(parts, " ")
+	if label == "" {
+		return base
+	}
+	return label
+}
+
+func fallbackItemLabel(path string) string {
+	base := filepath.Base(filepath.FromSlash(path))
+	trimmed := strings.TrimPrefix(base, "item-")
+	parts := strings.FieldsFunc(trimmed, func(r rune) bool { return r == '-' || r == '_' })
+	for index, part := range parts {
+		if part != "" {
+			parts[index] = strings.ToUpper(part[:1]) + part[1:]
+		}
+	}
+	label := strings.Join(parts, " ")
+	if label == "" {
+		return base
+	}
+	return label
+}
+
+func normalizeProjectTreeItemType(itemType string) string {
+	switch strings.TrimSpace(strings.ToLower(itemType)) {
+	case "", "board", "core.board", "core.board.kanban", "kanban":
+		return "core.board.kanban"
+	case "core.doc", "doc", "document":
+		return "core.doc"
+	case "core.board.list", "list", "list-board":
+		return "core.board.list"
+	default:
+		return strings.TrimSpace(itemType)
+	}
+}
+
+func defaultProjectTreeItemSchema(itemType string) map[string]any {
+	return map[string]any{"type": "object", "itemType": normalizeProjectTreeItemType(itemType)}
+}
+
+func defaultProjectTreeItemData(itemType, name string) map[string]any {
+	return map[string]any{"title": strings.TrimSpace(name), "itemType": normalizeProjectTreeItemType(itemType)}
+}
+
+func slugDir(prefix, slug string) string {
+	trimmedSlug := strings.TrimSpace(slug)
+	if trimmedSlug == "" {
+		return prefix
+	}
+	return fmt.Sprintf("%s-%s", prefix, trimmedSlug)
+}
+
+func writeJSONFile(path string, payload any) error {
+	parentDir := filepath.Dir(path)
+	if err := os.MkdirAll(parentDir, 0o755); err != nil {
+		return err
+	}
+	data, err := json.MarshalIndent(payload, "", "  ")
+	if err != nil {
+		return err
+	}
+	data = append(data, '\n')
+	return os.WriteFile(path, data, 0o644)
+}
+
+func writeJSONCFile(path string, payload any) error {
+	parentDir := filepath.Dir(path)
+	if err := os.MkdirAll(parentDir, 0o755); err != nil {
+		return err
+	}
+	data, err := json.MarshalIndent(payload, "", "  ")
+	if err != nil {
+		return err
+	}
+	content := append([]byte("// This file is JSONC. Comments and trailing commas are allowed.\n"), data...)
+	content = append(content, '\n')
+	return os.WriteFile(path, content, 0o644)
+}
+
+func writeCBORFile(path string, payload any) error {
+	parentDir := filepath.Dir(path)
+	if err := os.MkdirAll(parentDir, 0o755); err != nil {
+		return err
+	}
+	data, err := cbor.Marshal(payload)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, data, 0o644)
+}
+
+func readStructuredFileMap(path string) map[string]any {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return map[string]any{}
+	}
+	var payload any
+	switch strings.ToLower(filepath.Ext(path)) {
+	case ".cbor":
+		err = cbor.Unmarshal(data, &payload)
+	case ".json":
+		err = json.Unmarshal(data, &payload)
+	case ".jsonc":
+		payload, err = decodeJSONCToAny(data)
+	default:
+		return map[string]any{}
+	}
+	if err != nil || payload == nil {
+		return map[string]any{}
+	}
+	normalized, ok := normalizeStructuredValue(payload).(map[string]any)
+	if !ok || normalized == nil {
+		return map[string]any{}
+	}
+	return normalized
+}
+
+func decodeJSONCToAny(data []byte) (any, error) {
+	ast, err := hujson.Parse(data)
+	if err != nil {
+		return nil, err
+	}
+	ast.Standardize()
+	standardized := ast.Pack()
+	var payload any
+	if err := json.Unmarshal(standardized, &payload); err != nil {
+		return nil, err
+	}
+	return payload, nil
+}
+
+func normalizeStructuredValue(value any) any {
+	switch typed := value.(type) {
+	case map[string]any:
+		normalized := make(map[string]any, len(typed))
+		for key, child := range typed {
+			normalized[key] = normalizeStructuredValue(child)
+		}
+		return normalized
+	case map[any]any:
+		normalized := make(map[string]any, len(typed))
+		for key, child := range typed {
+			normalized[fmt.Sprint(key)] = normalizeStructuredValue(child)
+		}
+		return normalized
+	case []any:
+		normalized := make([]any, len(typed))
+		for index, child := range typed {
+			normalized[index] = normalizeStructuredValue(child)
+		}
+		return normalized
+	default:
+		return value
+	}
+}

Backend/internal/bootstrap/project_disk_items.go

@@ -0,0 +1,189 @@
+// Path: Backend/internal/bootstrap/project_disk_items.go
+
+package bootstrap
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/google/uuid"
+)
+
+func (service *Service) createProjectTreeItemOnDisk(projectSlug, parentFolderPath, name, itemType string) (string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", fmt.Errorf("POSIX root is not configured")
+	}
+	trimmedName := strings.TrimSpace(name)
+	if trimmedName == "" {
+		return "", fmt.Errorf("item name is required")
+	}
+	canonicalItemType := normalizeProjectTreeItemType(itemType)
+	containerProjectionPath := projectTreeRootPath(projectSlug)
+	parentDir := filepath.Join(posixRoot, filepath.FromSlash(containerProjectionPath))
+	if trimmedParentFolderPath := strings.TrimSpace(parentFolderPath); trimmedParentFolderPath != "" {
+		containerProjectionPath = trimmedParentFolderPath
+		parentDir = filepath.Join(posixRoot, filepath.FromSlash(containerProjectionPath))
+		info, err := os.Stat(parentDir)
+		if err != nil {
+			if os.IsNotExist(err) {
+				return "", ErrProjectFolderNotFound
+			}
+			return "", fmt.Errorf("stat parent project folder: %w", err)
+		}
+		if !info.IsDir() {
+			return "", ErrProjectFolderNotFound
+		}
+	}
+	if err := os.MkdirAll(parentDir, 0o755); err != nil {
+		return "", fmt.Errorf("create parent project item path: %w", err)
+	}
+	baseSlug := normalizePOSIXSlug(trimmedName)
+	itemDirName := slugDir("item", baseSlug)
+	itemDir := filepath.Join(parentDir, itemDirName)
+	itemSlug := baseSlug
+	for attempt := 2; ; attempt += 1 {
+		if _, err := os.Stat(itemDir); os.IsNotExist(err) {
+			break
+		} else if err != nil {
+			return "", fmt.Errorf("stat candidate project item: %w", err)
+		}
+		itemSlug = fmt.Sprintf("%s-%d", baseSlug, attempt)
+		itemDirName = slugDir("item", itemSlug)
+		itemDir = filepath.Join(parentDir, itemDirName)
+	}
+	if err := os.MkdirAll(itemDir, 0o755); err != nil {
+		return "", fmt.Errorf("create project item: %w", err)
+	}
+	itemID := uuid.NewString()
+	if err := writeCBORFile(filepath.Join(itemDir, posixItemFileName), map[string]any{"id": itemID, "name": trimmedName, "slug": itemSlug, "type": canonicalItemType}); err != nil {
+		return "", fmt.Errorf("write project %s: %w", posixItemFileName, err)
+	}
+	if err := writeJSONFile(filepath.Join(itemDir, posixSchemaFileName), defaultProjectTreeItemSchema(canonicalItemType)); err != nil {
+		return "", fmt.Errorf("write project %s: %w", posixSchemaFileName, err)
+	}
+	if err := writeCBORFile(filepath.Join(itemDir, posixDataFileName), defaultProjectTreeItemData(canonicalItemType, trimmedName)); err != nil {
+		return "", fmt.Errorf("write project %s: %w", posixDataFileName, err)
+	}
+	return filepath.ToSlash(filepath.Join(containerProjectionPath, itemDirName)), nil
+}
+
+func (service *Service) deleteProjectTreeItemOnDisk(projectSlug, itemPath string) (string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", fmt.Errorf("POSIX root is not configured")
+	}
+	rootProjectionPath := projectTreeRootPath(projectSlug)
+	itemProjectionPath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+strings.TrimSpace(itemPath))), "/")
+	if itemProjectionPath == "." || itemProjectionPath == rootProjectionPath || !strings.HasPrefix(itemProjectionPath, rootProjectionPath+"/") {
+		return "", ErrProjectItemNotFound
+	}
+	itemDir := filepath.Join(posixRoot, filepath.FromSlash(itemProjectionPath))
+	info, err := os.Stat(itemDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", ErrProjectItemNotFound
+		}
+		return "", fmt.Errorf("stat project item: %w", err)
+	}
+	if !info.IsDir() {
+		return "", ErrProjectItemNotFound
+	}
+	if err := os.RemoveAll(itemDir); err != nil {
+		return "", fmt.Errorf("delete project item: %w", err)
+	}
+	return itemProjectionPath, nil
+}
+
+func (service *Service) moveProjectTreeItemOnDisk(projectSlug, itemPath, parentFolderPath string) (string, string, error) {
+	posixRoot := strings.TrimSpace(service.posixRoot)
+	if posixRoot == "" {
+		return "", "", fmt.Errorf("POSIX root is not configured")
+	}
+	rootProjectionPath := projectTreeRootPath(projectSlug)
+	itemProjectionPath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+strings.TrimSpace(itemPath))), "/")
+	if itemProjectionPath == "." || itemProjectionPath == rootProjectionPath || !strings.HasPrefix(itemProjectionPath, rootProjectionPath+"/") {
+		return "", "", ErrProjectItemNotFound
+	}
+	itemDir := filepath.Join(posixRoot, filepath.FromSlash(itemProjectionPath))
+	info, err := os.Stat(itemDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", "", ErrProjectItemNotFound
+		}
+		return "", "", fmt.Errorf("stat project item: %w", err)
+	}
+	if !info.IsDir() {
+		return "", "", ErrProjectItemNotFound
+	}
+	trimmedParentFolderPath := strings.TrimSpace(parentFolderPath)
+	parentProjectionPath := rootProjectionPath
+	parentDir := filepath.Join(posixRoot, filepath.FromSlash(parentProjectionPath))
+	if trimmedParentFolderPath != "" {
+		parentProjectionPath = strings.TrimPrefix(filepath.ToSlash(filepath.Clean("/"+trimmedParentFolderPath)), "/")
+		if parentProjectionPath == "." || parentProjectionPath == rootProjectionPath || !strings.HasPrefix(parentProjectionPath, rootProjectionPath+"/") {
+			return "", "", ErrProjectFolderNotFound
+		}
+		parentDir = filepath.Join(posixRoot, filepath.FromSlash(parentProjectionPath))
+	}
+	parentInfo, err := os.Stat(parentDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", "", ErrProjectFolderNotFound
+		}
+		return "", "", fmt.Errorf("stat project item parent: %w", err)
+	}
+	if !parentInfo.IsDir() {
+		return "", "", ErrProjectFolderNotFound
+	}
+	currentParentDir := filepath.Dir(itemDir)
+	currentBase := filepath.Base(itemDir)
+	itemPayload := readStructuredFileMap(filepath.Join(itemDir, posixItemFileName))
+	itemID, _ := itemPayload["id"].(string)
+	if strings.TrimSpace(itemID) == "" {
+		itemID = uuid.NewString()
+	}
+	itemName, _ := itemPayload["name"].(string)
+	if strings.TrimSpace(itemName) == "" {
+		itemName = fallbackItemLabel(itemProjectionPath)
+	}
+	itemType, _ := itemPayload["type"].(string)
+	canonicalItemType := normalizeProjectTreeItemType(itemType)
+	baseSlug := strings.TrimPrefix(currentBase, "item-")
+	if strings.TrimSpace(baseSlug) == "" {
+		baseSlug = normalizePOSIXSlug(itemName)
+	}
+	itemSlug := baseSlug
+	itemDirName := slugDir("item", itemSlug)
+	destinationDir := filepath.Join(parentDir, itemDirName)
+	for attempt := 2; ; attempt += 1 {
+		if samePath(destinationDir, itemDir) {
+			break
+		}
+		if _, err := os.Stat(destinationDir); os.IsNotExist(err) {
+			break
+		} else if err != nil {
+			return "", "", fmt.Errorf("stat candidate moved project item: %w", err)
+		}
+		itemSlug = fmt.Sprintf("%s-%d", baseSlug, attempt)
+		itemDirName = slugDir("item", itemSlug)
+		destinationDir = filepath.Join(parentDir, itemDirName)
+	}
+	movedProjectionPath := filepath.ToSlash(filepath.Join(parentProjectionPath, itemDirName))
+	if samePath(currentParentDir, parentDir) && currentBase == itemDirName {
+		return itemProjectionPath, itemProjectionPath, nil
+	}
+	if err := os.Rename(itemDir, destinationDir); err != nil {
+		return "", "", fmt.Errorf("move project item: %w", err)
+	}
+	itemPayload["id"] = itemID
+	itemPayload["name"] = itemName
+	itemPayload["slug"] = itemSlug
+	itemPayload["type"] = canonicalItemType
+	if err := writeCBORFile(filepath.Join(destinationDir, posixItemFileName), itemPayload); err != nil {
+		return "", "", fmt.Errorf("write moved project %s: %w", posixItemFileName, err)
+	}
+	return itemProjectionPath, movedProjectionPath, nil
+}

Backend/internal/bootstrap/project_mutations.go

@@ -0,0 +1,491 @@
+// Path: Backend/internal/bootstrap/project_mutations.go
+
+package bootstrap
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+func (service *Service) CreateProjectFolder(ctx context.Context, input CreateProjectFolderInput) (CreateProjectFolderResult, error) {
+	return service.createProjectHierarchyFolder(ctx, input, projectHierarchyRootPath, service.createProjectHierarchyFolderOnDisk)
+}
+
+func (service *Service) CreateProjectTreeFolder(ctx context.Context, input CreateProjectFolderInput) (CreateProjectFolderResult, error) {
+	return service.createProjectHierarchyFolder(ctx, input, projectTreeRootPath, service.createProjectTreeFolderOnDisk)
+}
+
+func (service *Service) DeleteProjectFolder(ctx context.Context, input DeleteProjectFolderInput) (DeleteProjectFolderResult, error) {
+	return service.deleteProjectHierarchyFolder(ctx, input, projectHierarchyRootPath, service.deleteProjectHierarchyFolderOnDisk)
+}
+
+func (service *Service) DeleteProjectTreeFolder(ctx context.Context, input DeleteProjectFolderInput) (DeleteProjectFolderResult, error) {
+	return service.deleteProjectHierarchyFolder(ctx, input, projectTreeRootPath, service.deleteProjectTreeFolderOnDisk)
+}
+
+func (service *Service) RenameProjectFolder(ctx context.Context, input RenameProjectFolderInput) (RenameProjectFolderResult, error) {
+	return service.renameProjectHierarchyFolder(ctx, input, projectHierarchyRootPath, service.renameProjectHierarchyFolderOnDisk)
+}
+
+func (service *Service) RenameProjectTreeFolder(ctx context.Context, input RenameProjectFolderInput) (RenameProjectFolderResult, error) {
+	return service.renameProjectHierarchyFolder(ctx, input, projectTreeRootPath, service.renameProjectTreeFolderOnDisk)
+}
+
+func (service *Service) MoveProjectFolder(ctx context.Context, input MoveProjectFolderInput) (MoveProjectFolderResult, error) {
+	return service.moveProjectHierarchyFolder(ctx, input, projectHierarchyRootPath, service.moveProjectHierarchyFolderOnDisk)
+}
+
+func (service *Service) MoveProjectTreeFolder(ctx context.Context, input MoveProjectFolderInput) (MoveProjectFolderResult, error) {
+	return service.moveProjectHierarchyFolder(ctx, input, projectTreeRootPath, service.moveProjectTreeFolderOnDisk)
+}
+
+func (service *Service) CreateProjectTreeItem(ctx context.Context, input CreateProjectItemInput) (CreateProjectItemResult, error) {
+	return service.createProjectTreeItem(ctx, input, projectTreeRootPath)
+}
+
+func (service *Service) DeleteProjectTreeItem(ctx context.Context, input DeleteProjectItemInput) (DeleteProjectItemResult, error) {
+	return service.deleteProjectTreeItem(ctx, input, projectTreeRootPath)
+}
+
+func (service *Service) MoveProjectTreeItem(ctx context.Context, input MoveProjectItemInput) (MoveProjectItemResult, error) {
+	return service.moveProjectTreeItem(ctx, input, projectTreeRootPath)
+}
+
+func (service *Service) createProjectHierarchyFolder(
+	ctx context.Context,
+	input CreateProjectFolderInput,
+	rootPath func(projectSlug string) string,
+	createOnDisk func(projectSlug, parentFolderPath, name string) (string, string, error),
+) (CreateProjectFolderResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	currentFolders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	parentOrderID := ""
+	trimmedParentFolderPath := strings.TrimSpace(input.ParentFolderPath)
+	if trimmedParentFolderPath != "" {
+		parentFolder, found := findProjectHierarchyFolderByPath(currentFolders, trimmedParentFolderPath)
+		if !found {
+			return CreateProjectFolderResult{}, ErrProjectFolderNotFound
+		}
+		parentOrderID = parentFolder.ID
+	}
+
+	createdPath, _, err := createOnDisk(project.Slug, strings.TrimSpace(input.ParentFolderPath), input.Name)
+	if err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	folders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	createdFolder, ok := findProjectHierarchyFolderByPath(folders, createdPath)
+	if !ok {
+		return CreateProjectFolderResult{}, fmt.Errorf("created project folder missing from projection")
+	}
+
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootPath(project.Slug))
+	seedFolderOrderParent(folderOrder, currentFolders, parentOrderID)
+	insertFolderOrder(folderOrder, parentOrderID, createdFolder.ID, len(folderOrderChildren(folderOrder, parentOrderID)))
+	if err := service.writeProjectFolderOrder(project.Slug, rootPath(project.Slug), folderOrder); err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	folders, err = service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return CreateProjectFolderResult{}, err
+	}
+
+	createdFolder, ok = findProjectHierarchyFolderByPath(folders, createdPath)
+	if !ok {
+		return CreateProjectFolderResult{}, fmt.Errorf("created project folder missing from ordered projection")
+	}
+
+	return CreateProjectFolderResult{ProjectID: project.ID, CreatedFolder: createdFolder, Folders: folders}, nil
+}
+
+func (service *Service) deleteProjectHierarchyFolder(
+	ctx context.Context,
+	input DeleteProjectFolderInput,
+	rootPath func(projectSlug string) string,
+	deleteOnDisk func(projectSlug, folderPath string) (string, error),
+) (DeleteProjectFolderResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	currentFolders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	deletedFolder, found := findProjectHierarchyFolderByPath(currentFolders, strings.TrimSpace(input.FolderPath))
+	if !found {
+		return DeleteProjectFolderResult{}, ErrProjectFolderNotFound
+	}
+
+	deletedFolderPath, err := deleteOnDisk(project.Slug, input.FolderPath)
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	folders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	if _, found := findProjectHierarchyFolderByPath(folders, deletedFolderPath); found {
+		return DeleteProjectFolderResult{}, fmt.Errorf("deleted project folder still present in projection")
+	}
+
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootPath(project.Slug))
+	removeFolderOrder(folderOrder, deletedFolder.ID)
+	if err := service.writeProjectFolderOrder(project.Slug, rootPath(project.Slug), folderOrder); err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	folders, err = service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	return DeleteProjectFolderResult{ProjectID: project.ID, DeletedFolderStableID: deletedFolder.ID, DeletedFolderPath: deletedFolderPath, Folders: folders}, nil
+}
+
+func (service *Service) renameProjectHierarchyFolder(
+	ctx context.Context,
+	input RenameProjectFolderInput,
+	rootPath func(projectSlug string) string,
+	renameOnDisk func(projectSlug, folderPath, name string) (string, string, error),
+) (RenameProjectFolderResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return RenameProjectFolderResult{}, err
+	}
+
+	previousFolderPath, renamedFolderPath, err := renameOnDisk(project.Slug, input.FolderPath, input.Name)
+	if err != nil {
+		return RenameProjectFolderResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return RenameProjectFolderResult{}, err
+	}
+
+	folders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return RenameProjectFolderResult{}, err
+	}
+
+	renamedFolder, found := findProjectHierarchyFolderByPath(folders, renamedFolderPath)
+	if !found {
+		return RenameProjectFolderResult{}, fmt.Errorf("renamed project folder missing from projection")
+	}
+
+	if _, found := findProjectHierarchyFolderByPath(folders, previousFolderPath); found {
+		return RenameProjectFolderResult{}, fmt.Errorf("previous project folder path still present in projection")
+	}
+
+	return RenameProjectFolderResult{ProjectID: project.ID, PreviousFolderStableID: renamedFolder.ID, PreviousFolderPath: previousFolderPath, RenamedFolder: renamedFolder, Folders: folders}, nil
+}
+
+func (service *Service) moveProjectHierarchyFolder(
+	ctx context.Context,
+	input MoveProjectFolderInput,
+	rootPath func(projectSlug string) string,
+	moveOnDisk func(projectSlug, folderPath, parentFolderPath string) (string, string, error),
+) (MoveProjectFolderResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	currentFolders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	currentFolder, found := findProjectHierarchyFolderByPath(currentFolders, strings.TrimSpace(input.FolderPath))
+	if !found {
+		return MoveProjectFolderResult{}, ErrProjectFolderNotFound
+	}
+
+	movedFolderStableID := currentFolder.ID
+	providedFolderStableID := strings.TrimSpace(input.FolderStableID)
+	if providedFolderStableID != "" && providedFolderStableID != movedFolderStableID {
+		return MoveProjectFolderResult{}, ErrInvalidProjectFolderMove
+	}
+
+	parentOrderID := ""
+	trimmedParentFolderPath := strings.TrimSpace(input.ParentFolderPath)
+	providedParentStableID := strings.TrimSpace(input.ParentStableID)
+	if trimmedParentFolderPath != "" {
+		parentFolder, found := findProjectHierarchyFolderByPath(currentFolders, trimmedParentFolderPath)
+		if !found {
+			return MoveProjectFolderResult{}, ErrProjectFolderNotFound
+		}
+		parentOrderID = parentFolder.ID
+		if providedParentStableID != "" && providedParentStableID != parentOrderID {
+			return MoveProjectFolderResult{}, ErrInvalidProjectFolderMove
+		}
+	} else if providedParentStableID != "" {
+		return MoveProjectFolderResult{}, ErrInvalidProjectFolderMove
+	}
+
+	previousFolderPath, movedFolderPath, err := moveOnDisk(project.Slug, input.FolderPath, input.ParentFolderPath)
+	if err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	folders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	movedFolder, found := findProjectHierarchyFolderByPath(folders, movedFolderPath)
+	if !found {
+		return MoveProjectFolderResult{}, fmt.Errorf("moved project folder missing from projection")
+	}
+
+	if previousFolderPath != movedFolderPath {
+		if _, found := findProjectHierarchyFolderByPath(folders, previousFolderPath); found {
+			return MoveProjectFolderResult{}, fmt.Errorf("previous project folder path still present in projection")
+		}
+	}
+
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootPath(project.Slug))
+	seedFolderOrderParent(folderOrder, currentFolders, parentOrderID)
+	removeFolderOrderReference(folderOrder, movedFolderStableID)
+	removeFolderOrderReference(folderOrder, movedFolder.ID)
+	insertFolderOrder(folderOrder, parentOrderID, movedFolder.ID, input.TargetIndex)
+	if err := service.writeProjectFolderOrder(project.Slug, rootPath(project.Slug), folderOrder); err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	folders, err = service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return MoveProjectFolderResult{}, err
+	}
+
+	movedFolder, found = findProjectHierarchyFolderByPath(folders, movedFolderPath)
+	if !found {
+		return MoveProjectFolderResult{}, fmt.Errorf("moved project folder missing from ordered projection")
+	}
+
+	return MoveProjectFolderResult{ProjectID: project.ID, PreviousFolderStableID: movedFolder.ID, PreviousFolderPath: previousFolderPath, MovedFolder: movedFolder, Folders: folders}, nil
+}
+
+func (service *Service) createProjectTreeItem(ctx context.Context, input CreateProjectItemInput, rootPath func(projectSlug string) string) (CreateProjectItemResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	currentNodes, err := service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	parentOrderID := ""
+	trimmedParentFolderPath := strings.TrimSpace(input.ParentFolderPath)
+	if trimmedParentFolderPath != "" {
+		parentFolder, found := findProjectTreeFolderByPath(currentNodes, trimmedParentFolderPath)
+		if !found {
+			return CreateProjectItemResult{}, ErrProjectFolderNotFound
+		}
+		parentOrderID = parentFolder.ID
+	}
+
+	createdPath, err := service.createProjectTreeItemOnDisk(project.Slug, trimmedParentFolderPath, input.Name, input.ItemType)
+	if err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	nodes, err := service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	createdItem, ok := findProjectTreeNodeByPath(nodes, createdPath)
+	if !ok || createdItem.Kind != "item" {
+		return CreateProjectItemResult{}, fmt.Errorf("created project item missing from projection")
+	}
+
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootPath(project.Slug))
+	seedProjectTreeOrderParent(folderOrder, currentNodes, parentOrderID)
+	insertFolderOrder(folderOrder, parentOrderID, createdItem.ID, len(folderOrderChildren(folderOrder, parentOrderID)))
+	if err := service.writeProjectFolderOrder(project.Slug, rootPath(project.Slug), folderOrder); err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	nodes, err = service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return CreateProjectItemResult{}, err
+	}
+
+	createdItem, ok = findProjectTreeNodeByPath(nodes, createdPath)
+	if !ok || createdItem.Kind != "item" {
+		return CreateProjectItemResult{}, fmt.Errorf("created project item missing from ordered projection")
+	}
+
+	return CreateProjectItemResult{ProjectID: project.ID, CreatedItem: createdItem, Nodes: nodes}, nil
+}
+
+func (service *Service) deleteProjectTreeItem(ctx context.Context, input DeleteProjectItemInput, rootPath func(projectSlug string) string) (DeleteProjectItemResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	currentNodes, err := service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	deletedItem, found := findProjectTreeNodeByPath(currentNodes, strings.TrimSpace(input.ItemPath))
+	if !found || deletedItem.Kind != "item" {
+		return DeleteProjectItemResult{}, ErrProjectItemNotFound
+	}
+
+	deletedItemPath, err := service.deleteProjectTreeItemOnDisk(project.Slug, input.ItemPath)
+	if err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	nodes, err := service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	if _, found := findProjectTreeNodeByPath(nodes, deletedItemPath); found {
+		return DeleteProjectItemResult{}, fmt.Errorf("deleted project item still present in projection")
+	}
+
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootPath(project.Slug))
+	removeFolderOrderReference(folderOrder, deletedItem.ID)
+	if err := service.writeProjectFolderOrder(project.Slug, rootPath(project.Slug), folderOrder); err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	nodes, err = service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectItemResult{}, err
+	}
+
+	return DeleteProjectItemResult{ProjectID: project.ID, DeletedItemStableID: deletedItem.ID, DeletedItemPath: deletedItemPath, Nodes: nodes}, nil
+}
+
+func (service *Service) moveProjectTreeItem(ctx context.Context, input MoveProjectItemInput, rootPath func(projectSlug string) string) (MoveProjectItemResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	currentNodes, err := service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	currentItem, found := findProjectTreeNodeByPath(currentNodes, strings.TrimSpace(input.ItemPath))
+	if !found || currentItem.Kind != "item" {
+		return MoveProjectItemResult{}, ErrProjectItemNotFound
+	}
+
+	movedItemStableID := currentItem.ID
+	providedItemStableID := strings.TrimSpace(input.ItemStableID)
+	if providedItemStableID != "" && providedItemStableID != movedItemStableID {
+		return MoveProjectItemResult{}, ErrInvalidProjectItemMove
+	}
+
+	parentOrderID := ""
+	trimmedParentFolderPath := strings.TrimSpace(input.ParentFolderPath)
+	providedParentStableID := strings.TrimSpace(input.ParentStableID)
+	if trimmedParentFolderPath != "" {
+		parentFolder, found := findProjectTreeFolderByPath(currentNodes, trimmedParentFolderPath)
+		if !found {
+			return MoveProjectItemResult{}, ErrProjectFolderNotFound
+		}
+		parentOrderID = parentFolder.ID
+		if providedParentStableID != "" && providedParentStableID != parentOrderID {
+			return MoveProjectItemResult{}, ErrInvalidProjectItemMove
+		}
+	} else if providedParentStableID != "" {
+		return MoveProjectItemResult{}, ErrInvalidProjectItemMove
+	}
+
+	previousItemPath, movedItemPath, err := service.moveProjectTreeItemOnDisk(project.Slug, input.ItemPath, input.ParentFolderPath)
+	if err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	nodes, err := service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	movedItem, found := findProjectTreeNodeByPath(nodes, movedItemPath)
+	if !found || movedItem.Kind != "item" {
+		return MoveProjectItemResult{}, fmt.Errorf("moved project item missing from projection")
+	}
+
+	if previousItemPath != movedItemPath {
+		if _, found := findProjectTreeNodeByPath(nodes, previousItemPath); found {
+			return MoveProjectItemResult{}, fmt.Errorf("previous project item path still present in projection")
+		}
+	}
+
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootPath(project.Slug))
+	seedProjectTreeOrderParent(folderOrder, currentNodes, parentOrderID)
+	removeFolderOrderReference(folderOrder, movedItemStableID)
+	removeFolderOrderReference(folderOrder, movedItem.ID)
+	insertFolderOrder(folderOrder, parentOrderID, movedItem.ID, input.TargetIndex)
+	if err := service.writeProjectFolderOrder(project.Slug, rootPath(project.Slug), folderOrder); err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	nodes, err = service.getProjectTreeNodesByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return MoveProjectItemResult{}, err
+	}
+
+	movedItem, found = findProjectTreeNodeByPath(nodes, movedItemPath)
+	if !found || movedItem.Kind != "item" {
+		return MoveProjectItemResult{}, fmt.Errorf("moved project item missing from ordered projection")
+	}
+
+	return MoveProjectItemResult{ProjectID: project.ID, PreviousItemStableID: movedItem.ID, PreviousItemPath: previousItemPath, MovedItem: movedItem, Nodes: nodes}, nil
+}

Backend/internal/bootstrap/project_order.go

@@ -0,0 +1,471 @@
+// Path: Backend/internal/bootstrap/project_order.go
+
+package bootstrap
+
+import (
+	"fmt"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+func (service *Service) readProjectFolderOrder(projectSlug, rootProjectionPath string) map[string][]string {
+	settingsPath := service.projectSettingsPath(projectSlug)
+	settingsPayload := readStructuredFileMap(settingsPath)
+	folderOrderPayload, _ := settingsPayload["folderOrder"].(map[string]any)
+	if folderOrderPayload == nil {
+		return map[string][]string{}
+	}
+	scopePayload, _ := folderOrderPayload[projectFolderOrderScope(rootProjectionPath)].(map[string]any)
+	if scopePayload == nil {
+		return map[string][]string{}
+	}
+	byParentPayload, _ := scopePayload["byParent"].(map[string]any)
+	if byParentPayload == nil {
+		return map[string][]string{}
+	}
+	order := make(map[string][]string, len(byParentPayload))
+	for key, raw := range byParentPayload {
+		for _, id := range stringSliceValue(raw) {
+			trimmedID := strings.TrimSpace(id)
+			if trimmedID == "" || slicesContains(order[key], trimmedID) {
+				continue
+			}
+			order[key] = append(order[key], trimmedID)
+		}
+	}
+	return order
+}
+
+func (service *Service) writeProjectFolderOrder(projectSlug, rootProjectionPath string, folderOrder map[string][]string) error {
+	settingsPath := service.projectSettingsPath(projectSlug)
+	settingsPayload := readStructuredFileMap(settingsPath)
+	if settingsPayload == nil {
+		settingsPayload = map[string]any{}
+	}
+	folderOrderPayload, _ := settingsPayload["folderOrder"].(map[string]any)
+	if folderOrderPayload == nil {
+		folderOrderPayload = map[string]any{}
+	}
+	scopeKey := projectFolderOrderScope(rootProjectionPath)
+	scopePayload, _ := folderOrderPayload[scopeKey].(map[string]any)
+	if scopePayload == nil {
+		scopePayload = map[string]any{}
+	}
+	byParentPayload := map[string]any{}
+	for key, ids := range folderOrder {
+		if len(ids) == 0 {
+			continue
+		}
+		copied := make([]string, 0, len(ids))
+		for _, id := range ids {
+			trimmedID := strings.TrimSpace(id)
+			if trimmedID == "" || slicesContains(copied, trimmedID) {
+				continue
+			}
+			copied = append(copied, trimmedID)
+		}
+		if len(copied) > 0 {
+			byParentPayload[key] = copied
+		}
+	}
+	scopePayload["byParent"] = byParentPayload
+	folderOrderPayload[scopeKey] = scopePayload
+	settingsPayload["folderOrder"] = folderOrderPayload
+	if err := writeCBORFile(settingsPath, settingsPayload); err != nil {
+		return fmt.Errorf("write project %s: %w", posixSettingsFileName, err)
+	}
+	return nil
+}
+
+func (service *Service) projectSettingsPath(projectSlug string) string {
+	return filepath.Join(strings.TrimSpace(service.posixRoot), "projects", slugDir("project", projectSlug), posixSettingsFileName)
+}
+
+func projectFolderOrderScope(rootProjectionPath string) string {
+	if strings.HasSuffix(rootProjectionPath, "/tree") {
+		return projectFolderOrderTree
+	}
+	return projectFolderOrderHierarchy
+}
+
+func applyProjectHierarchyFolderOrdering(folders []ProjectHierarchyFolderRecord, folderOrder map[string][]string) []ProjectHierarchyFolderRecord {
+	return applyProjectHierarchyFolderOrderingForParent(folders, "", folderOrder)
+}
+
+func applyProjectHierarchyFolderOrderingForParent(folders []ProjectHierarchyFolderRecord, parentID string, folderOrder map[string][]string) []ProjectHierarchyFolderRecord {
+	if len(folders) == 0 {
+		return folders
+	}
+	nextFolders := make([]ProjectHierarchyFolderRecord, len(folders))
+	copy(nextFolders, folders)
+	for index := range nextFolders {
+		nextFolders[index].Children = applyProjectHierarchyFolderOrderingForParent(nextFolders[index].Children, nextFolders[index].ID, folderOrder)
+	}
+	orderIDs := folderOrder[projectFolderOrderParentKey(parentID)]
+	if len(orderIDs) == 0 {
+		return nextFolders
+	}
+	rankByID := make(map[string]int, len(orderIDs))
+	for index, id := range orderIDs {
+		if _, exists := rankByID[id]; !exists {
+			rankByID[id] = index
+		}
+	}
+	sort.SliceStable(nextFolders, func(left, right int) bool {
+		leftRank, leftOrdered := rankByID[nextFolders[left].ID]
+		rightRank, rightOrdered := rankByID[nextFolders[right].ID]
+		if leftOrdered && rightOrdered {
+			return leftRank < rightRank
+		}
+		if leftOrdered != rightOrdered {
+			return leftOrdered
+		}
+		return false
+	})
+	return nextFolders
+}
+
+func removeFolderOrder(folderOrder map[string][]string, folderID string) {
+	removeFolderOrderReference(folderOrder, folderID)
+	trimmedFolderID := strings.TrimSpace(folderID)
+	if trimmedFolderID == "" {
+		return
+	}
+	delete(folderOrder, projectFolderOrderParentKey(trimmedFolderID))
+}
+
+func removeFolderOrderReference(folderOrder map[string][]string, folderID string) {
+	trimmedFolderID := strings.TrimSpace(folderID)
+	if trimmedFolderID == "" {
+		return
+	}
+	for key, ids := range folderOrder {
+		nextIDs := ids[:0]
+		for _, id := range ids {
+			if strings.TrimSpace(id) == trimmedFolderID {
+				continue
+			}
+			nextIDs = append(nextIDs, id)
+		}
+		if len(nextIDs) == 0 {
+			delete(folderOrder, key)
+			continue
+		}
+		folderOrder[key] = append([]string(nil), nextIDs...)
+	}
+}
+
+func insertFolderOrder(folderOrder map[string][]string, parentID, folderID string, index int) {
+	trimmedFolderID := strings.TrimSpace(folderID)
+	if trimmedFolderID == "" {
+		return
+	}
+	removeFolderOrderReference(folderOrder, trimmedFolderID)
+	parentKey := projectFolderOrderParentKey(parentID)
+	children := append([]string(nil), folderOrder[parentKey]...)
+	if index < 0 {
+		index = 0
+	}
+	if index > len(children) {
+		index = len(children)
+	}
+	children = slicesInsert(children, index, trimmedFolderID)
+	folderOrder[parentKey] = children
+}
+
+func seedFolderOrderParent(folderOrder map[string][]string, folders []ProjectHierarchyFolderRecord, parentID string) {
+	children := folders
+	trimmedParentID := strings.TrimSpace(parentID)
+	if trimmedParentID != "" {
+		parent, found := findProjectHierarchyFolder(folders, trimmedParentID)
+		if !found {
+			return
+		}
+		children = parent.Children
+	}
+	parentKey := projectFolderOrderParentKey(trimmedParentID)
+	seeded := make([]string, 0, len(children))
+	for _, child := range children {
+		childID := strings.TrimSpace(child.ID)
+		if childID == "" || slicesContains(seeded, childID) {
+			continue
+		}
+		seeded = append(seeded, childID)
+	}
+	if len(seeded) == 0 {
+		delete(folderOrder, parentKey)
+		return
+	}
+	folderOrder[parentKey] = seeded
+}
+
+func folderOrderChildren(folderOrder map[string][]string, parentID string) []string {
+	return append([]string(nil), folderOrder[projectFolderOrderParentKey(parentID)]...)
+}
+
+func projectFolderOrderParentKey(parentID string) string {
+	trimmedParentID := strings.TrimSpace(parentID)
+	if trimmedParentID == "" {
+		return projectFolderOrderRootKey
+	}
+	return trimmedParentID
+}
+
+func stringSliceValue(value any) []string {
+	items, ok := value.([]any)
+	if !ok {
+		if typed, ok := value.([]string); ok {
+			return typed
+		}
+		return nil
+	}
+	result := make([]string, 0, len(items))
+	for _, item := range items {
+		if text, ok := item.(string); ok {
+			result = append(result, text)
+		}
+	}
+	return result
+}
+
+func slicesContains(values []string, value string) bool {
+	for _, existing := range values {
+		if existing == value {
+			return true
+		}
+	}
+	return false
+}
+
+func slicesInsert(values []string, index int, value string) []string {
+	values = append(values, "")
+	copy(values[index+1:], values[index:])
+	values[index] = value
+	return values
+}
+
+func buildProjectHierarchyFolderTree(rows []projectHierarchyFolderRow, rootParentPath string) []ProjectHierarchyFolderRecord {
+	if len(rows) == 0 {
+		return nil
+	}
+	nodesByPath := make(map[string]*ProjectHierarchyFolderRecord, len(rows))
+	childrenByParent := make(map[string][]string)
+	for _, row := range rows {
+		folderID := strings.TrimSpace(row.ID)
+		if folderID == "" {
+			folderID = row.Path
+		}
+		label := strings.TrimSpace(row.Label)
+		if label == "" {
+			label = fallbackFolderLabel(row.Path)
+		}
+		nodesByPath[row.Path] = &ProjectHierarchyFolderRecord{ID: folderID, Path: row.Path, Label: label, Children: []ProjectHierarchyFolderRecord{}}
+		childrenByParent[row.ParentPath] = append(childrenByParent[row.ParentPath], row.Path)
+	}
+	var build func(parentPath string) []ProjectHierarchyFolderRecord
+	build = func(parentPath string) []ProjectHierarchyFolderRecord {
+		childPaths := childrenByParent[parentPath]
+		if len(childPaths) == 0 {
+			return nil
+		}
+		folders := make([]ProjectHierarchyFolderRecord, 0, len(childPaths))
+		for _, childPath := range childPaths {
+			node := nodesByPath[childPath]
+			if node == nil {
+				continue
+			}
+			folder := ProjectHierarchyFolderRecord{ID: node.ID, Path: node.Path, Label: node.Label, Children: build(filepath.ToSlash(filepath.Join(childPath, "children")))}
+			folders = append(folders, folder)
+		}
+		return folders
+	}
+	return build(rootParentPath)
+}
+
+func buildProjectTreeNodeTree(rows []projectTreeNodeRow, rootParentPath string) []ProjectTreeNodeRecord {
+	if len(rows) == 0 {
+		return nil
+	}
+	nodesByPath := make(map[string]*ProjectTreeNodeRecord, len(rows))
+	childrenByParent := make(map[string][]string)
+	for _, row := range rows {
+		nodeKind := normalizeProjectTreeNodeKind(row.Kind)
+		nodeID := strings.TrimSpace(row.ID)
+		if nodeID == "" {
+			nodeID = row.Path
+		}
+		label := strings.TrimSpace(row.Label)
+		if label == "" {
+			if nodeKind == "item" {
+				label = fallbackItemLabel(row.Path)
+			} else {
+				label = fallbackFolderLabel(row.Path)
+			}
+		}
+		nodesByPath[row.Path] = &ProjectTreeNodeRecord{ID: nodeID, Path: row.Path, Label: label, Kind: nodeKind, ItemType: normalizeProjectTreeItemType(row.ItemType), Children: []ProjectTreeNodeRecord{}}
+		parentKey := normalizeProjectTreeParentPath(nodeKind, row.ParentPath)
+		childrenByParent[parentKey] = append(childrenByParent[parentKey], row.Path)
+	}
+	var build func(parentPath string) []ProjectTreeNodeRecord
+	build = func(parentPath string) []ProjectTreeNodeRecord {
+		childPaths := childrenByParent[parentPath]
+		if len(childPaths) == 0 {
+			return nil
+		}
+		nodes := make([]ProjectTreeNodeRecord, 0, len(childPaths))
+		for _, childPath := range childPaths {
+			node := nodesByPath[childPath]
+			if node == nil {
+				continue
+			}
+			nextNode := ProjectTreeNodeRecord{ID: node.ID, Path: node.Path, Label: node.Label, Kind: node.Kind, ItemType: node.ItemType}
+			if node.Kind == "folder" {
+				nextNode.Children = build(node.Path)
+			}
+			nodes = append(nodes, nextNode)
+		}
+		return nodes
+	}
+	return build(rootParentPath)
+}
+
+func normalizeProjectTreeParentPath(kind, parentPath string) string {
+	if kind == "folder" && strings.HasSuffix(parentPath, "/children") {
+		return filepath.ToSlash(filepath.Dir(parentPath))
+	}
+	return parentPath
+}
+
+func normalizeProjectTreeNodeKind(kind string) string {
+	switch strings.TrimSpace(kind) {
+	case "item":
+		return "item"
+	case "folder", "hierarchy_folder":
+		return "folder"
+	default:
+		return "folder"
+	}
+}
+
+func applyProjectTreeNodeOrdering(nodes []ProjectTreeNodeRecord, folderOrder map[string][]string) []ProjectTreeNodeRecord {
+	return applyProjectTreeNodeOrderingForParent(nodes, "", folderOrder)
+}
+
+func applyProjectTreeNodeOrderingForParent(nodes []ProjectTreeNodeRecord, parentID string, folderOrder map[string][]string) []ProjectTreeNodeRecord {
+	if len(nodes) == 0 {
+		return nodes
+	}
+	nextNodes := make([]ProjectTreeNodeRecord, len(nodes))
+	copy(nextNodes, nodes)
+	for index := range nextNodes {
+		if nextNodes[index].Kind == "folder" {
+			nextNodes[index].Children = applyProjectTreeNodeOrderingForParent(nextNodes[index].Children, nextNodes[index].ID, folderOrder)
+		}
+	}
+	orderIDs := folderOrder[projectFolderOrderParentKey(parentID)]
+	if len(orderIDs) == 0 {
+		return nextNodes
+	}
+	rankByID := make(map[string]int, len(orderIDs))
+	for index, id := range orderIDs {
+		if _, exists := rankByID[id]; !exists {
+			rankByID[id] = index
+		}
+	}
+	sort.SliceStable(nextNodes, func(left, right int) bool {
+		leftRank, leftOrdered := rankByID[nextNodes[left].ID]
+		rightRank, rightOrdered := rankByID[nextNodes[right].ID]
+		if leftOrdered && rightOrdered {
+			return leftRank < rightRank
+		}
+		if leftOrdered != rightOrdered {
+			return leftOrdered
+		}
+		return false
+	})
+	return nextNodes
+}
+
+func findProjectHierarchyFolder(folders []ProjectHierarchyFolderRecord, folderID string) (ProjectHierarchyFolderRecord, bool) {
+	for _, folder := range folders {
+		if folder.ID == folderID {
+			return folder, true
+		}
+		if child, ok := findProjectHierarchyFolder(folder.Children, folderID); ok {
+			return child, true
+		}
+	}
+	return ProjectHierarchyFolderRecord{}, false
+}
+
+func findProjectHierarchyFolderByPath(folders []ProjectHierarchyFolderRecord, folderPath string) (ProjectHierarchyFolderRecord, bool) {
+	for _, folder := range folders {
+		if folder.Path == folderPath {
+			return folder, true
+		}
+		if child, ok := findProjectHierarchyFolderByPath(folder.Children, folderPath); ok {
+			return child, true
+		}
+	}
+	return ProjectHierarchyFolderRecord{}, false
+}
+
+func findProjectTreeNode(nodes []ProjectTreeNodeRecord, nodeID string) (ProjectTreeNodeRecord, bool) {
+	for _, node := range nodes {
+		if node.ID == nodeID {
+			return node, true
+		}
+		if child, ok := findProjectTreeNode(node.Children, nodeID); ok {
+			return child, true
+		}
+	}
+	return ProjectTreeNodeRecord{}, false
+}
+
+func findProjectTreeNodeByPath(nodes []ProjectTreeNodeRecord, nodePath string) (ProjectTreeNodeRecord, bool) {
+	for _, node := range nodes {
+		if node.Path == nodePath {
+			return node, true
+		}
+		if child, ok := findProjectTreeNodeByPath(node.Children, nodePath); ok {
+			return child, true
+		}
+	}
+	return ProjectTreeNodeRecord{}, false
+}
+
+func findProjectTreeFolderByPath(nodes []ProjectTreeNodeRecord, folderPath string) (ProjectTreeNodeRecord, bool) {
+	node, ok := findProjectTreeNodeByPath(nodes, folderPath)
+	if !ok || node.Kind != "folder" {
+		return ProjectTreeNodeRecord{}, false
+	}
+	return node, true
+}
+
+func seedProjectTreeOrderParent(folderOrder map[string][]string, nodes []ProjectTreeNodeRecord, parentID string) {
+	children := nodes
+	trimmedParentID := strings.TrimSpace(parentID)
+	if trimmedParentID != "" {
+		parent, found := findProjectTreeNode(nodes, trimmedParentID)
+		if !found || parent.Kind != "folder" {
+			return
+		}
+		children = parent.Children
+	}
+	parentKey := projectFolderOrderParentKey(parentID)
+	if len(folderOrder[parentKey]) > 0 {
+		return
+	}
+	orderedIDs := make([]string, 0, len(children))
+	for _, child := range children {
+		trimmedChildID := strings.TrimSpace(child.ID)
+		if trimmedChildID == "" || slicesContains(orderedIDs, trimmedChildID) {
+			continue
+		}
+		orderedIDs = append(orderedIDs, trimmedChildID)
+	}
+	if len(orderedIDs) > 0 {
+		folderOrder[parentKey] = orderedIDs
+	}
+}

Backend/internal/bootstrap/project_queries.go

@@ -0,0 +1,346 @@
+// Path: Backend/internal/bootstrap/project_queries.go
+
+package bootstrap
+
+import (
+	"context"
+	"errors"
+
+	"github.com/jackc/pgx/v5"
+)
+
+func (service *Service) loadPrimaryOrganization(ctx context.Context) (*OrganizationRecord, error) {
+	var record OrganizationRecord
+	err := service.db.Pool.QueryRow(ctx, `
+		SELECT id::text, name, slug
+		FROM organizations
+		ORDER BY CASE WHEN slug = $1 THEN 0 ELSE 1 END, created_at ASC
+		LIMIT 1;
+	`, primaryOrganizationSlug).Scan(&record.ID, &record.Name, &record.Slug)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &record, nil
+}
+
+func (service *Service) loadPrimaryDepartment(ctx context.Context) (*DepartmentRecord, error) {
+	var record DepartmentRecord
+	err := service.db.Pool.QueryRow(ctx, `
+		SELECT id::text, organization_id::text, name, slug
+		FROM departments
+		ORDER BY CASE WHEN slug = $1 THEN 0 ELSE 1 END, created_at ASC
+		LIMIT 1;
+	`, primaryDepartmentSlug).Scan(&record.ID, &record.OrganizationID, &record.Name, &record.Slug)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &record, nil
+}
+
+func (service *Service) loadPrimaryTeam(ctx context.Context) (*TeamRecord, error) {
+	var record TeamRecord
+	err := service.db.Pool.QueryRow(ctx, `
+		SELECT id::text, organization_id::text, department_id::text, name, slug
+		FROM teams
+		ORDER BY CASE WHEN slug = $1 THEN 0 ELSE 1 END, created_at ASC
+		LIMIT 1;
+	`, primaryTeamSlug).Scan(&record.ID, &record.OrganizationID, &record.DepartmentID, &record.Name, &record.Slug)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &record, nil
+}
+
+func (service *Service) loadPrimaryProject(ctx context.Context) (*ProjectRecord, error) {
+	var record ProjectRecord
+	err := service.db.Pool.QueryRow(ctx, `
+		SELECT id::text, organization_id::text, department_id::text, team_id::text, name, slug
+		FROM projects
+		ORDER BY CASE WHEN slug = $1 THEN 0 ELSE 1 END, created_at ASC
+		LIMIT 1;
+	`, primaryProjectSlug).Scan(&record.ID, &record.OrganizationID, &record.DepartmentID, &record.TeamID, &record.Name, &record.Slug)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &record, nil
+}
+
+func (service *Service) listOrganizations(ctx context.Context) ([]OrganizationRecord, error) {
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT id::text, name, slug
+		FROM organizations
+		ORDER BY created_at ASC;
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var records []OrganizationRecord
+	for rows.Next() {
+		var record OrganizationRecord
+		if err := rows.Scan(&record.ID, &record.Name, &record.Slug); err != nil {
+			return nil, err
+		}
+
+		records = append(records, record)
+	}
+
+	return records, rows.Err()
+}
+
+func (service *Service) listDepartments(ctx context.Context) ([]DepartmentRecord, error) {
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT id::text, organization_id::text, name, slug
+		FROM departments
+		ORDER BY created_at ASC;
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var records []DepartmentRecord
+	for rows.Next() {
+		var record DepartmentRecord
+		if err := rows.Scan(&record.ID, &record.OrganizationID, &record.Name, &record.Slug); err != nil {
+			return nil, err
+		}
+
+		records = append(records, record)
+	}
+
+	return records, rows.Err()
+}
+
+func (service *Service) listTeams(ctx context.Context) ([]TeamRecord, error) {
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT id::text, organization_id::text, department_id::text, name, slug
+		FROM teams
+		ORDER BY created_at ASC;
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var records []TeamRecord
+	for rows.Next() {
+		var record TeamRecord
+		if err := rows.Scan(&record.ID, &record.OrganizationID, &record.DepartmentID, &record.Name, &record.Slug); err != nil {
+			return nil, err
+		}
+
+		records = append(records, record)
+	}
+
+	return records, rows.Err()
+}
+
+func (service *Service) listProjects(ctx context.Context) ([]ProjectRecord, error) {
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT id::text, organization_id::text, department_id::text, team_id::text, name, slug
+		FROM projects
+		ORDER BY created_at ASC;
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var records []ProjectRecord
+	for rows.Next() {
+		var record ProjectRecord
+		if err := rows.Scan(&record.ID, &record.OrganizationID, &record.DepartmentID, &record.TeamID, &record.Name, &record.Slug); err != nil {
+			return nil, err
+		}
+
+		records = append(records, record)
+	}
+
+	return records, rows.Err()
+}
+
+func (service *Service) loadProjectByID(ctx context.Context, projectID string) (*ProjectRecord, error) {
+	var record ProjectRecord
+	err := service.db.Pool.QueryRow(ctx, `
+		SELECT id::text, organization_id::text, department_id::text, team_id::text, name, slug
+		FROM projects
+		WHERE id = $1::uuid
+		LIMIT 1;
+	`, projectID).Scan(&record.ID, &record.OrganizationID, &record.DepartmentID, &record.TeamID, &record.Name, &record.Slug)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, ErrProjectNotFound
+		}
+
+		return nil, err
+	}
+
+	return &record, nil
+}
+
+func (service *Service) GetProjectHierarchyFolders(ctx context.Context, projectID string) ([]ProjectHierarchyFolderRecord, error) {
+	return service.getProjectHierarchyFoldersByRootPath(ctx, projectID, projectHierarchyRootPath)
+}
+
+func (service *Service) GetProjectTreeFolders(ctx context.Context, projectID string) ([]ProjectHierarchyFolderRecord, error) {
+	return service.getProjectHierarchyFoldersByRootPath(ctx, projectID, projectTreeRootPath)
+}
+
+func (service *Service) GetProjectTreeNodes(ctx context.Context, projectID string) ([]ProjectTreeNodeRecord, error) {
+	return service.getProjectTreeNodesByRootPath(ctx, projectID, projectTreeRootPath)
+}
+
+func (service *Service) getProjectHierarchyFoldersByRootPath(
+	ctx context.Context,
+	projectID string,
+	rootPath func(projectSlug string) string,
+) ([]ProjectHierarchyFolderRecord, error) {
+	project, err := service.loadProjectByID(ctx, projectID)
+	if err != nil {
+		return nil, err
+	}
+
+	rootParentPath := rootPath(project.Slug)
+
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT
+			COALESCE(folder_meta.resource_id, ''),
+			directories.path,
+			COALESCE(directories.parent_path, ''),
+			COALESCE(folder_meta.resource_name, directories.resource_name, '')
+		FROM posix_nodes AS directories
+		LEFT JOIN posix_nodes AS folder_meta
+		  ON folder_meta.path = directories.path || '/folder.cbor'
+		 AND folder_meta.node_kind = 'file'::posix_node_kind
+		WHERE directories.node_kind = 'directory'::posix_node_kind
+		  AND directories.logical_type = 'hierarchy_folder'
+		  AND directories.project_slug = $1
+		  AND directories.path LIKE $2
+		ORDER BY directories.depth ASC, directories.path ASC;
+	`, project.Slug, rootParentPath+"/%")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var folderRows []projectHierarchyFolderRow
+	for rows.Next() {
+		var row projectHierarchyFolderRow
+		if err := rows.Scan(&row.ID, &row.Path, &row.ParentPath, &row.Label); err != nil {
+			return nil, err
+		}
+		folderRows = append(folderRows, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	folders := buildProjectHierarchyFolderTree(folderRows, rootParentPath)
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootParentPath)
+
+	return applyProjectHierarchyFolderOrdering(folders, folderOrder), nil
+}
+
+func (service *Service) getProjectTreeNodesByRootPath(
+	ctx context.Context,
+	projectID string,
+	rootPath func(projectSlug string) string,
+) ([]ProjectTreeNodeRecord, error) {
+	project, err := service.loadProjectByID(ctx, projectID)
+	if err != nil {
+		return nil, err
+	}
+
+	rootParentPath := rootPath(project.Slug)
+
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT
+			COALESCE(node_meta.resource_id, ''),
+			directories.path,
+			COALESCE(directories.parent_path, ''),
+			COALESCE(node_meta.resource_name, directories.resource_name, ''),
+			directories.logical_type,
+			COALESCE(node_meta.content_json->>'type', directories.content_json->>'type', '')
+		FROM posix_nodes AS directories
+		LEFT JOIN posix_nodes AS node_meta
+		  ON node_meta.node_kind = 'file'::posix_node_kind
+		 AND (
+				(directories.logical_type = 'hierarchy_folder' AND node_meta.path = directories.path || '/folder.cbor')
+				OR (directories.logical_type = 'item' AND node_meta.path = directories.path || '/item.cbor')
+		 )
+		WHERE directories.node_kind = 'directory'::posix_node_kind
+		  AND directories.logical_type IN ('hierarchy_folder', 'item')
+		  AND directories.project_slug = $1
+		  AND directories.path LIKE $2
+		ORDER BY directories.depth ASC, directories.path ASC;
+	`, project.Slug, rootParentPath+"/%")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var nodeRows []projectTreeNodeRow
+	for rows.Next() {
+		var row projectTreeNodeRow
+		if err := rows.Scan(&row.ID, &row.Path, &row.ParentPath, &row.Label, &row.Kind, &row.ItemType); err != nil {
+			return nil, err
+		}
+		nodeRows = append(nodeRows, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	nodes := buildProjectTreeNodeTree(nodeRows, rootParentPath)
+	folderOrder := service.readProjectFolderOrder(project.Slug, rootParentPath)
+
+	return applyProjectTreeNodeOrdering(nodes, folderOrder), nil
+}
+
+func (service *Service) listWorkspaces(ctx context.Context) ([]WorkspaceRecord, error) {
+	rows, err := service.db.Pool.Query(ctx, `
+		SELECT id::text, organization_id::text, name, slug, kind::text, department_id::text, team_id::text, project_id::text
+		FROM workspaces
+		ORDER BY created_at ASC;
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var records []WorkspaceRecord
+	for rows.Next() {
+		var record WorkspaceRecord
+		if err := rows.Scan(&record.ID, &record.OrganizationID, &record.Name, &record.Slug, &record.Kind, &record.DepartmentID, &record.TeamID, &record.ProjectID); err != nil {
+			return nil, err
+		}
+
+		records = append(records, record)
+	}
+
+	return records, rows.Err()
+}

Backend/internal/bootstrap/service_test.go

@@ -7,6 +7,9 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/tailscale/hujson"
 )
 
 type fakeRow struct {
@@ -104,25 +107,28 @@ func TestEnsureBootstrapPOSIXSkeletonInitializesEmptyRoot(t *testing.T) {
 	}
 
 	requiredPaths := []string{
-		filepath.Join(rootPath, "settings.json"),
-		filepath.Join(rootPath, "layout.json"),
+		filepath.Join(rootPath, posixSettingsFileName),
+		filepath.Join(rootPath, posixLayoutFileName),
 		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, "catalog", "packs", "pack-core", posixManifestFileName),
+		filepath.Join(rootPath, "catalog", "packs", "pack-core", "entries", "app-shell", posixManifestFileName),
+		filepath.Join(rootPath, "catalog", "standalone", "app-shell", posixManifestFileName),
+		filepath.Join(rootPath, "departments", "department-primary-department", posixSettingsFileName),
+		filepath.Join(rootPath, "departments", "department-primary-department", posixUsersFileName),
+		filepath.Join(rootPath, "departments", "department-primary-department", "teams", "team-primary-team", posixSettingsFileName),
+		filepath.Join(rootPath, "departments", "department-primary-department", "teams", "team-primary-team", posixUsersFileName),
+		filepath.Join(rootPath, "projects", "project-primary-project", posixSettingsFileName),
+		filepath.Join(rootPath, "projects", "project-primary-project", posixHomeFileName),
+		filepath.Join(rootPath, "projects", "project-primary-project", posixACLFileName),
 		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", posixSettingsFileName),
+		filepath.Join(rootPath, "users", posixDataFileName),
 		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", posixSettingsFileName),
+		filepath.Join(rootPath, "users", "personals", "personal-ronald", posixLayoutFileName),
+		filepath.Join(rootPath, "users", "personals", "personal-ronald", posixHomeFileName),
 		filepath.Join(rootPath, "users", "personals", "personal-ronald", "tree"),
 	}
 
@@ -132,10 +138,10 @@ func TestEnsureBootstrapPOSIXSkeletonInitializesEmptyRoot(t *testing.T) {
 		}
 	}
 
-	settingsPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "settings.json"))
+	settingsPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, posixSettingsFileName))
 	installationPayload, ok := settingsPayload["installation"].(map[string]any)
 	if !ok {
-		t.Fatalf("settings.json missing installation object: %#v", settingsPayload)
+		t.Fatalf("%s missing installation object: %#v", posixSettingsFileName, settingsPayload)
 	}
 	if installationPayload["name"] != "MangoPig" {
 		t.Fatalf("expected installation name MangoPig, got %#v", installationPayload["name"])
@@ -144,31 +150,53 @@ func TestEnsureBootstrapPOSIXSkeletonInitializesEmptyRoot(t *testing.T) {
 		t.Fatalf("expected installation to be bootstrapped, got %#v", installationPayload["isBootstrapped"])
 	}
 
-	layoutPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "layout.json"))
+	layoutPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, posixLayoutFileName))
 	homePayload, ok := layoutPayload["home"].(map[string]any)
 	if !ok {
-		t.Fatalf("layout.json missing home object: %#v", layoutPayload)
+		t.Fatalf("%s missing home object: %#v", posixLayoutFileName, 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"))
+	packManifest := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "catalog", "packs", "pack-core", posixManifestFileName))
+	if packManifest["type"] != "pack" {
+		t.Fatalf("expected pack manifest type pack, got %#v", packManifest["type"])
+	}
+	if packManifest["slug"] != "core" {
+		t.Fatalf("expected pack manifest slug core, got %#v", packManifest["slug"])
+	}
+
+	entryManifest := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "catalog", "packs", "pack-core", "entries", "app-shell", posixManifestFileName))
+	runtimePayload, ok := entryManifest["runtime"].(map[string]any)
+	if !ok {
+		t.Fatalf("%s missing runtime object: %#v", posixManifestFileName, entryManifest)
+	}
+	if runtimePayload["path"] != "/v1/app-shell" {
+		t.Fatalf("expected app-shell runtime path /v1/app-shell, got %#v", runtimePayload["path"])
+	}
+
+	standaloneManifest := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "catalog", "standalone", "app-shell", posixManifestFileName))
+	if standaloneManifest["source"] != "standalone" {
+		t.Fatalf("expected standalone manifest source standalone, got %#v", standaloneManifest["source"])
+	}
+
+	projectSettings := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "projects", "project-primary-project", posixSettingsFileName))
 	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"))
+	projectACL := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "projects", "project-primary-project", posixACLFileName))
 	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"))
+	usersSettings := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "users", posixSettingsFileName))
 	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"))
+	personalSettings := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "users", "personals", "personal-ronald", posixSettingsFileName))
 	if personalSettings["type"] != "personal" {
 		t.Fatalf("expected personal settings type personal, got %#v", personalSettings["type"])
 	}
@@ -178,8 +206,15 @@ func TestEnsureBootstrapPOSIXSkeletonInitializesEmptyRoot(t *testing.T) {
 	if personalSettings["slug"] != "ronald" {
 		t.Fatalf("expected personal slug ronald, got %#v", personalSettings["slug"])
 	}
+	personalTheme, ok := personalSettings["theme"].(map[string]any)
+	if !ok {
+		t.Fatalf("expected personal settings to contain theme object, got %#v", personalSettings)
+	}
+	if personalTheme["presetId"] != defaultThemePresetID {
+		t.Fatalf("expected personal theme preset %s, got %#v", defaultThemePresetID, personalTheme["presetId"])
+	}
 
-	personalHome := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, "users", "personals", "personal-ronald", "home.json"))
+	personalHome := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, "users", "personals", "personal-ronald", posixHomeFileName))
 	if personalHome["type"] != "personal-home" {
 		t.Fatalf("expected personal home type personal-home, got %#v", personalHome["type"])
 	}
@@ -217,8 +252,8 @@ func TestCreateProjectHierarchyFolderOnDiskCreatesExpectedFolderShape(t *testing
 
 	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, posixFolderFileName),
+		filepath.Join(createdFolderPath, posixACLFileName),
 		filepath.Join(createdFolderPath, "children"),
 	} {
 		if _, err := os.Stat(path); err != nil {
@@ -226,7 +261,7 @@ func TestCreateProjectHierarchyFolderOnDiskCreatesExpectedFolderShape(t *testing
 		}
 	}
 
-	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(createdFolderPath, "folder.json"))
+	folderPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(createdFolderPath, posixFolderFileName))
 	if strings.TrimSpace(asStringForTest(folderPayload["id"])) == "" {
 		t.Fatalf("expected created folder to have stable id, got %#v", folderPayload["id"])
 	}
@@ -249,6 +284,39 @@ func TestCreateProjectHierarchyFolderOnDiskCreatesExpectedFolderShape(t *testing
 	}
 }
 
+func TestPersonalSettingsPathForDisplayName(t *testing.T) {
+	path := personalSettingsPathForDisplayName(" Ronald ")
+	if path != "users/personals/personal-ronald/settings.cbor" {
+		t.Fatalf("unexpected personal settings path: %s", path)
+	}
+}
+
+func TestApplyThemePresetToSettingsPreservesExistingFields(t *testing.T) {
+	settings := map[string]any{
+		"type": "personal",
+		"slug": "ronald",
+		"theme": map[string]any{
+			"density": "comfortable",
+		},
+	}
+
+	updated := applyThemePresetToSettings(settings, "moku-default")
+
+	if updated["type"] != "personal" {
+		t.Fatalf("expected type personal, got %#v", updated["type"])
+	}
+	theme, ok := updated["theme"].(map[string]any)
+	if !ok {
+		t.Fatalf("expected theme object, got %#v", updated["theme"])
+	}
+	if theme["presetId"] != "moku-default" {
+		t.Fatalf("expected presetId moku-default, got %#v", theme["presetId"])
+	}
+	if theme["density"] != "comfortable" {
+		t.Fatalf("expected density to be preserved, got %#v", theme["density"])
+	}
+}
+
 func TestCreateProjectTreeFolderOnDiskCreatesExpectedFolderShape(t *testing.T) {
 	rootPath := filepath.Join(t.TempDir(), "POSIX")
 	service := NewService(nil, rootPath)
@@ -278,8 +346,8 @@ func TestCreateProjectTreeFolderOnDiskCreatesExpectedFolderShape(t *testing.T) {
 
 	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, posixFolderFileName),
+		filepath.Join(createdFolderPath, posixACLFileName),
 		filepath.Join(createdFolderPath, "children"),
 	} {
 		if _, err := os.Stat(path); err != nil {
@@ -345,7 +413,7 @@ func TestRenameProjectHierarchyFolderOnDiskRenamesFolderShape(t *testing.T) {
 		t.Fatalf("expected nested child folder to move with renamed parent: %v", err)
 	}
 
-	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(renamedFolderPath, "folder.json"))
+	folderPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(renamedFolderPath, posixFolderFileName))
 	if strings.TrimSpace(asStringForTest(folderPayload["id"])) == "" {
 		t.Fatalf("expected renamed folder to preserve stable id, got %#v", folderPayload["id"])
 	}
@@ -392,7 +460,7 @@ func TestRenameProjectTreeFolderOnDiskRenamesFolderShape(t *testing.T) {
 		t.Fatalf("unexpected renamed path: %s", renamedPath)
 	}
 
-	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, filepath.FromSlash(renamedPath), "folder.json"))
+	folderPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, filepath.FromSlash(renamedPath), posixFolderFileName))
 	if folderPayload["name"] != "Specifications" {
 		t.Fatalf("expected renamed folder name Specifications, got %#v", folderPayload["name"])
 	}
@@ -454,7 +522,7 @@ func TestMoveProjectHierarchyFolderOnDiskMovesFolderToNewParent(t *testing.T) {
 		t.Fatalf("expected nested child folder to move with moved parent: %v", err)
 	}
 
-	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(movedFolderPath, "folder.json"))
+	folderPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(movedFolderPath, posixFolderFileName))
 	if strings.TrimSpace(asStringForTest(folderPayload["id"])) == "" {
 		t.Fatalf("expected moved folder to preserve stable id, got %#v", folderPayload["id"])
 	}
@@ -505,7 +573,7 @@ func TestMoveProjectTreeFolderOnDiskMovesFolderToNewParent(t *testing.T) {
 		t.Fatalf("unexpected moved path: %s", movedPath)
 	}
 
-	folderPayload := readJSONFileForTest[map[string]any](t, filepath.Join(rootPath, filepath.FromSlash(movedPath), "folder.json"))
+	folderPayload := readStructuredFileForTest[map[string]any](t, filepath.Join(rootPath, filepath.FromSlash(movedPath), posixFolderFileName))
 	if folderPayload["name"] != "Docs" {
 		t.Fatalf("expected moved folder name Docs, got %#v", folderPayload["name"])
 	}
@@ -622,7 +690,7 @@ func asStringForTest(value any) string {
 	return text
 }
 
-func readJSONFileForTest[T any](t *testing.T, path string) T {
+func readStructuredFileForTest[T any](t *testing.T, path string) T {
 	t.Helper()
 
 	data, err := os.ReadFile(path)
@@ -630,9 +698,37 @@ func readJSONFileForTest[T any](t *testing.T, path string) T {
 		t.Fatalf("read %s: %v", path, err)
 	}
 
+	var raw any
+	switch strings.ToLower(filepath.Ext(path)) {
+	case ".cbor":
+		if err := cbor.Unmarshal(data, &raw); err != nil {
+			t.Fatalf("unmarshal %s: %v", path, err)
+		}
+	case ".json":
+		if err := json.Unmarshal(data, &raw); err != nil {
+			t.Fatalf("unmarshal %s: %v", path, err)
+		}
+	case ".jsonc":
+		ast, err := hujson.Parse(data)
+		if err != nil {
+			t.Fatalf("parse jsonc %s: %v", path, err)
+		}
+		ast.Standardize()
+		if err := json.Unmarshal(ast.Pack(), &raw); err != nil {
+			t.Fatalf("unmarshal standardized %s: %v", path, err)
+		}
+	default:
+		t.Fatalf("unsupported structured test file %s", path)
+	}
+
+	normalizedBytes, err := json.Marshal(normalizeStructuredValue(raw))
+	if err != nil {
+		t.Fatalf("normalize %s: %v", path, err)
+	}
+
 	var payload T
-	if err := json.Unmarshal(data, &payload); err != nil {
-		t.Fatalf("unmarshal %s: %v", path, err)
+	if err := json.Unmarshal(normalizedBytes, &payload); err != nil {
+		t.Fatalf("decode normalized %s: %v", path, err)
 	}
 
 	return payload

Backend/internal/bootstrap/settings_theme.go

@@ -0,0 +1,111 @@
+package bootstrap
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"github.com/jackc/pgx/v5"
+)
+
+const defaultThemePresetID = "moku-midnight"
+
+func personalSettingsPathForDisplayName(displayName string) string {
+	personalName := strings.TrimSpace(displayName)
+	if personalName == "" {
+		personalName = defaultPersonalDisplayName
+	}
+
+	personalSlug := normalizePOSIXSlug(personalName)
+	return filepath.ToSlash(filepath.Join("users", "personals", slugDir("personal", personalSlug), posixSettingsFileName))
+}
+
+func extractThemePresetID(settings map[string]any) string {
+	theme, ok := settings["theme"].(map[string]any)
+	if !ok {
+		return ""
+	}
+
+	presetID, _ := theme["presetId"].(string)
+	return strings.TrimSpace(presetID)
+}
+
+func applyThemePresetToSettings(settings map[string]any, presetID string) map[string]any {
+	normalized := settings
+	if normalized == nil {
+		normalized = map[string]any{}
+	}
+
+	theme, ok := normalized["theme"].(map[string]any)
+	if !ok || theme == nil {
+		theme = map[string]any{}
+	}
+
+	theme["presetId"] = presetID
+	normalized["theme"] = theme
+	return normalized
+}
+
+func (service *Service) SaveThemePreset(ctx context.Context, input SaveThemePresetInput) (*AdminRecord, error) {
+	admin, err := service.GetAdmin(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if admin == nil {
+		return nil, ErrAdminNotConfigured
+	}
+
+	presetID := strings.TrimSpace(input.PresetID)
+	if presetID == "" {
+		return nil, fmt.Errorf("theme preset id is required")
+	}
+
+	rootPath := strings.TrimSpace(service.posixRoot)
+	if rootPath == "" {
+		return nil, fmt.Errorf("posix root is not configured")
+	}
+
+	relativeSettingsPath := personalSettingsPathForDisplayName(admin.DisplayName)
+	absoluteSettingsPath := filepath.Join(rootPath, filepath.FromSlash(relativeSettingsPath))
+	settings := readStructuredFileMap(absoluteSettingsPath)
+	if len(settings) == 0 {
+		return nil, fmt.Errorf("personal settings file is missing")
+	}
+
+	updatedSettings := applyThemePresetToSettings(settings, presetID)
+	if err := writeCBORFile(absoluteSettingsPath, updatedSettings); err != nil {
+		return nil, fmt.Errorf("write personal %s: %w", posixSettingsFileName, err)
+	}
+
+	if err := service.rebuildProjection(ctx); err != nil {
+		return nil, err
+	}
+
+	return service.GetAdmin(ctx)
+}
+
+func (service *Service) loadAdminThemePresetID(ctx context.Context, displayName string) (string, error) {
+	path := personalSettingsPathForDisplayName(displayName)
+
+	var presetID *string
+	err := service.db.Pool.QueryRow(ctx, `
+		SELECT content_json->'theme'->>'presetId'
+		FROM posix_nodes
+		WHERE path = $1
+		LIMIT 1;
+	`, path).Scan(&presetID)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return "", nil
+		}
+		return "", err
+	}
+
+	if presetID == nil {
+		return "", nil
+	}
+
+	return strings.TrimSpace(*presetID), nil
+}

Backend/internal/httpx/api_project_decode.go

@@ -0,0 +1,127 @@
+// Path: Backend/internal/httpx/api_project_decode.go
+
+package httpx
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+	"strings"
+)
+
+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 decodeMoveProjectFolderRequest(w http.ResponseWriter, r *http.Request) (moveProjectFolderRequest, bool) {
+	var payload moveProjectFolderRequest
+	if !decodeJSONObjectBody(w, r, &payload) {
+		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
+	if !decodeJSONObjectBody(w, r, &payload) {
+		return payload, false
+	}
+	return payload, true
+}
+
+func decodeProjectFolderRequest(w http.ResponseWriter, r *http.Request) (createProjectFolderRequest, bool) {
+	var payload createProjectFolderRequest
+	if !decodeJSONObjectBody(w, r, &payload) {
+		return payload, false
+	}
+	return payload, true
+}
+
+func decodeProjectItemRequest(w http.ResponseWriter, r *http.Request) (createProjectItemRequest, bool) {
+	var payload createProjectItemRequest
+	if !decodeJSONObjectBody(w, r, &payload) {
+		return payload, false
+	}
+	return payload, true
+}
+
+func decodeMoveProjectItemRequest(w http.ResponseWriter, r *http.Request) (moveProjectItemRequest, bool) {
+	var payload moveProjectItemRequest
+	if !decodeJSONObjectBody(w, r, &payload) {
+		return payload, false
+	}
+	return payload, true
+}
+
+func decodeJSONObjectBody(w http.ResponseWriter, r *http.Request, target any) bool {
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	if err := decoder.Decode(target); 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 false
+		}
+
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_json", "The request body must be valid JSON.")
+		return 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 false
+	}
+
+	return true
+}

Backend/internal/httpx/api_project_errors.go

@@ -0,0 +1,42 @@
+// Path: Backend/internal/httpx/api_project_errors.go
+
+package httpx
+
+import (
+	"errors"
+	"net/http"
+
+	bootstrapservice "moku-backend/internal/bootstrap"
+)
+
+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)
+	}
+}

Backend/internal/httpx/api_project_routes.go

@@ -1,9 +1,8 @@
+// Path: Backend/internal/httpx/api_project_routes.go
+
 package httpx
 
 import (
-	"encoding/json"
-	"errors"
-	"io"
 	"net/http"
 	"strings"
 
@@ -12,48 +11,6 @@ import (
 	"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 == "" {
@@ -551,167 +508,3 @@ func (routes apiRoutes) handleMoveProjectTreeItem(w http.ResponseWriter, r *http
 		},
 	})
 }
-
-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

@@ -31,6 +31,7 @@ func (routes apiRoutes) Register(router chi.Router) {
 			bootstrapRouter.Post("/structure", routes.handleBootstrapStructureStep)
 		})
 		apiRouter.Get("/app-shell", routes.handleAppShellState)
+		apiRouter.Put("/settings/theme", routes.handleSaveThemePreset)
 		apiRouter.Get("/organizations", routes.handleOrganizations)
 		apiRouter.Get("/workspaces", routes.handleWorkspaces)
 		apiRouter.Route("/projects/{projectId}", func(projectRouter chi.Router) {

Backend/internal/httpx/api_settings_routes.go

@@ -0,0 +1,43 @@
+package httpx
+
+import (
+	"net/http"
+	"strings"
+
+	bootstrapservice "moku-backend/internal/bootstrap"
+)
+
+type saveThemePresetRequest struct {
+	PresetID string `json:"presetId"`
+}
+
+func (routes apiRoutes) handleSaveThemePreset(w http.ResponseWriter, r *http.Request) {
+	payload, ok := decodeBootstrapRequest[saveThemePresetRequest](w, r)
+	if !ok {
+		return
+	}
+
+	payload.PresetID = strings.TrimSpace(payload.PresetID)
+	if payload.PresetID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Theme preset ID is required.")
+		return
+	}
+
+	admin, err := routes.bootstrapService().SaveThemePreset(r.Context(), bootstrapservice.SaveThemePresetInput{
+		PresetID: payload.PresetID,
+	})
+	if err != nil {
+		routes.writeBootstrapPersistenceError(w, r, err)
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": map[string]any{
+			"presetId": payload.PresetID,
+			"admin":    admin,
+		},
+		"meta": map[string]any{
+			"resource": "settings-theme",
+		},
+	})
+}

Backend/internal/jobs/store.go

@@ -1,3 +1,5 @@
+// Path: Backend/internal/jobs/store.go
+
 package jobs
 
 import (

Backend/internal/posixproj/projector.go

@@ -1,72 +1,15 @@
+// Path: Backend/internal/posixproj/projector.go
+
 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)}
 }
@@ -145,9 +88,9 @@ func (projector *Projector) RebuildWithSummary(ctx context.Context) (RebuildSumm
 			node.TeamSlug,
 			node.ProjectSlug,
 			node.PersonalSlug,
-				node.ContentJSON,
-				node.SizeBytes,
-				node.Checksum,
+			node.ContentJSON,
+			node.SizeBytes,
+			node.Checksum,
 		); err != nil {
 			return RebuildSummary{}, fmt.Errorf("insert posix node %s: %w", node.Path, err)
 		}
@@ -159,395 +102,3 @@ func (projector *Projector) RebuildWithSummary(ctx context.Context) (RebuildSumm
 
 	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_classify.go

@@ -0,0 +1,227 @@
+// Path: Backend/internal/posixproj/projector_classify.go
+
+package posixproj
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+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]
+	ext := strings.ToLower(filepath.Ext(name))
+	structuredRole := strings.TrimSuffix(name, filepath.Ext(name))
+	if !isDir {
+		fileRole = structuredRole
+	}
+
+	hasChildrenAncestor := pathContainsSegment(parts, "children")
+	hasTreeAncestor := pathContainsSegment(parts, "tree")
+	parentName := ""
+	if len(parts) >= 2 {
+		parentName = parts[len(parts)-2]
+	}
+
+	switch {
+	case !isDir && structuredRole == "settings" && len(parts) == 1 && ext == ".cbor":
+		return "tenant", "settings"
+	case !isDir && structuredRole == "layout" && len(parts) == 1 && ext == ".cbor":
+		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 ""
+}

Backend/internal/posixproj/projector_scan.go

@@ -0,0 +1,277 @@
+// Path: Backend/internal/posixproj/projector_scan.go
+
+package posixproj
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/tailscale/hujson"
+)
+
+const (
+	settingsCBORPath = "settings.cbor"
+)
+
+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, settingsCBORPath)
+	content, err := os.ReadFile(settingsPath)
+	if err != nil {
+		if errorsIsNotExist(err) {
+			return Scope{}, nil
+		}
+		return Scope{}, fmt.Errorf("read root %s: %w", filepath.Base(settingsPath), err)
+	}
+
+	payload, err := decodeStructuredMap(settingsPath, content)
+	if err != nil {
+		return Scope{}, fmt.Errorf("decode root %s: %w", filepath.Base(settingsPath), err)
+	}
+	if len(payload) == 0 {
+		return Scope{}, nil
+	}
+
+	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 isStructuredProjectionFile(entry.Name()) {
+		payload, err := decodeStructuredMap(absPath, content)
+		if 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 isStructuredProjectionFile(name string) bool {
+	switch strings.ToLower(filepath.Ext(name)) {
+	case ".json", ".jsonc", ".cbor":
+		return true
+	default:
+		return false
+	}
+}
+
+func decodeStructuredMap(path string, content []byte) (map[string]any, error) {
+	var payload any
+	switch strings.ToLower(filepath.Ext(path)) {
+	case ".cbor":
+		if err := cbor.Unmarshal(content, &payload); err != nil {
+			return nil, err
+		}
+	case ".json":
+		if err := json.Unmarshal(content, &payload); err != nil {
+			return nil, err
+		}
+	case ".jsonc":
+		decoded, err := decodeJSONCToAny(content)
+		if err != nil {
+			return nil, err
+		}
+		payload = decoded
+	default:
+		return nil, fmt.Errorf("unsupported structured file extension %q", filepath.Ext(path))
+	}
+	if payload == nil {
+		return map[string]any{}, nil
+	}
+	normalized, ok := normalizeStructuredValue(payload).(map[string]any)
+	if !ok || normalized == nil {
+		return map[string]any{}, nil
+	}
+	return normalized, nil
+}
+
+func decodeJSONCToAny(content []byte) (any, error) {
+	ast, err := hujson.Parse(content)
+	if err != nil {
+		return nil, err
+	}
+	ast.Standardize()
+	standardized := ast.Pack()
+	var payload any
+	if err := json.Unmarshal(standardized, &payload); err != nil {
+		return nil, err
+	}
+	return payload, nil
+}
+
+func normalizeStructuredValue(value any) any {
+	switch typed := value.(type) {
+	case map[string]any:
+		normalized := make(map[string]any, len(typed))
+		for key, child := range typed {
+			normalized[key] = normalizeStructuredValue(child)
+		}
+		return normalized
+	case map[any]any:
+		normalized := make(map[string]any, len(typed))
+		for key, child := range typed {
+			normalized[fmt.Sprint(key)] = normalizeStructuredValue(child)
+		}
+		return normalized
+	case []any:
+		normalized := make([]any, len(typed))
+		for index, child := range typed {
+			normalized[index] = normalizeStructuredValue(child)
+		}
+		return normalized
+	default:
+		return value
+	}
+}
+
+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

@@ -1,3 +1,5 @@
+// Path: Backend/internal/posixproj/projector_test.go
+
 package posixproj
 
 import (
@@ -5,6 +7,21 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/fxamacker/cbor/v2"
+)
+
+const (
+	testSettingsFileName = "settings.cbor"
+	testLayoutFileName   = "layout.cbor"
+	testHomeFileName     = "home.cbor"
+	testUsersFileName    = "users.cbor"
+	testACLFileName      = "acl.cbor"
+	testFolderFileName   = "folder.cbor"
+	testItemFileName     = "item.cbor"
+	testDataFileName     = "data.cbor"
+	testSchemaFileName   = "schema.json"
+	testManifestFileName = "manifest.jsonc"
 )
 
 func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
@@ -12,6 +29,8 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 
 	mustMkdirAll(t, filepath.Join(root, "catalog", "packs"))
 	mustMkdirAll(t, filepath.Join(root, "catalog", "standalone"))
+	mustMkdirAll(t, filepath.Join(root, "catalog", "packs", "pack-core", "entries", "app-shell"))
+	mustMkdirAll(t, filepath.Join(root, "catalog", "standalone", "app-shell"))
 	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"))
@@ -20,7 +39,7 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 	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{
+	mustWriteStructured(t, filepath.Join(root, testSettingsFileName), map[string]any{
 		"installation": map[string]any{
 			"id":             "installation-1",
 			"name":           "MangoPig",
@@ -32,81 +51,103 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 			"slug": "primary-organization",
 		},
 	})
-	mustWriteJSON(t, filepath.Join(root, "layout.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, testLayoutFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "catalog", "packs", "pack-core", testManifestFileName), map[string]any{
+		"id":      "pack-core",
+		"slug":    "core",
+		"type":    "pack",
+		"name":    "Core Pack",
+		"entries": []map[string]any{{"slug": "app-shell", "path": "entries/app-shell"}},
+	})
+	mustWriteStructured(t, filepath.Join(root, "catalog", "packs", "pack-core", "entries", "app-shell", testManifestFileName), map[string]any{
+		"id":   "app-shell",
+		"slug": "app-shell",
+		"type": "app",
+		"runtime": map[string]any{
+			"kind": "route",
+			"path": "/v1/app-shell",
+		},
+	})
+	mustWriteStructured(t, filepath.Join(root, "catalog", "standalone", "app-shell", testManifestFileName), map[string]any{
+		"id":     "app-shell",
+		"slug":   "app-shell",
+		"type":   "app",
+		"source": "standalone",
+	})
+	mustWriteStructured(t, filepath.Join(root, "departments", "department-primary-department", testSettingsFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "departments", "department-primary-department", testUsersFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "departments", "department-primary-department", "teams", "team-primary-team", testSettingsFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", testSettingsFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", testHomeFileName), map[string]any{
 		"type":    "project-home",
 		"project": "primary-project",
 	})
-	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "acl.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", testACLFileName), map[string]any{
 		"inherits": true,
 		"rules":    []any{},
 	})
-	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "folder.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", testFolderFileName), map[string]any{
 		"name": "Design",
 		"slug": "design",
 	})
-	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "acl.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", testACLFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", testSettingsFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", testHomeFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "children", "folder-design", "children", "project-web", testACLFileName), map[string]any{
 		"inherits": true,
 		"rules":    []any{},
 	})
-	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "folder.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", testFolderFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", testItemFileName), 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{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", testSchemaFileName), map[string]any{
 		"type": "object",
 	})
-	mustWriteJSON(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", "data.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", testDataFileName), map[string]any{
 		"title": "Roadmap",
 	})
-	mustWriteJSON(t, filepath.Join(root, "users", "settings.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "users", testSettingsFileName), map[string]any{
 		"primaryAdminId": "admin-1",
 	})
-	mustWriteJSON(t, filepath.Join(root, "users", "data.json"), map[string]any{
+	mustWriteStructured(t, filepath.Join(root, "users", testDataFileName), map[string]any{
 		"users": []map[string]any{{"id": "admin-1", "email": "ronald@example.com"}},
 	})
 
@@ -131,7 +172,7 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 		t.Fatalf("expected root organization slug primary-organization, got %q", rootNode.OrganizationSlug)
 	}
 
-	tenantSettings := index["settings.json"]
+	tenantSettings := index[testSettingsFileName]
 	if tenantSettings.LogicalType != "tenant" || tenantSettings.FileRole != "settings" {
 		t.Fatalf("unexpected tenant settings classification: %#v", tenantSettings)
 	}
@@ -139,7 +180,31 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 		t.Fatalf("expected installation id installation-1, got %q", tenantSettings.InstallationID)
 	}
 
-	deptSettings := index["departments/department-primary-department/settings.json"]
+	packManifest := index[filepath.ToSlash(filepath.Join("catalog", "packs", "pack-core", testManifestFileName))]
+	if packManifest.LogicalType != "catalog" || packManifest.FileRole != "manifest" {
+		t.Fatalf("unexpected pack manifest classification: %#v", packManifest)
+	}
+	if packManifest.ResourceSlug != "core" {
+		t.Fatalf("expected pack manifest resource slug core, got %q", packManifest.ResourceSlug)
+	}
+
+	entryManifest := index[filepath.ToSlash(filepath.Join("catalog", "packs", "pack-core", "entries", "app-shell", testManifestFileName))]
+	if entryManifest.LogicalType != "catalog" || entryManifest.FileRole != "manifest" {
+		t.Fatalf("unexpected catalog entry manifest classification: %#v", entryManifest)
+	}
+	if entryManifest.ResourceID != "app-shell" {
+		t.Fatalf("expected catalog entry manifest resource id app-shell, got %q", entryManifest.ResourceID)
+	}
+
+	standaloneManifest := index[filepath.ToSlash(filepath.Join("catalog", "standalone", "app-shell", testManifestFileName))]
+	if standaloneManifest.LogicalType != "catalog" || standaloneManifest.FileRole != "manifest" {
+		t.Fatalf("unexpected standalone manifest classification: %#v", standaloneManifest)
+	}
+	if standaloneManifest.ResourceSlug != "app-shell" {
+		t.Fatalf("expected standalone manifest resource slug app-shell, got %q", standaloneManifest.ResourceSlug)
+	}
+
+	deptSettings := index[filepath.ToSlash(filepath.Join("departments", "department-primary-department", testSettingsFileName))]
 	if deptSettings.DepartmentSlug != "primary-department" {
 		t.Fatalf("expected department slug primary-department, got %q", deptSettings.DepartmentSlug)
 	}
@@ -147,12 +212,12 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 		t.Fatalf("expected department resource id dept-1, got %q", deptSettings.ResourceID)
 	}
 
-	teamSettings := index["departments/department-primary-department/teams/team-primary-team/settings.json"]
+	teamSettings := index[filepath.ToSlash(filepath.Join("departments", "department-primary-department", "teams", "team-primary-team", testSettingsFileName))]
 	if teamSettings.TeamSlug != "primary-team" {
 		t.Fatalf("expected team slug primary-team, got %q", teamSettings.TeamSlug)
 	}
 
-	projectSettings := index["projects/project-primary-project/settings.json"]
+	projectSettings := index[filepath.ToSlash(filepath.Join("projects", "project-primary-project", testSettingsFileName))]
 	if projectSettings.ProjectSlug != "primary-project" {
 		t.Fatalf("expected project slug primary-project, got %q", projectSettings.ProjectSlug)
 	}
@@ -175,12 +240,12 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 		t.Fatalf("unexpected hierarchy folder node: %#v", hierarchyFolder)
 	}
 
-	hierarchyFolderACL := index["projects/project-primary-project/children/folder-design/acl.json"]
+	hierarchyFolderACL := index[filepath.ToSlash(filepath.Join("projects", "project-primary-project", "children", "folder-design", testACLFileName))]
 	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"]
+	childProjectSettings := index[filepath.ToSlash(filepath.Join("projects", "project-primary-project", "children", "folder-design", "children", "project-web", testSettingsFileName))]
 	if childProjectSettings.LogicalType != "project" || childProjectSettings.ProjectSlug != "web" {
 		t.Fatalf("unexpected child project classification: %#v", childProjectSettings)
 	}
@@ -190,12 +255,12 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 		t.Fatalf("unexpected tree folder node: %#v", treeFolder)
 	}
 
-	treeFolderACL := index["projects/project-primary-project/tree/folder-docs/folder.json"]
+	treeFolderACL := index[filepath.ToSlash(filepath.Join("projects", "project-primary-project", "tree", "folder-docs", testFolderFileName))]
 	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"]
+	treeItem := index[filepath.ToSlash(filepath.Join("projects", "project-primary-project", "tree", "folder-docs", "item-roadmap", testItemFileName))]
 	if treeItem.LogicalType != "item" || treeItem.FileRole != "item" {
 		t.Fatalf("unexpected tree item classification: %#v", treeItem)
 	}
@@ -203,12 +268,12 @@ func TestScanRootBuildsProjectedNodesFromBootstrapShape(t *testing.T) {
 		t.Fatalf("expected tree item resource slug roadmap, got %#v", treeItem.ResourceSlug)
 	}
 
-	usersData := index["users/data.json"]
+	usersData := index[filepath.ToSlash(filepath.Join("users", testDataFileName))]
 	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)
+		t.Fatalf("expected users/%s checksum and size to be populated: %#v", testDataFileName, usersData)
 	}
 }
 
@@ -219,13 +284,32 @@ func mustMkdirAll(t *testing.T, path string) {
 	}
 }
 
-func mustWriteJSON(t *testing.T, path string, payload any) {
+func mustWriteStructured(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)
+	var (
+		bytes []byte
+		err   error
+	)
+	switch filepath.Ext(path) {
+	case ".cbor":
+		bytes, err = cbor.Marshal(payload)
+	case ".json":
+		bytes, err = json.MarshalIndent(payload, "", "  ")
+		if err == nil {
+			bytes = append(bytes, '\n')
+		}
+	case ".jsonc":
+		bytes, err = json.MarshalIndent(payload, "", "  ")
+		if err == nil {
+			bytes = append([]byte("// Fixture JSONC with comments and trailing commas enabled.\n"), bytes...)
+			bytes = append(bytes[:len(bytes)-2], []byte(",\n}\n")...)
+		}
+	default:
+		t.Fatalf("unsupported structured fixture file %q", path)
+	}
+	if err != nil {
+		t.Fatalf("marshal %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/posixproj/projector_types.go

@@ -0,0 +1,58 @@
+// Path: Backend/internal/posixproj/projector_types.go
+
+package posixproj
+
+import "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
+}

Backend/internal/worker/runner.go

@@ -1,3 +1,5 @@
+// Path: Backend/internal/worker/runner.go
+
 package worker
 
 import (

Backend/internal/worker/runner_test.go

@@ -1,3 +1,5 @@
+// Path: Backend/internal/worker/runner_test.go
+
 package worker
 
 import (

Commands/Local/Dev/backend.just

@@ -1,30 +1,39 @@
 project_root := justfile_directory()
 backend_dir := project_root + "/Backend"
+common_sh := project_root + "/Commands/Local/scripts/common.sh"
+posix_root := project_root + "/POSIX"
 
 # Apply embedded database migrations.
 migrate-up:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{backend_dir}}' && go run ./cmd/migrate up
 
-# Roll back the most recent embedded database migration.
+# Roll back the most recent embedded database migration (confirmation required).
 migrate-down:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"; confirm_destructive_action "This will roll back the most recent embedded database migration. Continue?"'
 	cd '{{backend_dir}}' && go run ./cmd/migrate down
 
-# Reset all embedded database migrations.
+# Reset all embedded database migrations (confirmation required).
 migrate-reset:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"; confirm_destructive_action "This will reset all embedded database migrations. Continue?"'
 	cd '{{backend_dir}}' && go run ./cmd/migrate reset
 
-# Reset embedded database migrations and apply them again from scratch.
+# Reset embedded database migrations and apply them again from scratch (confirmation required).
 migrate-rebuild:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"; confirm_destructive_action "This will reset all embedded database migrations and reapply them from scratch. Continue?"'
 	cd '{{backend_dir}}' && go run ./cmd/migrate reset && go run ./cmd/migrate up
 
 # Show the embedded database migration status.
 migrate-status:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{backend_dir}}' && go run ./cmd/migrate status
 
 # Rebuild the POSIX-to-DB projection from the current POSIX root.
 posix-rebuild:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{backend_dir}}' && go run ./cmd/posix rebuild
 
 # Format backend Go source files.
 fmt:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{backend_dir}}' && gofmt -w ./cmd ./db ./internal

Commands/Local/Dev/frontend.just

@@ -2,13 +2,17 @@ project_root := justfile_directory()
 local_compose := project_root + "/Docker/docker-compose.local.dev.yaml"
 frontend_dir := project_root + "/Frontend"
 node_modules_volume := "moku_work_frontend_node_modules"
+common_sh := project_root + "/Commands/Local/scripts/common.sh"
+posix_root := project_root + "/POSIX"
 
-# Recreate the frontend node_modules Docker volume.
+# Recreate the frontend node_modules Docker volume (confirmation required).
 node_modules:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"; confirm_destructive_action "This will recreate the frontend node_modules Docker volume. Continue?"'
 	docker compose -f '{{local_compose}}' rm -sf frontend >/dev/null 2>&1 || true
 	docker volume rm -f '{{node_modules_volume}}' >/dev/null 2>&1 || true
 	docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate frontend
 
 # Run the frontend TypeScript check.
 tsc:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{frontend_dir}}' && pnpm typecheck

Commands/Local/Dev/mod.just

@@ -18,7 +18,7 @@ start:
 # Alias for the main full local development flow.
 dev: up
 
-# Stop and remove the local development stack.
+# Stop and remove the local development stack (confirmation required).
 down:
 	bash '{{stack_runner}}' down
 
@@ -34,6 +34,6 @@ logs:
 restart:
 	bash '{{stack_runner}}' restart
 
-# Stop the local development stack and remove local images, volumes, and backend dev state.
+# Stop the local development stack and remove local images, volumes, backend dev state, and the local POSIX folder (confirmation required).
 clean:
 	bash '{{stack_runner}}' clean

Commands/Local/Dev/scripts/backend-stack.sh

@@ -7,6 +7,7 @@ action=${1:-up}
 
 script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
 project_root=$(cd -- "$script_dir/../../../.." && pwd)
+posix_root="$project_root/POSIX"
 backend_dir="$project_root/Backend"
 backend_bake="$backend_dir/docker-bake.hcl"
 env_dir="$project_root/Env"
@@ -15,11 +16,14 @@ runtime_dir="$backend_dir/tmp/dev"
 backend_image="moku/work-backend:dev"
 backend_go_pkg_volume="moku_work_backend_go_pkg"
 backend_go_build_volume="moku_work_backend_go_build"
+local_uid=$(id -u)
+local_gid=$(id -g)
 
 services=(web api worker)
 
 source "$script_dir/docker.sh"
 source "$script_dir/env.sh"
+source "$project_root/Commands/Local/scripts/common.sh"
 
 build_backend() {
 	cd "$backend_dir"
@@ -27,20 +31,20 @@ build_backend() {
 }
 
 up_backend() {
-	docker compose -f "$compose_file" up -d --remove-orphans --force-recreate "${services[@]}"
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" up -d --remove-orphans --force-recreate "${services[@]}"
 }
 
 down_backend() {
-	docker compose -f "$compose_file" stop "${services[@]}" >/dev/null 2>&1 || true
-	docker compose -f "$compose_file" rm -f "${services[@]}" >/dev/null 2>&1 || true
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" stop "${services[@]}" >/dev/null 2>&1 || true
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" rm -f "${services[@]}" >/dev/null 2>&1 || true
 }
 
 restart_backend() {
-	docker compose -f "$compose_file" restart "${services[@]}"
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" restart "${services[@]}"
 }
 
 follow_logs() {
-	docker compose -f "$compose_file" logs -f "${services[@]}"
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" logs -f "${services[@]}"
 }
 
 clean_runtime() {
@@ -50,34 +54,44 @@ clean_runtime() {
 case "$action" in
 	check)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_posix_root "$project_root" "$posix_root"
 		;;
 	build)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_posix_root "$project_root" "$posix_root"
 		build_backend
 		;;
 	up)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
 		up_backend
+		run_compose_api_migrations "$compose_file" "api"
 		;;
 	down)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
+		confirm_destructive_action 'This will stop and remove the local backend dev containers. Continue?'
 		down_backend
 		;;
 	restart)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
 		restart_backend
 		;;
 	logs)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
 		follow_logs
 		;;
 	clean)
 		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
+		confirm_destructive_action 'This will remove the local backend dev containers, images, volumes, and runtime state. Continue?'
 		down_backend
 		remove_docker_image_if_present "$backend_image"
 		remove_docker_volume_if_present "$backend_go_pkg_volume"

Commands/Local/Dev/scripts/dev-stack.sh

@@ -7,12 +7,15 @@ action=${1:-up}
 
 script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
 project_root=$(cd -- "$script_dir/../../../.." && pwd)
+posix_root="$project_root/POSIX"
 frontend_dir="$project_root/Frontend"
 frontend_bake="$frontend_dir/docker-bake.hcl"
 backend_dir="$project_root/Backend"
 backend_bake="$backend_dir/docker-bake.hcl"
 env_dir="$project_root/Env"
 compose_file="$project_root/Docker/docker-compose.local.dev.yaml"
+local_uid=$(id -u)
+local_gid=$(id -g)
 frontend_image="moku/work-frontend:dev"
 backend_image="moku/work-backend:dev"
 frontend_volume="moku_work_frontend_node_modules"
@@ -22,6 +25,7 @@ backend_runtime_dir="$backend_dir/tmp/dev"
 
 source "$script_dir/docker.sh"
 source "$script_dir/env.sh"
+source "$project_root/Commands/Local/scripts/common.sh"
 
 build_frontend() {
 	cd "$frontend_dir"
@@ -39,19 +43,19 @@ build_images() {
 }
 
 up_stack() {
-	docker compose -f "$compose_file" up -d --remove-orphans --force-recreate
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" up -d --remove-orphans --force-recreate
 }
 
 down_stack() {
-	docker compose -f "$compose_file" down --remove-orphans --volumes
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" down --remove-orphans --volumes
 }
 
 follow_logs() {
-	docker compose -f "$compose_file" logs -f
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" logs -f
 }
 
 clean_stack() {
-	docker compose -f "$compose_file" down --remove-orphans --volumes >/dev/null 2>&1 || true
+	LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" down --remove-orphans --volumes >/dev/null 2>&1 || true
 	remove_docker_image_if_present "$frontend_image"
 	remove_docker_image_if_present "$backend_image"
 	remove_docker_volume_if_present "$frontend_volume"
@@ -63,37 +67,47 @@ clean_stack() {
 start_stack() {
 	build_images
 	up_stack
+	run_compose_api_migrations "$compose_file" "api"
 }
 
 case "$action" in
 	build)
 		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		ensure_posix_root "$project_root" "$posix_root"
 		build_images
 		;;
 	up|start|rebuild)
 		ensure_docker 'docker is required for the local development stack. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
 		start_stack
 		;;
 	down)
 		ensure_docker 'docker is required for the local development stack. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
+		confirm_destructive_action 'This will stop the local development stack and remove its containers and volumes. Continue?'
 		down_stack
 		;;
 	restart)
 		ensure_docker 'docker is required for the local development stack. Install Docker first.'
 		ensure_local_env_file "$env_dir"
-		docker compose -f "$compose_file" restart
+		ensure_posix_root "$project_root" "$posix_root"
+		LOCAL_UID="$local_uid" LOCAL_GID="$local_gid" docker compose -f "$compose_file" restart
 		;;
 	logs)
 		ensure_docker 'docker is required for the local development stack. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
 		follow_logs
 		;;
 	clean)
 		ensure_docker 'docker is required for the local development stack. Install Docker first.'
 		ensure_local_env_file "$env_dir"
+		ensure_posix_root "$project_root" "$posix_root"
+		confirm_destructive_action 'This will remove the local development stack, local images, volumes, backend dev state, and the local POSIX folder. Continue?'
 		clean_stack
+		rm -rf "$posix_root"
 		;;
 	*)
 		printf 'Unsupported dev stack action: %s\n' "$action" >&2

Commands/Local/prod.just

@@ -5,40 +5,49 @@ local_compose := project_root + "/Docker/docker-compose.local.prod.yaml"
 proxy_image := "moku/work-proxy:local-prod"
 backend_api_image := "moku/work-backend:local-prod-api"
 backend_worker_image := "moku/work-backend:local-prod-worker"
+common_sh := project_root + "/Commands/Local/scripts/common.sh"
+posix_root := project_root + "/POSIX"
 
 # Build the local production proxy image locally.
 build:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{project_root}}' && docker buildx bake -f '{{proxy_bake}}' prod
 	cd '{{project_root}}' && docker buildx bake -f '{{backend_bake}}' prod-api prod-worker
 
 # Start the local production stack in the background using the current image.
 up:
-	docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
+	LOCAL_UID="$$(id -u)" LOCAL_GID="$$(id -g)" docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
 
 # Build first, then start the local production stack in the background.
 start: build up
 
 # Rebuild the local production proxy image locally.
 rebuild:
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
 	cd '{{project_root}}' && docker buildx bake -f '{{proxy_bake}}' --set '*.no-cache=true' prod
 	cd '{{project_root}}' && docker buildx bake -f '{{backend_bake}}' --set '*.no-cache=true' prod-api prod-worker
-	docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
+	LOCAL_UID="$$(id -u)" LOCAL_GID="$$(id -g)" docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
 
-# Stop and remove the local production stack.
+# Stop and remove the local production stack (confirmation required).
 down:
-	docker compose -f '{{local_compose}}' down --remove-orphans --volumes
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"; confirm_destructive_action "This will stop the local production stack and remove its containers and volumes. Continue?"'
+	LOCAL_UID="$$(id -u)" LOCAL_GID="$$(id -g)" docker compose -f '{{local_compose}}' down --remove-orphans --volumes
 
 # Follow logs for the local production stack.
 logs:
-	docker compose -f '{{local_compose}}' logs -f
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
+	LOCAL_UID="$$(id -u)" LOCAL_GID="$$(id -g)" docker compose -f '{{local_compose}}' logs -f
 
 # Restart the local production stack.
 restart:
-	docker compose -f '{{local_compose}}' restart
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"'
+	LOCAL_UID="$$(id -u)" LOCAL_GID="$$(id -g)" docker compose -f '{{local_compose}}' restart
 
-# Stop the local production stack and remove local images.
+# Stop the local production stack and remove local images (confirmation required).
 clean:
-	docker compose -f '{{local_compose}}' down --remove-orphans --volumes
+	bash -c 'source "{{common_sh}}"; ensure_posix_root "{{project_root}}" "{{posix_root}}"; confirm_destructive_action "This will remove the local production stack, its volumes, and the local production images. Continue?"'
+	LOCAL_UID="$$(id -u)" LOCAL_GID="$$(id -g)" docker compose -f '{{local_compose}}' down --remove-orphans --volumes
 	docker image rm -f '{{proxy_image}}' >/dev/null 2>&1 || true
 	docker image rm -f '{{backend_api_image}}' >/dev/null 2>&1 || true
 	docker image rm -f '{{backend_worker_image}}' >/dev/null 2>&1 || true

Commands/Local/scripts/common.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ensure_posix_root() {
+	local project_root=${1:?project root is required}
+	local posix_root=${2:-"$project_root/POSIX"}
+
+	mkdir -p "$posix_root"
+}
+
+confirm_destructive_action() {
+	local prompt=${1:-Are you sure you want to continue?}
+	local response_input=""
+
+	if [[ "${JUST_YES:-0}" == "1" ]]; then
+		return 0
+	fi
+
+	if [[ -t 0 ]]; then
+		printf '%s [y/N] ' "$prompt"
+		IFS= read -r response_input
+	elif [[ -r /dev/tty ]]; then
+		printf '%s [y/N] ' "$prompt" > /dev/tty
+		IFS= read -r response_input < /dev/tty
+	else
+		printf 'Refusing destructive action without interactive confirmation. Re-run with JUST_YES=1 to continue.\n' >&2
+		exit 1
+	fi
+
+	case "$response_input" in
+		y|Y|yes|YES|Yes)
+			return 0
+			;;
+		*)
+			printf 'Aborted.\n' >&2
+			exit 1
+			;;
+	esac
+}
+
+run_compose_api_migrations() {
+	local compose_file=${1:?compose file is required}
+	local service_name=${2:-api}
+	local max_attempts=${3:-20}
+	local sleep_seconds=${4:-2}
+	local attempt=1
+	local output=""
+
+	while (( attempt <= max_attempts )); do
+		if output=$(docker compose -f "$compose_file" exec -T "$service_name" sh -lc 'export PATH="$PATH:/usr/local/go/bin"; go run ./cmd/migrate up' 2>&1); then
+			printf '%s\n' "$output"
+			return 0
+		fi
+
+		if (( attempt == max_attempts )); then
+			printf 'Failed to apply database migrations automatically after %d attempts.\n' "$max_attempts" >&2
+			printf '%s\n' "$output" >&2
+			return 1
+		fi
+
+		sleep "$sleep_seconds"
+		attempt=$((attempt + 1))
+	done
+}

Docker/docker-compose.local.dev.yaml

@@ -1,12 +1,16 @@
 x-backend-service: &backend-service
   image: moku/work-backend:dev
   restart: unless-stopped
+  user: "${LOCAL_UID:-1000}:${LOCAL_GID:-1000}"
   env_file:
     - ../Env/.env.local
   environment:
     DATABASE_URL: postgres://moku:moku_dev_password@postgres:5432/moku?sslmode=disable
     VALKEY_URL: redis://valkey:6379/0
     POSIX_ROOT: /posix
+    HOME: /tmp/home
+    GOMODCACHE: /tmp/go/pkg/mod
+    GOCACHE: /tmp/go-build
   depends_on:
     postgres:
       condition: service_healthy
@@ -15,8 +19,8 @@ x-backend-service: &backend-service
   volumes:
     - ../Backend:/app
     - ../POSIX:/posix
-    - moku_work_backend_go_pkg:/go/pkg/mod
-    - moku_work_backend_go_build:/root/.cache/go-build
+    - moku_work_backend_go_pkg:/tmp/go/pkg/mod
+    - moku_work_backend_go_build:/tmp/go-build
 
 services:
   postgres:

Docker/docker-compose.local.prod.yaml

@@ -1,5 +1,6 @@
 x-backend-service: &backend-service
   restart: unless-stopped
+  user: "${LOCAL_UID:-1000}:${LOCAL_GID:-1000}"
   env_file:
     - ../Env/.env.local
   environment:

Documentation/POSIX-Structure.md

@@ -1,75 +1,81 @@
 # 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*)
+Note: regenerate the external filetree link if you want the hosted visual tree to reflect the new `.cbor` and `.jsonc` paths.
 
 ``` markdown
 Personal or Organization (server)/
-├── settings.json
-├── layout.json
+├── settings.cbor
 ├── catalog/
 │   ├── packs/
 │   │   └── pack-<slug>/
-│   │       ├── manifest.json
+│   │       ├── manifest.jsonc
 │   │       └── entries/
 │   │           └── app-<slug>/
-│   │               └── manifest.json
+│   │               └── manifest.jsonc
 │   └── standalone/
 │       └── app-<slug>/
-│           └── manifest.json
+│           └── manifest.jsonc
 ├── departments/
 │   └── department-<slug>/
-│       ├── settings.json
-│       ├── users.json
+│       ├── settings.cbor
+│       ├── users.cbor
 │       └── teams/
 │           └── team-<slug>/
-│               ├── settings.json
-│               └── users.json
+│               ├── settings.cbor
+│               └── users.cbor
 ├── projects/
 │   └── project-<slug>/
-│       ├── settings.json
-│       ├── home.json
-│       ├── acl.json
+│       ├── settings.cbor
+│       ├── home.cbor
+│       ├── acl.cbor
 │       ├── children/
 │       │   └── folder-<slug>/
-│       │       ├── folder.json
-│       │       ├── acl.json
+│       │       ├── folder.cbor
+│       │       ├── acl.cbor
 │       │       └── children/
 │       │           └── project-<slug>/
-│       │               ├── settings.json
-│       │               ├── home.json
-│       │               ├── acl.json
+│       │               ├── settings.cbor
+│       │               ├── home.cbor
+│       │               ├── acl.cbor
 │       │               ├── children/
 │       │               └── tree/
 │       └── tree/
 │           ├── item-<slug>/
-│           │   ├── item.json
+│           │   ├── item.cbor
 │           │   ├── schema.json
-│           │   └── data.json
+│           │   └── data.cbor
 │           └── folder-<slug>/
-│               ├── folder.json
+│               ├── folder.cbor
 │               └── item-<slug>/
-│                   ├── item.json
+│                   ├── item.cbor
 │                   ├── schema.json
-│                   └── data.json
+│                   └── data.cbor
 └── users/
-    ├── settings.json
-    ├── data.json
+    ├── settings.cbor
+    ├── data.cbor
     └── personals/
         └── personal-<slug>/
-            ├── layout.json
-            ├── settings.json
-            ├── home.json
+            ├── layout.cbor
+            ├── settings.cbor
+            ├── home.cbor
             └── 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.
+- `settings.cbor` — Machine-owned metadata and presentation config for the thing, such as display name, icon, description, and simple settings.
+- `layout.cbor` — Machine-owned layout configuration for the current server or personal space.
+- `home.cbor` — Machine-owned home surface configuration, such as widgets, sections, and how they are arranged.
+- `folder.cbor` — Machine-owned metadata for a folder node in a tree.
+- `item.cbor` — Machine-owned 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.
+- `data.cbor` — The machine-owned content or state data for that item.
+- `manifest.jsonc` — Human-facing catalog definition metadata, including versioning, description, capabilities, and comments for reusable apps or entries.
+- `users.cbor` — Machine-owned user membership or assignment data for departments and teams.
+- `acl.cbor` — Machine-owned access control data for projects and folders.
+
+## Format Rules
+
+- Use `*.jsonc` for catalog manifests that may be authored or reviewed by humans.
+- Use `*.cbor` for machine-owned POSIX state and metadata files where parse speed, compactness, and backupability matter more than direct editability.
+- Keep `schema.json` as JSON so it remains compatible with JSON Schema tooling and validation flows.

Documentation/TODO.md

@@ -63,11 +63,11 @@
 - [ ] POSIX-Lite-File-Persistence-Foundation
   - [ ] Mounted-Storage-Root-Config
   - [ ] Project-Folder-Creation-On-Backend
-  - [ ] moku.project.json
+  - [ ] manifest.jsonc
   - [ ] Item-Folder-Creation
-  - [ ] item.json
+  - [ ] item.cbor
   - [ ] schema.json
-  - [ ] data.json
+  - [ ] data.cbor
   - [ ] DB-To-Files-Write-Flow
 - [ ] User-and-Workspace-Domain-Readiness
   - [ ] Base-Workspace

Frontend/package.json

@@ -17,6 +17,7 @@
 		"preview": "vite preview"
 	},
 	"dependencies": {
+		"@solidjs/router": "^0.16.1",
 		"@solidjs/start": "2.0.0-alpha.2",
 		"@solidjs/vite-plugin-nitro-2": "^0.1.0",
 		"lucide-solid": "^0.542.0",

Frontend/pnpm-lock.yaml

@@ -8,6 +8,9 @@ importers:
 
   .:
     dependencies:
+      '@solidjs/router':
+        specifier: ^0.16.1
+        version: 0.16.1(solid-js@1.9.11)
       '@solidjs/start':
         specifier: 2.0.0-alpha.2
         version: 2.0.0-alpha.2(crossws@0.4.4(srvx@0.11.8))(vite@7.3.1(@types/node@25.9.3)(jiti@2.6.1)(sass-embedded@1.100.0)(sass@1.101.0)(terser@5.46.0))
@@ -1210,6 +1213,11 @@ packages:
     peerDependencies:
       solid-js: '>=1.8.4'
 
+  '@solidjs/router@0.16.1':
+    resolution: {integrity: sha512-IhyjedgC6LRpw/8CPGGI89FrV+r0xTHzOl2c4CRyzYQ1bLepJxbVI1LLKvsavMWY5TRBRacV7hAeOhuTXkjiqg==}
+    peerDependencies:
+      solid-js: ^1.8.6
+
   '@solidjs/start@2.0.0-alpha.2':
     resolution: {integrity: sha512-z56ATi3P07q8F5Io2I+RQrwjyWZtFZzpXN/J+8scf/gqrAW83LtgRkZFZjJaGH7i9WrHP+ep9F+ZiJ2gDHVBcw==}
     engines: {node: '>=22'}
@@ -4485,6 +4493,10 @@ snapshots:
     dependencies:
       solid-js: 1.9.11
 
+  '@solidjs/router@0.16.1(solid-js@1.9.11)':
+    dependencies:
+      solid-js: 1.9.11
+
   '@solidjs/start@2.0.0-alpha.2(crossws@0.4.4(srvx@0.11.8))(vite@7.3.1(@types/node@25.9.3)(jiti@2.6.1)(sass-embedded@1.100.0)(sass@1.101.0)(terser@5.46.0))':
     dependencies:
       '@babel/core': 7.29.0

Frontend/src/app.tsx

@@ -1,12 +1,17 @@
 // Path: Frontend/src/app.tsx
 
-import type { JSX } from "solid-js";
-import { AppShell } from "./components/app-shell/AppShell/AppShell";
+import { Suspense, type JSX } from "solid-js";
+import { Router } from "@solidjs/router";
+import { FileRoutes } from "@solidjs/start/router";
 import "./styles/main.scss";
 import "./styles/user-overrides.scss";
 
 const App = (): JSX.Element => {
-	return <AppShell />;
+	return (
+		<Router root={(props): JSX.Element => <Suspense>{props.children}</Suspense>}>
+			<FileRoutes />
+		</Router>
+	);
 };
 
 export default App;

Frontend/src/components/app-shell/AppShell/AppShell.module.scss

@@ -95,6 +95,8 @@
   min-width: 0;
   min-height: 0;
   position: relative;
+  display: grid;
+  grid-template-rows: auto minmax(0, 1fr);
   overflow: hidden;
   z-index: 1;
   border-top: 1px solid var(--shell-frame-border);
@@ -103,6 +105,14 @@
   border-top-right-radius: 0;
 }
 
+.workspaceContent {
+  min-width: 0;
+  min-height: 0;
+  height: 100%;
+  overflow: auto;
+  scrollbar-gutter: stable;
+}
+
 .mobileWorkspaceView {
   min-width: 0;
   min-height: 0;

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

@@ -1,10 +1,11 @@
 // Path: Frontend/src/components/app-shell/AppShell/AppShell.tsx
 
+import { useLocation } from "@solidjs/router";
 import { createSignal, onCleanup, onMount, Show, type JSX } from "solid-js";
 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 { getWorkspaceBreadcrumbSegments } from "../data/workspace-routes";
 import { LeftRail } from "../../workspace-navigation/LeftRail/LeftRail";
 import { MobileBottomNav } from "../MobileBottomNav/MobileBottomNav";
 import { MobileWorkspaceBrowser } from "../../workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser";
@@ -19,7 +20,7 @@ import styles from "./AppShell.module.scss";
 type MobileWorkspaceView = "notifications" | "profile" | null;
 const MOBILE_VIEWPORT_QUERY = "(max-width: 48rem)";
 
-const AppShellContent = (): JSX.Element => {
+const AppShellContent = (props: { children: JSX.Element }): JSX.Element => {
 	const [themeState, setThemeState] = createSignal<Theme>("light");
 	const [isRailCollapsed, setIsRailCollapsed] = createSignal(false);
 	const [isSidebarCollapsed, setIsSidebarCollapsed] = createSignal(false);
@@ -27,6 +28,7 @@ const AppShellContent = (): JSX.Element => {
 	const [isMobileWorkspaceBrowserOpen, setIsMobileWorkspaceBrowserOpen] = createSignal(false);
 	const [activeMobileWorkspaceView, setActiveMobileWorkspaceView] = createSignal<MobileWorkspaceView>(null);
 	const appShellData = useAppShellData();
+	const location = useLocation();
 
 	onMount((): void => {
 		setThemeState(getDocumentTheme());
@@ -82,7 +84,15 @@ const AppShellContent = (): JSX.Element => {
 		setActiveMobileWorkspaceView(null);
 	};
 
-	const workspaceBreadcrumb = (): string => `${appShellData.activeServer().name} / ${appShellData.activeProject().name} / Home`;
+	const workspaceBreadcrumb = (): string =>
+		[
+			appShellData.activeServer().name,
+			...getWorkspaceBreadcrumbSegments(location.pathname, {
+				activeProjectName: appShellData.activeProject().name,
+				activeDepartmentName: appShellData.activeDepartment().name,
+				activeTeamName: appShellData.activeDepartment().teamName,
+			}),
+		].join(" / ");
 
 	return (
 		<div class={styles.shell} data-ui="app-shell" data-app-shell-status={appShellData.status()}>
@@ -136,7 +146,9 @@ const AppShellContent = (): JSX.Element => {
 											setIsSidebarCollapsed((collapsed) => !collapsed);
 										}}
 									/>
-									<WorkspaceHome />
+									<div class={styles.workspaceContent} data-slot="workspace-content">
+										{props.children}
+									</div>
 								</>
 							}
 						>
@@ -175,10 +187,10 @@ const AppShellContent = (): JSX.Element => {
 	);
 };
 
-export const AppShell = (): JSX.Element => {
+export const AppShell = (props: { children: JSX.Element }): JSX.Element => {
 	return (
 		<AppShellDataProvider>
-			<AppShellContent />
+			<AppShellContent>{props.children}</AppShellContent>
 		</AppShellDataProvider>
 	);
 };

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

@@ -1,13 +1,22 @@
 // Path: Frontend/src/components/app-shell/ServerDock/ServerDock.tsx
 
 import { For, Show, type JSX } from "solid-js";
+import { useNavigate } from "@solidjs/router";
 import { useAppShellData } from "../data/app-shell.context";
+import { getWorkspaceSurfaceRoute } from "../data/workspace-routes";
 import styles from "./ServerDock.module.scss";
 
 export const ServerDock = (): JSX.Element => {
 	const appShellData = useAppShellData();
+	const navigate = useNavigate();
 	const activeServer = () => appShellData.activeServer();
 
+	const handleAction = (actionId: string): void => {
+		if (actionId === "settings" || actionId === "server") {
+			navigate(getWorkspaceSurfaceRoute("settings"));
+		}
+	};
+
 	return (
 		<section class={styles.panel} aria-label="Server dock" data-ui="server-dock" data-server-kind={activeServer().kind}>
 			<div class={styles.identity} data-slot="server-dock-identity">
@@ -35,7 +44,15 @@ export const ServerDock = (): JSX.Element => {
 							const Icon = item.icon;
 
 							return (
-								<button type="button" class={styles.action} aria-label={item.label} title={item.label} data-slot="server-dock-action" data-action-id={item.id}>
+								<button
+									type="button"
+									class={styles.action}
+									aria-label={item.label}
+									title={item.label}
+									data-slot="server-dock-action"
+									data-action-id={item.id}
+									onClick={() => handleAction(item.id)}
+								>
 									<Icon size={16} strokeWidth={2} />
 									<span class={styles.actionLabel}>{item.label}</span>
 								</button>

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

@@ -1,14 +1,8 @@
 // Path: Frontend/src/components/app-shell/data/app-shell.context.tsx
 
-import {
-	createContext,
-	createMemo,
-	createSignal,
-	onMount,
-	useContext,
-	type JSX,
-} from "solid-js";
+import { createContext, createMemo, createSignal, onMount, useContext, type JSX } from "solid-js";
 import { resolveAPIBase } from "../../../lib/api";
+import { applyThemePresetById, resolvePreferredThemePresetId } from "../../../helper/themeRuntime";
 import {
 	buildActiveDepartment,
 	buildActiveProject,
@@ -56,7 +50,13 @@ export const AppShellDataProvider = (props: { children: JSX.Element }): JSX.Elem
 				throw new Error(errorMessage || "Failed to load app shell state.");
 			}
 
-			setPayload(normalizeAppShellPayload(body.data));
+			const normalizedPayload = normalizeAppShellPayload(body.data);
+			const persistedThemePresetId = normalizedPayload.admin?.themePresetId?.trim();
+			if (persistedThemePresetId && persistedThemePresetId !== resolvePreferredThemePresetId()) {
+				await applyThemePresetById(persistedThemePresetId);
+			}
+
+			setPayload(normalizedPayload);
 			setStatus("success");
 		} catch (loadError) {
 			setStatus("error");
@@ -72,6 +72,7 @@ export const AppShellDataProvider = (props: { children: JSX.Element }): JSX.Elem
 		status,
 		error,
 		installation: createMemo(() => payload()?.installation),
+		admin: createMemo(() => payload()?.admin),
 		railItems: createMemo(() => buildRailItems(payload())),
 		activeServer: createMemo(() => buildActiveServer(payload())),
 		activeProject: createMemo(() => buildActiveProject(payload())),

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

@@ -30,6 +30,7 @@ export type AppShellAdmin = {
 	displayName: string;
 	isInstanceAdmin: boolean;
 	homeTitle: string;
+	themePresetId?: string;
 };
 
 export type AppShellOrganization = {
@@ -87,6 +88,7 @@ export type AppShellContextValue = {
 	status: Accessor<"idle" | "loading" | "success" | "error">;
 	error: Accessor<string>;
 	installation: Accessor<AppShellInstallation | undefined>;
+	admin: Accessor<AppShellAdmin | undefined>;
 	railItems: Accessor<readonly RailItem[]>;
 	activeServer: Accessor<ActiveServer>;
 	activeProject: Accessor<ActiveProject>;

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

@@ -103,10 +103,12 @@ export type SidebarItem = {
 
 export type WorkspaceStaticKind = "workspace" | "home" | "settings";
 
+export type WorkspaceStaticSurfaceKind = Exclude<WorkspaceStaticKind, "workspace">;
+
 export type WorkspaceItemTypeId = string;
 
 export type WorkspaceStaticItem = SidebarItem & {
-	contextKind: WorkspaceStaticKind;
+	contextKind: WorkspaceStaticSurfaceKind;
 };
 
 export type WorkspaceFolderNode = {

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

@@ -0,0 +1,79 @@
+// Path: Frontend/src/components/app-shell/data/workspace-routes.ts
+
+import type { WorkspaceStaticKind } from "./shell.types";
+
+export type WorkspaceSurfaceKind = Exclude<WorkspaceStaticKind, "workspace">;
+export type SettingsSectionKind = "account" | "workspace" | "server" | "theme" | "security" | "members";
+
+export type WorkspaceBreadcrumbContext = {
+	activeProjectName: string;
+	activeDepartmentName: string;
+	activeTeamName?: string;
+};
+
+const workspaceSurfaceRoutes: Record<WorkspaceSurfaceKind, string> = {
+	home: "/workspace/home",
+	settings: "/settings",
+};
+
+export const getWorkspaceSurfaceRoute = (surface: WorkspaceSurfaceKind): string => workspaceSurfaceRoutes[surface];
+
+const settingsSectionRoutes: Record<SettingsSectionKind, string> = {
+	account: "/settings/account",
+	workspace: "/settings/workspace",
+	server: "/settings/server",
+	theme: "/settings/theme",
+	security: "/settings/security",
+	members: "/settings/members",
+};
+
+export const getSettingsSectionRoute = (section: SettingsSectionKind): string => settingsSectionRoutes[section];
+
+export const getWorkspaceSurfaceFromPathname = (pathname: string): WorkspaceSurfaceKind => {
+	if (pathname.startsWith(workspaceSurfaceRoutes.settings) || pathname.startsWith("/workspace/settings")) {
+		return "settings";
+	}
+
+	return "home";
+};
+
+export const getWorkspaceSurfaceBreadcrumbLabel = (pathname: string): string => {
+	const surface = getWorkspaceSurfaceFromPathname(pathname);
+	return surface === "settings" ? "Settings" : "Home";
+};
+
+const getSettingsSectionFromPathname = (pathname: string): SettingsSectionKind | null => {
+	const matchedEntry = (Object.entries(settingsSectionRoutes) as Array<[SettingsSectionKind, string]>).find(([, route]) => pathname.startsWith(route));
+
+	return matchedEntry?.[0] ?? null;
+};
+
+export const getWorkspaceBreadcrumbSegments = (
+	pathname: string,
+	context: WorkspaceBreadcrumbContext,
+): string[] => {
+	const settingsSection = getSettingsSectionFromPathname(pathname);
+
+	if (pathname === workspaceSurfaceRoutes.settings || pathname === "/workspace/settings") {
+		return ["Settings"];
+	}
+
+	if (settingsSection) {
+		switch (settingsSection) {
+			case "account":
+				return ["Users", "Settings"];
+			case "workspace":
+				return [context.activeProjectName, "Settings"];
+			case "server":
+				return ["Settings"];
+			case "theme":
+				return ["Personal", "Settings"];
+			case "security":
+				return ["Users", "Settings"];
+			case "members":
+				return [context.activeTeamName || context.activeDepartmentName || "Members", "Users"];
+		}
+	}
+
+	return [context.activeProjectName, getWorkspaceSurfaceBreadcrumbLabel(pathname)];
+};

Frontend/src/components/settings/SettingsDetailPage/SettingsDetailPage.module.scss

@@ -0,0 +1,86 @@
+// Path: Frontend/src/components/settings/SettingsDetailPage/SettingsDetailPage.module.scss
+
+.viewport {
+	width: 100%;
+	max-width: min(72rem, 100%);
+	min-height: 100%;
+	padding: var(--space-5) var(--space-6) calc(var(--space-7) + env(safe-area-inset-bottom));
+	box-sizing: border-box;
+	display: grid;
+	gap: var(--space-6);
+	align-content: start;
+}
+
+.hero,
+.panel {
+	border: 1px solid var(--color-border-subtle);
+	border-radius: var(--radius-xl);
+	background: var(--color-surface-raised);
+	box-shadow: var(--shadow-sm);
+	padding: var(--space-6);
+	display: grid;
+	gap: var(--space-2);
+}
+
+.hero {
+	border-color: color-mix(in srgb, var(--color-accent) 18%, var(--color-border-subtle));
+	box-shadow:
+		0 10px 24px color-mix(in srgb, var(--color-accent) 8%, transparent),
+		var(--shadow-sm);
+}
+
+.backLink {
+	width: fit-content;
+	text-decoration: none;
+	color: color-mix(in srgb, var(--color-accent) 34%, var(--color-text-primary));
+	@include text-label;
+}
+
+.backLink:hover {
+	text-decoration: underline;
+}
+
+.title,
+.panelTitle {
+	margin: 0;
+	color: var(--color-text-primary);
+}
+
+.title {
+	@include text-display;
+	line-height: 1.02;
+	letter-spacing: -0.02em;
+}
+
+.panelTitle {
+	@include text-title;
+	line-height: 1.12;
+}
+
+.description,
+.focusList {
+	margin: 0;
+	color: var(--color-text-secondary);
+	@include text-body;
+}
+
+.focusList {
+	padding-left: 1.1rem;
+	display: grid;
+	gap: 0.35rem;
+}
+
+.focusList li::marker {
+	color: color-mix(in srgb, var(--color-accent) 44%, var(--color-text-secondary));
+}
+
+@media (max-width: 48rem) {
+	.viewport {
+		padding: var(--space-4) var(--space-4) calc(var(--space-8) + env(safe-area-inset-bottom));
+	}
+
+	.hero,
+	.panel {
+		padding: var(--space-4);
+	}
+}

Frontend/src/components/settings/SettingsDetailPage/SettingsDetailPage.tsx

@@ -0,0 +1,32 @@
+// Path: Frontend/src/components/settings/SettingsDetailPage/SettingsDetailPage.tsx
+
+import { A } from "@solidjs/router";
+import { For, type JSX } from "solid-js";
+import styles from "./SettingsDetailPage.module.scss";
+
+type SettingsDetailPageProps = {
+	title: string;
+	description: string;
+	focus: readonly string[];
+};
+
+export const SettingsDetailPage = (props: SettingsDetailPageProps): JSX.Element => {
+	return (
+		<main class={styles.viewport}>
+			<section class={styles.hero}>
+				<A class={styles.backLink} href="/settings">
+					Back to Settings
+				</A>
+				<h1 class={styles.title}>{props.title}</h1>
+				<p class={styles.description}>{props.description}</p>
+			</section>
+
+			<section class={styles.panel}>
+				<h2 class={styles.panelTitle}>Focus areas</h2>
+				<ul class={styles.focusList}>
+					<For each={props.focus}>{(item) => <li>{item}</li>}</For>
+				</ul>
+			</section>
+		</main>
+	);
+};

Frontend/src/components/settings/SettingsWorkspace/SettingsWorkspace.module.scss

@@ -0,0 +1,229 @@
+// Path: Frontend/src/components/settings/SettingsWorkspace/SettingsWorkspace.module.scss
+
+.viewport {
+	--settings-page-max-width: min(88rem, 100%);
+
+	min-height: 100%;
+	box-sizing: border-box;
+	display: grid;
+	gap: var(--space-6);
+	padding-top: var(--space-5);
+	padding-right: var(--space-6);
+	padding-bottom: calc(var(--space-7) + env(safe-area-inset-bottom));
+	padding-left: var(--space-6);
+	align-content: start;
+}
+
+.hero {
+	display: grid;
+	gap: var(--space-4);
+	width: 100%;
+	max-width: var(--settings-page-max-width);
+	padding-inline: var(--space-6);
+	box-sizing: border-box;
+}
+
+.heroCopy,
+.card {
+	border: 1px solid var(--color-border-subtle);
+	border-radius: var(--radius-xl);
+	box-shadow: var(--shadow-sm);
+}
+
+.heroCopy {
+	padding: var(--space-6);
+	display: grid;
+	gap: var(--space-2);
+	position: relative;
+	background: var(--color-surface-raised);
+	border-color: color-mix(in srgb, var(--color-accent) 32%, var(--color-border-subtle));
+	box-shadow:
+		0 12px 28px color-mix(in srgb, var(--color-accent) 8%, transparent),
+		var(--shadow-sm);
+}
+
+	.eyebrow,
+	.sectionEyebrow {
+		margin: 0;
+		color: color-mix(in srgb, var(--color-accent) 42%, var(--color-text-tertiary));
+	@include text-label;
+}
+
+.title,
+.sectionTitle,
+.cardTitle {
+	margin: 0;
+	color: var(--color-text-primary);
+}
+
+.title {
+	@include text-display;
+	max-width: 13ch;
+	text-wrap: balance;
+	letter-spacing: -0.025em;
+	line-height: 1.02;
+}
+
+	.description,
+	.sectionDescription,
+	.cardDescription,
+	.focusList {
+	margin: 0;
+	color: var(--color-text-secondary);
+	@include text-body;
+}
+
+.focusList {
+	padding-left: 1.1rem;
+	display: grid;
+	gap: 0.45rem;
+}
+
+.sectionStack {
+	width: 100%;
+	max-width: var(--settings-page-max-width);
+	display: grid;
+	gap: var(--space-5);
+	padding-inline: var(--space-6);
+	box-sizing: border-box;
+}
+
+.section {
+	display: grid;
+	gap: var(--space-4);
+}
+
+.sectionHeader {
+	display: grid;
+	gap: var(--space-2);
+}
+
+.sectionTitle {
+	@include text-title;
+}
+
+.cardGrid {
+	display: grid;
+	grid-template-columns: repeat(2, minmax(0, 1fr));
+	gap: var(--space-4);
+}
+
+.card {
+	padding: var(--space-5);
+	display: grid;
+	gap: var(--space-3);
+	align-items: start;
+	text-decoration: none;
+	color: inherit;
+	position: relative;
+	background: var(--color-surface-raised);
+	transition:
+		transform 120ms ease,
+		border-color 120ms ease,
+		box-shadow 120ms ease;
+}
+
+.card::before {
+	content: none;
+}
+
+.card::after {
+	content: none;
+}
+
+.card:hover {
+	transform: translateY(-1px);
+	border-color: color-mix(in srgb, var(--color-accent) 34%, var(--color-border-strong));
+	box-shadow:
+		0 10px 22px color-mix(in srgb, var(--color-accent) 8%, transparent),
+		var(--shadow-md);
+}
+
+.card:focus-visible {
+	outline: 2px solid color-mix(in srgb, var(--color-accent) 54%, transparent);
+	outline-offset: 2px;
+	border-color: color-mix(in srgb, var(--color-accent) 26%, var(--color-border-strong));
+	box-shadow: var(--shadow-md);
+}
+
+.cardHeader {
+	display: flex;
+	align-items: center;
+	gap: var(--space-3);
+	position: relative;
+	z-index: 1;
+}
+
+.cardIconWrap {
+	width: 2.75rem;
+	height: 2.75rem;
+	display: inline-flex;
+	align-items: center;
+	justify-content: center;
+	border-radius: var(--radius-lg);
+	background: linear-gradient(180deg, color-mix(in srgb, var(--color-accent) 14%, transparent), color-mix(in srgb, var(--color-accent-soft) 22%, transparent));
+	color: var(--color-text-primary);
+	border: 1px solid color-mix(in srgb, var(--color-accent) 16%, var(--color-border-subtle));
+	box-shadow:
+		inset 0 1px 0 color-mix(in srgb, white 8%, transparent),
+		0 6px 14px color-mix(in srgb, var(--color-accent) 7%, transparent);
+}
+
+.cardBody {
+	display: grid;
+	gap: var(--space-2);
+	position: relative;
+	z-index: 1;
+}
+
+.cardTitle {
+	@include text-title;
+	line-height: 1.1;
+}
+
+.focusList li::marker {
+	color: color-mix(in srgb, var(--color-accent) 44%, var(--color-text-secondary));
+}
+
+.card:nth-child(2n) .cardIconWrap {
+	background: linear-gradient(180deg, color-mix(in srgb, #8b5cf6 14%, transparent), color-mix(in srgb, var(--color-accent-soft) 22%, transparent));
+	border-color: color-mix(in srgb, #8b5cf6 16%, var(--color-border-subtle));
+}
+
+.card:nth-child(3n) .cardIconWrap {
+	background: linear-gradient(180deg, color-mix(in srgb, #06b6d4 12%, transparent), color-mix(in srgb, var(--color-accent) 18%, transparent));
+	border-color: color-mix(in srgb, #06b6d4 14%, var(--color-border-subtle));
+}
+
+@media (max-width: 64rem) {
+	.cardGrid {
+		grid-template-columns: 1fr;
+	}
+}
+
+@media (max-width: 48rem) {
+	.viewport {
+		padding-top: var(--space-4);
+		padding-right: var(--space-4);
+		padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
+		padding-left: var(--space-4);
+	}
+
+	.hero,
+	.sectionStack {
+		padding-inline: var(--space-4);
+	}
+
+	.heroCopy,
+	.card {
+		padding: var(--space-4);
+	}
+
+	.cardHeader {
+		align-items: flex-start;
+	}
+
+	.title {
+		max-width: none;
+	}
+}

Frontend/src/components/settings/SettingsWorkspace/SettingsWorkspace.tsx

@@ -0,0 +1,95 @@
+// Path: Frontend/src/components/settings/SettingsWorkspace/SettingsWorkspace.tsx
+
+import { A } from "@solidjs/router";
+import { For, type JSX } from "solid-js";
+import { Bell, Home, Moon, Shield, Settings, User } from "../../../lib/icons";
+import { getSettingsSectionRoute } from "../../app-shell/data/workspace-routes";
+import styles from "./SettingsWorkspace.module.scss";
+
+const sections = [
+	{
+		title: "Account Settings",
+		description: "Profile, identity, and account preferences for the active user.",
+		icon: User,
+		href: getSettingsSectionRoute("account"),
+		focus: ["Profile", "Notifications", "Personal defaults"],
+	},
+	{
+		title: "Workspace Settings",
+		description: "Core workspace behavior mapped to the project-level `settings.cbor` surface.",
+		icon: Home,
+		href: getSettingsSectionRoute("workspace"),
+		focus: ["Navigation defaults", "Workspace behavior", "Content rules"],
+	},
+	{
+		title: "Server Settings",
+		description: "Organization and server-wide controls that should live above individual workspaces.",
+		icon: Settings,
+		href: getSettingsSectionRoute("server"),
+		focus: ["Server identity", "Policies", "Operational defaults"],
+	},
+	{
+		title: "Theme Settings",
+		description: "Theme preferences and presentation settings that should eventually map cleanly to POSIX-backed configuration.",
+		icon: Moon,
+		href: getSettingsSectionRoute("theme"),
+		focus: ["Theme preset", "Density", "Visual preferences"],
+	},
+	{
+		title: "Security Settings",
+		description: "Authentication, sessions, and access hardening for users and organizations.",
+		icon: Shield,
+		href: getSettingsSectionRoute("security"),
+		focus: ["Sessions", "Access controls", "Recovery"],
+	},
+	{
+		title: "Members & Roles",
+		description: "People, invitations, and organization-level permission management.",
+		icon: Bell,
+		href: getSettingsSectionRoute("members"),
+		focus: ["Members", "Roles", "Invitations"],
+	},
+] as const;
+
+export const SettingsWorkspace = (): JSX.Element => {
+	return (
+		<main class={styles.viewport} data-ui="workspace-settings-page">
+			<section class={styles.hero}>
+				<div class={styles.heroCopy}>
+					<h1 class={styles.title}>Settings</h1>
+				</div>
+			</section>
+
+			<section class={styles.sectionStack}>
+				<section class={styles.section}>
+					<div class={styles.cardGrid}>
+						<For each={sections}>
+							{(section) => {
+								const Icon = section.icon;
+
+								return (
+									<A class={styles.card} href={section.href}>
+										<div class={styles.cardHeader}>
+											<div class={styles.cardIconWrap}>
+												<Icon size={18} strokeWidth={2} />
+											</div>
+										</div>
+
+										<div class={styles.cardBody}>
+											<h3 class={styles.cardTitle}>{section.title}</h3>
+											<p class={styles.cardDescription}>{section.description}</p>
+
+											<ul class={styles.focusList}>
+												<For each={section.focus}>{(focus) => <li>{focus}</li>}</For>
+											</ul>
+										</div>
+									</A>
+								);
+							}}
+						</For>
+					</div>
+				</section>
+			</section>
+		</main>
+	);
+};

Frontend/src/components/settings/ThemeSettingsPage/ThemeSettingsPage.module.scss

@@ -0,0 +1,234 @@
+// Path: Frontend/src/components/settings/ThemeSettingsPage/ThemeSettingsPage.module.scss
+
+.viewport {
+	width: 100%;
+	max-width: min(80rem, 100%);
+	min-height: 100%;
+	padding: var(--space-5) var(--space-6) calc(var(--space-7) + env(safe-area-inset-bottom));
+	box-sizing: border-box;
+	display: grid;
+	gap: var(--space-5);
+	align-content: start;
+}
+
+.hero,
+.card,
+.errorBanner {
+	border: 1px solid var(--color-border-subtle);
+	border-radius: var(--radius-xl);
+	background: var(--color-surface-raised);
+	box-shadow: var(--shadow-sm);
+}
+
+.hero {
+	padding: var(--space-6);
+	display: flex;
+	align-items: center;
+	gap: var(--space-4);
+	border-color: color-mix(in srgb, var(--color-accent) 20%, var(--color-border-subtle));
+	box-shadow:
+		0 10px 24px color-mix(in srgb, var(--color-accent) 8%, transparent),
+		var(--shadow-sm);
+}
+
+.heroIcon {
+	width: 3rem;
+	height: 3rem;
+	display: inline-flex;
+	align-items: center;
+	justify-content: center;
+	border-radius: var(--radius-lg);
+	background: linear-gradient(
+		180deg,
+		color-mix(in srgb, var(--color-accent) 14%, transparent),
+		color-mix(in srgb, var(--color-accent-soft) 22%, transparent)
+	);
+	border: 1px solid color-mix(in srgb, var(--color-accent) 16%, var(--color-border-subtle));
+	box-shadow:
+		inset 0 1px 0 color-mix(in srgb, white 8%, transparent),
+		0 6px 14px color-mix(in srgb, var(--color-accent) 7%, transparent);
+	color: var(--color-text-primary);
+	flex: 0 0 auto;
+}
+
+.heroCopy {
+	display: grid;
+	gap: var(--space-2);
+}
+
+.title,
+.cardTitle {
+	margin: 0;
+	color: var(--color-text-primary);
+}
+
+.title {
+	@include text-display;
+	line-height: 1.02;
+	letter-spacing: -0.02em;
+}
+
+.description,
+.cardDescription,
+.errorBanner {
+	margin: 0;
+	color: var(--color-text-secondary);
+	@include text-body;
+}
+
+.errorBanner {
+	padding: var(--space-4) var(--space-5);
+	border-color: color-mix(in srgb, #ef4444 24%, var(--color-border-subtle));
+	color: color-mix(in srgb, #ef4444 64%, var(--color-text-primary));
+}
+
+.grid {
+	display: grid;
+	grid-template-columns: repeat(2, minmax(0, 1fr));
+	gap: var(--space-4);
+}
+
+.card {
+	padding: var(--space-4);
+	display: grid;
+	gap: var(--space-4);
+	text-align: left;
+	color: inherit;
+	cursor: pointer;
+	transition:
+		transform 120ms ease,
+		border-color 120ms ease,
+		box-shadow 120ms ease;
+}
+
+.card:hover:not(:disabled) {
+	transform: translateY(-1px);
+	border-color: color-mix(in srgb, var(--color-accent) 28%, var(--color-border-strong));
+	box-shadow:
+		0 10px 22px color-mix(in srgb, var(--color-accent) 8%, transparent),
+		var(--shadow-md);
+}
+
+.card:focus-visible {
+	outline: 2px solid color-mix(in srgb, var(--color-accent) 54%, transparent);
+	outline-offset: 2px;
+}
+
+.card:disabled {
+	cursor: default;
+}
+
+.cardSelected {
+	border-color: color-mix(in srgb, var(--color-accent) 32%, var(--color-border-strong));
+	box-shadow:
+		0 10px 22px color-mix(in srgb, var(--color-accent) 10%, transparent),
+		var(--shadow-md);
+}
+
+.preview {
+	border-radius: var(--radius-lg);
+	overflow: hidden;
+	border: 1px solid var(--color-border-subtle);
+	background: var(--color-surface);
+	min-height: 9.5rem;
+}
+
+.previewCanvas {
+	height: 100%;
+	min-height: 9.5rem;
+	padding: 0.8rem;
+	box-sizing: border-box;
+	display: grid;
+	grid-template-rows: auto 1fr;
+	gap: 0.75rem;
+}
+
+.previewTopbar {
+	height: 0.65rem;
+	border-radius: 999px;
+	opacity: 0.9;
+}
+
+.previewSurface {
+	border-radius: calc(var(--radius-lg) - 0.25rem);
+	padding: 0.9rem;
+	display: grid;
+	align-content: start;
+	gap: 0.55rem;
+	box-shadow: inset 0 1px 0 color-mix(in srgb, white 6%, transparent);
+}
+
+.previewChip {
+	width: 2.8rem;
+	height: 0.55rem;
+	border-radius: 999px;
+	opacity: 0.95;
+}
+
+.previewLine,
+.previewLineShort {
+	height: 0.5rem;
+	border-radius: 999px;
+	background: color-mix(in srgb, var(--color-text-primary) 10%, transparent);
+}
+
+.previewLineShort {
+	width: 58%;
+}
+
+.cardBody {
+	display: grid;
+	gap: var(--space-2);
+}
+
+.cardHeader {
+	display: flex;
+	align-items: center;
+	justify-content: space-between;
+	gap: var(--space-3);
+}
+
+.cardTitle {
+	@include text-title;
+	line-height: 1.1;
+}
+
+.badge {
+	padding: 0.25rem 0.55rem;
+	border-radius: 999px;
+	border: 1px solid color-mix(in srgb, var(--color-accent) 18%, var(--color-border-subtle));
+	background: color-mix(in srgb, var(--color-accent) 10%, transparent);
+	color: color-mix(in srgb, var(--color-accent) 44%, var(--color-text-primary));
+	@include text-label;
+	white-space: nowrap;
+}
+
+@media (max-width: 64rem) {
+	.grid {
+		grid-template-columns: 1fr;
+	}
+}
+
+@media (max-width: 48rem) {
+	.viewport {
+		padding: var(--space-4) var(--space-4) calc(var(--space-8) + env(safe-area-inset-bottom));
+	}
+
+	.hero,
+	.card {
+		padding: var(--space-4);
+	}
+
+	.hero {
+		align-items: flex-start;
+	}
+
+	.title {
+		max-width: none;
+	}
+
+	.cardHeader {
+		align-items: flex-start;
+		flex-direction: column;
+	}
+}

Frontend/src/components/settings/ThemeSettingsPage/ThemeSettingsPage.tsx

@@ -0,0 +1,129 @@
+// Path: Frontend/src/components/settings/ThemeSettingsPage/ThemeSettingsPage.tsx
+
+import { For, Show, createMemo, createSignal, type JSX } from "solid-js";
+import { resolveAPIBase } from "../../../lib/api";
+import { Moon } from "../../../lib/icons";
+import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import { applyThemePresetById, resolvePreferredThemePresetId } from "../../../helper/themeRuntime";
+import { themePresetMetas } from "../../../theme/presets";
+import styles from "./ThemeSettingsPage.module.scss";
+
+type SaveThemeResponse = {
+	data?: {
+		presetId?: string;
+	};
+	error?: { message?: string } | string;
+	message?: string;
+};
+
+export const ThemeSettingsPage = (): JSX.Element => {
+	const appShell = useAppShellData();
+	const [savingPresetId, setSavingPresetId] = createSignal<string | null>(null);
+	const [error, setError] = createSignal("");
+
+	const activePresetId = createMemo(() => {
+		return appShell.admin()?.themePresetId?.trim() || resolvePreferredThemePresetId();
+	});
+
+	const savePreset = async (presetId: string): Promise<void> => {
+		if (savingPresetId() || presetId === activePresetId()) {
+			return;
+		}
+
+		setSavingPresetId(presetId);
+		setError("");
+
+		try {
+			const response = await fetch(`${resolveAPIBase()}/settings/theme`, {
+				method: "PUT",
+				headers: {
+					"Content-Type": "application/json",
+					Accept: "application/json",
+				},
+				body: JSON.stringify({ presetId }),
+			});
+
+			const body = (await response.json().catch(() => ({}))) as SaveThemeResponse;
+			const errorMessage =
+				typeof body.message === "string"
+					? body.message
+					: typeof body.error === "string"
+						? body.error
+						: body.error?.message;
+
+			if (!response.ok) {
+				throw new Error(errorMessage || "Failed to save theme preset.");
+			}
+
+			await applyThemePresetById(presetId);
+			await appShell.reload();
+		} catch (saveError) {
+			setError(saveError instanceof Error ? saveError.message : "Failed to save theme preset.");
+		} finally {
+			setSavingPresetId(null);
+		}
+	};
+
+	return (
+		<main class={styles.viewport}>
+			<section class={styles.hero}>
+				<div class={styles.heroIcon}>
+					<Moon size={18} strokeWidth={2} />
+				</div>
+				<div class={styles.heroCopy}>
+					<h1 class={styles.title}>Theme Settings</h1>
+					<p class={styles.description}>Pick the theme preset for your account.</p>
+				</div>
+			</section>
+
+			<Show when={error()}>
+				<div class={styles.errorBanner} role="alert">
+					{error()}
+				</div>
+			</Show>
+
+			<section class={styles.grid}>
+				<For each={themePresetMetas}>
+					{(preset) => {
+						const isSelected = () => activePresetId() === preset.id;
+						const isSaving = () => savingPresetId() === preset.id;
+
+						return (
+							<button
+								type="button"
+								classList={{
+									[styles.card]: true,
+									[styles.cardSelected]: isSelected(),
+								}}
+								onClick={() => void savePreset(preset.id)}
+								disabled={Boolean(savingPresetId())}
+								aria-pressed={isSelected()}
+							>
+								<div class={styles.preview} aria-hidden="true">
+									<div class={styles.previewCanvas} style={{ background: preset.preview.canvas }}>
+										<div class={styles.previewTopbar} style={{ background: preset.preview.accent }} />
+										<div class={styles.previewSurface} style={{ background: preset.preview.surface }}>
+											<div class={styles.previewChip} style={{ background: preset.preview.accent }} />
+											<div class={styles.previewLine} />
+											<div class={styles.previewLineShort} />
+										</div>
+									</div>
+								</div>
+
+								<div class={styles.cardBody}>
+									<div class={styles.cardHeader}>
+										<h2 class={styles.cardTitle}>{preset.name}</h2>
+										<Show when={isSelected() || isSaving()}>
+											<span class={styles.badge}>{isSaving() ? "Saving..." : "Current"}</span>
+										</Show>
+									</div>
+									<p class={styles.cardDescription}>{preset.description}</p>
+								</div>
+							</button>
+						);
+					}}
+				</For>
+			</section>
+		</main>
+	);
+};

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

@@ -1,6 +1,8 @@
+import { useNavigate } from "@solidjs/router";
 import { For, type JSX } from "solid-js";
 import { User } from "../../../lib/icons";
 import { useAppShellData } from "../../app-shell/data/app-shell.context";
+import { getWorkspaceSurfaceRoute } from "../../app-shell/data/workspace-routes";
 import { profileMenuSections } from "../../app-shell/data/shell.data";
 import styles from "./ProfileMenu.module.scss";
 
@@ -14,8 +16,17 @@ type ProfileMenuProps = {
 export const ProfileMenu = (props: ProfileMenuProps): JSX.Element => {
 	const variant = props.variant ?? "popover";
 	const appShellData = useAppShellData();
+	const navigate = useNavigate();
 	const activeUserProfile = () => appShellData.activeUserProfile();
 
+	const handleSelect = (actionId: string): void => {
+		if (actionId === "account-settings" || actionId === "security" || actionId === "theme-preferences") {
+			navigate(getWorkspaceSurfaceRoute("settings"));
+		}
+
+		props.onSelect();
+	};
+
 	return (
 		<div
 			id={props.id}
@@ -61,11 +72,11 @@ export const ProfileMenu = (props: ProfileMenuProps): JSX.Element => {
 											[styles.item]: true,
 											[styles.itemDanger]: item.tone === "danger",
 										}}
-										data-slot="profile-action"
-										data-action-id={item.id}
-										data-tone={item.tone ?? "default"}
-										onClick={props.onSelect}
-										>
+									data-slot="profile-action"
+									data-action-id={item.id}
+									data-tone={item.tone ?? "default"}
+									onClick={() => handleSelect(item.id)}
+									>
 											<span class={styles.itemIcon} aria-hidden="true">
 												<Icon size={16} strokeWidth={2} />
 											</span>

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

@@ -1,8 +1,10 @@
 // Path: Frontend/src/components/workspace-navigation/MobileWorkspaceBrowser/MobileWorkspaceBrowser.parts.tsx
 
+import { useLocation, useNavigate } from "@solidjs/router";
 import { For, Show, type JSX } from "solid-js";
 import { ChevronRight } from "../../../lib/icons";
 import { createLongPressGesture } from "../../../helper/createLongPressGesture";
+import { getWorkspaceSurfaceRoute } from "../../app-shell/data/workspace-routes";
 import {
 	createWorkspaceStaticTarget,
 	createWorkspaceTreeTarget,
@@ -72,8 +74,12 @@ export const StaticRow = (props: { item: SidebarItem }): JSX.Element => {
 export const WorkspaceStaticRow = (props: {
 	item: WorkspaceStaticItem;
 	onOpenActionSheet: (target: WorkspaceContextMenuTarget) => void;
+	onSelect: VoidFunction;
 }): JSX.Element => {
+	const navigate = useNavigate();
+	const location = useLocation();
 	const target = createWorkspaceStaticTarget(props.item);
+	const isActive = (): boolean => location.pathname === getWorkspaceSurfaceRoute(props.item.contextKind);
 	const longPress = createLongPressGesture({
 		onLongPress: () => {
 			props.onOpenActionSheet(target);
@@ -84,16 +90,20 @@ export const WorkspaceStaticRow = (props: {
 		<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>
-	);
+				data-target-kind={target.kind}
+				onContextMenu={(event): void => {
+					event.preventDefault();
+					props.onOpenActionSheet(target);
+				}}
+				onClick={(): void => {
+					navigate(getWorkspaceSurfaceRoute(props.item.contextKind));
+					props.onSelect();
+				}}
+				{...longPress}
+			>
+				<StaticRow item={{ ...props.item, active: isActive() }} />
+			</li>
+		);
 };
 
 export const WorkspaceTreeBranch = (props: {

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

@@ -72,12 +72,14 @@ export const MobileWorkspaceBrowser = (props: MobileWorkspaceBrowserProps): JSX.
 					<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>
+						<ul class={styles.treeList} data-slot="mobile-workspace-list" data-section-id="workspace">
+							<For each={workspaceStaticItems}>
+								{(item): JSX.Element => (
+									<WorkspaceStaticRow item={item} onOpenActionSheet={openActionSheet} onSelect={props.onClose} />
+								)}
+							</For>
+						</ul>
+					</section>
 
 						<section class={styles.sectionBlock} data-slot="mobile-workspace-section" data-section-id="items">
 							<span class={styles.sectionLabel}>Items</span>

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

@@ -1,7 +1,9 @@
 // Path: Frontend/src/components/workspace-navigation/WorkspaceSidebar/WorkspaceSidebar.parts.tsx
 
+import { useLocation, useNavigate } from "@solidjs/router";
 import { For, Show, type JSX } from "solid-js";
 import { ChevronRight, Folder } from "../../../lib/icons";
+import { getWorkspaceSurfaceRoute } from "../../app-shell/data/workspace-routes";
 import {
 	createWorkspaceStaticTarget,
 	createWorkspaceTreeTarget,
@@ -66,8 +68,11 @@ export const WorkspaceHomeEntry = (props: {
 	onOpenContextMenu: (event: MouseEvent, target: WorkspaceContextMenuTarget) => void;
 	onOpenContextMenuFromKeyboard: (element: HTMLElement, target: WorkspaceContextMenuTarget) => void;
 }): JSX.Element => {
+	const navigate = useNavigate();
+	const location = useLocation();
 	const Icon = props.item.icon;
 	const target = createWorkspaceStaticTarget(props.item);
+	const isActive = (): boolean => location.pathname === getWorkspaceSurfaceRoute(props.item.contextKind);
 
 	return (
 		<li>
@@ -75,14 +80,17 @@ export const WorkspaceHomeEntry = (props: {
 				type="button"
 				classList={{
 					[styles.navItem]: true,
-					[styles.navItemActive]: !!props.item.active,
+					[styles.navItemActive]: isActive(),
 				}}
-				aria-current={props.item.active ? "page" : undefined}
+				aria-current={isActive() ? "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"}
+				data-active={isActive() ? "true" : "false"}
+				onClick={(): void => {
+					navigate(getWorkspaceSurfaceRoute(props.item.contextKind));
+				}}
 				onContextMenu={(event): void => {
 					event.stopPropagation();
 					props.onOpenContextMenu(event, target);

Frontend/src/helper/themeRuntime.ts

@@ -36,6 +36,29 @@ const persistThemePreset = (themeDefinition: ThemeDefinition): void => {
 	localStorage.setItem(THEME_PRESET_STORAGE_KEY, themeDefinition.id);
 };
 
+const fetchThemeDefinitionByPresetId = async (presetId: string): Promise<ThemeDefinition | null> => {
+	const themePath = resolveThemePresetPath(presetId) ?? defaultThemePresetPath;
+
+	const response = await fetch(themePath, {
+		headers: {
+			Accept: "application/json",
+		},
+	});
+
+	if (!response.ok) {
+		throw new Error(`Theme preset request failed with status ${response.status}.`);
+	}
+
+	const candidate = (await response.json()) as unknown;
+	const result = validateThemeDefinition(candidate);
+
+	if (!result.success) {
+		throw new Error(result.errors.join(" "));
+	}
+
+	return result.data;
+};
+
 const setDocumentThemeMode = (theme: Theme): void => {
 	const rootElement = getRootElement();
 
@@ -111,6 +134,21 @@ export const resolvePreferredThemePresetPath = (): string => {
 	return resolveThemePresetPath(presetId) ?? defaultThemePresetPath;
 };
 
+export const applyThemePresetById = async (presetId: string, theme: Theme = getDocumentTheme()): Promise<ThemeDefinition | null> => {
+	try {
+		const definition = await fetchThemeDefinitionByPresetId(presetId);
+		if (!definition) {
+			return null;
+		}
+
+		applyThemeDefinition(definition, theme);
+		return definition;
+	} catch (error) {
+		console.error("Failed to apply theme preset.", error);
+		return null;
+	}
+};
+
 export const initializeThemeRuntime = async (): Promise<ThemeDefinition | null> => {
 	if (typeof window === "undefined") {
 		return null;
@@ -124,26 +162,7 @@ export const initializeThemeRuntime = async (): Promise<ThemeDefinition | null>
 	if (!themeInitializationPromise) {
 		themeInitializationPromise = (async (): Promise<ThemeDefinition | null> => {
 			try {
-				const response = await fetch(resolvePreferredThemePresetPath(), {
-					headers: {
-						Accept: "application/json",
-					},
-				});
-
-				if (!response.ok) {
-					throw new Error(`Theme preset request failed with status ${response.status}.`);
-				}
-
-				const candidate = (await response.json()) as unknown;
-				const result = validateThemeDefinition(candidate);
-
-				if (!result.success) {
-					throw new Error(result.errors.join(" "));
-				}
-
-				applyThemeDefinition(result.data, getDocumentTheme());
-
-				return result.data;
+				return await applyThemePresetById(resolvePreferredThemePresetId(), getDocumentTheme());
 			} catch (error) {
 				console.error("Failed to initialize theme runtime.", error);
 				return null;

Frontend/src/routes/index.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/index.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const IndexRoute = (): JSX.Element => {
+	return <Navigate href="/workspace/home" />;
+};
+
+export default IndexRoute;

Frontend/src/routes/settings.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/settings.tsx
+
+import type { RouteSectionProps } from "@solidjs/router";
+import { AppShell } from "../components/app-shell/AppShell/AppShell";
+
+const SettingsLayoutRoute = (props: RouteSectionProps) => {
+	return <AppShell>{props.children}</AppShell>;
+};
+
+export default SettingsLayoutRoute;

Frontend/src/routes/settings/account.tsx

@@ -0,0 +1,16 @@
+// Path: Frontend/src/routes/settings/account.tsx
+
+import { type JSX } from "solid-js";
+import { SettingsDetailPage } from "../../components/settings/SettingsDetailPage/SettingsDetailPage";
+
+const SettingsAccountRoute = (): JSX.Element => {
+	return (
+		<SettingsDetailPage
+			title="Account Settings"
+			description="Manage the active user account, profile details, notifications, and personal defaults."
+			focus={["Profile", "Notifications", "Personal defaults"]}
+		/>
+	);
+};
+
+export default SettingsAccountRoute;

Frontend/src/routes/settings/index.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/settings/index.tsx
+
+import { type JSX } from "solid-js";
+import { SettingsWorkspace } from "../../components/settings/SettingsWorkspace/SettingsWorkspace";
+
+const SettingsIndexRoute = (): JSX.Element => {
+	return <SettingsWorkspace />;
+};
+
+export default SettingsIndexRoute;

Frontend/src/routes/settings/members.tsx

@@ -0,0 +1,16 @@
+// Path: Frontend/src/routes/settings/members.tsx
+
+import { type JSX } from "solid-js";
+import { SettingsDetailPage } from "../../components/settings/SettingsDetailPage/SettingsDetailPage";
+
+const SettingsMembersRoute = (): JSX.Element => {
+	return (
+		<SettingsDetailPage
+			title="Members & Roles"
+			description="Manage people, invitations, roles, and permission assignments across the organization structure."
+			focus={["Members", "Roles", "Invitations"]}
+		/>
+	);
+};
+
+export default SettingsMembersRoute;

Frontend/src/routes/settings/security.tsx

@@ -0,0 +1,16 @@
+// Path: Frontend/src/routes/settings/security.tsx
+
+import { type JSX } from "solid-js";
+import { SettingsDetailPage } from "../../components/settings/SettingsDetailPage/SettingsDetailPage";
+
+const SettingsSecurityRoute = (): JSX.Element => {
+	return (
+		<SettingsDetailPage
+			title="Security Settings"
+			description="Review sessions, access controls, and account recovery settings for users and organizations."
+			focus={["Sessions", "Access controls", "Recovery"]}
+		/>
+	);
+};
+
+export default SettingsSecurityRoute;

Frontend/src/routes/settings/server.tsx

@@ -0,0 +1,16 @@
+// Path: Frontend/src/routes/settings/server.tsx
+
+import { type JSX } from "solid-js";
+import { SettingsDetailPage } from "../../components/settings/SettingsDetailPage/SettingsDetailPage";
+
+const SettingsServerRoute = (): JSX.Element => {
+	return (
+		<SettingsDetailPage
+			title="Server Settings"
+			description="Manage server-wide controls, identity, and policy defaults that apply across workspaces."
+			focus={["Server identity", "Policies", "Operational defaults"]}
+		/>
+	);
+};
+
+export default SettingsServerRoute;

Frontend/src/routes/settings/theme.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/settings/theme.tsx
+
+import { type JSX } from "solid-js";
+import { ThemeSettingsPage } from "../../components/settings/ThemeSettingsPage/ThemeSettingsPage";
+
+const SettingsThemeRoute = (): JSX.Element => {
+	return <ThemeSettingsPage />;
+};
+
+export default SettingsThemeRoute;

Frontend/src/routes/settings/workspace.tsx

@@ -0,0 +1,16 @@
+// Path: Frontend/src/routes/settings/workspace.tsx
+
+import { type JSX } from "solid-js";
+import { SettingsDetailPage } from "../../components/settings/SettingsDetailPage/SettingsDetailPage";
+
+const SettingsWorkspaceRoute = (): JSX.Element => {
+	return (
+		<SettingsDetailPage
+			title="Workspace Settings"
+			description="Control workspace-level behavior, structure defaults, and the way content behaves inside this workspace."
+			focus={["Navigation defaults", "Workspace behavior", "Content rules"]}
+		/>
+	);
+};
+
+export default SettingsWorkspaceRoute;

Frontend/src/routes/workspace.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace.tsx
+
+import type { RouteSectionProps } from "@solidjs/router";
+import { AppShell } from "../components/app-shell/AppShell/AppShell";
+
+const WorkspaceLayout = (props: RouteSectionProps) => {
+	return <AppShell>{props.children}</AppShell>;
+};
+
+export default WorkspaceLayout;

Frontend/src/routes/workspace/home.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/home.tsx
+
+import { type JSX } from "solid-js";
+import { WorkspaceHome } from "../../components/workspace-home/WorkspaceHome";
+
+const WorkspaceHomeRoute = (): JSX.Element => {
+	return <WorkspaceHome />;
+};
+
+export default WorkspaceHomeRoute;

Frontend/src/routes/workspace/index.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/index.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceIndexRoute = (): JSX.Element => {
+	return <Navigate href="/workspace/home" />;
+};
+
+export default WorkspaceIndexRoute;

Frontend/src/routes/workspace/settings.tsx

@@ -0,0 +1,9 @@
+// Path: Frontend/src/routes/workspace/settings.tsx
+
+import type { RouteSectionProps } from "@solidjs/router";
+
+const WorkspaceSettingsLayoutRoute = (props: RouteSectionProps) => {
+	return props.children;
+};
+
+export default WorkspaceSettingsLayoutRoute;

Frontend/src/routes/workspace/settings/account.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/account.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsAccountRoute = (): JSX.Element => {
+	return <Navigate href="/settings/account" />;
+};
+
+export default WorkspaceSettingsAccountRoute;

Frontend/src/routes/workspace/settings/index.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/index.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsIndexRoute = (): JSX.Element => {
+	return <Navigate href="/settings" />;
+};
+
+export default WorkspaceSettingsIndexRoute;

Frontend/src/routes/workspace/settings/members.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/members.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsMembersRoute = (): JSX.Element => {
+	return <Navigate href="/settings/members" />;
+};
+
+export default WorkspaceSettingsMembersRoute;

Frontend/src/routes/workspace/settings/security.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/security.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsSecurityRoute = (): JSX.Element => {
+	return <Navigate href="/settings/security" />;
+};
+
+export default WorkspaceSettingsSecurityRoute;

Frontend/src/routes/workspace/settings/server.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/server.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsServerRoute = (): JSX.Element => {
+	return <Navigate href="/settings/server" />;
+};
+
+export default WorkspaceSettingsServerRoute;

Frontend/src/routes/workspace/settings/theme.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/theme.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsThemeRoute = (): JSX.Element => {
+	return <Navigate href="/settings/theme" />;
+};
+
+export default WorkspaceSettingsThemeRoute;

Frontend/src/routes/workspace/settings/workspace.tsx

@@ -0,0 +1,10 @@
+// Path: Frontend/src/routes/workspace/settings/workspace.tsx
+
+import { Navigate } from "@solidjs/router";
+import { type JSX } from "solid-js";
+
+const WorkspaceSettingsWorkspaceRoute = (): JSX.Element => {
+	return <Navigate href="/settings/workspace" />;
+};
+
+export default WorkspaceSettingsWorkspaceRoute;

Frontend/src/theme/presets.ts

@@ -8,14 +8,31 @@ export const themePresetMetas = [
 		name: "Moku Default",
 		description: "The baseline Moku theme preset, matching the original shell styling tokens.",
 		path: "/themes/moku-default.json",
+		preview: {
+			canvas: "hsl(210 20% 99%)",
+			surface: "hsl(0 0% 100%)",
+			accent: "hsl(221 83% 53%)",
+		},
 	},
 	{
 		id: "moku-midnight",
 		name: "Moku Midnight",
 		description: "The active warm, low-light Moku theme preset inspired by the Midnight Discord palette direction.",
 		path: "/themes/moku-midnight.json",
+		preview: {
+			canvas: "#282828",
+			surface: "hsl(20 8% 16%)",
+			accent: "#d3869b",
+		},
 	},
-] as const satisfies readonly (Pick<ThemeDefinition, "id" | "name" | "description"> & { path: string })[];
+] as const satisfies readonly (Pick<ThemeDefinition, "id" | "name" | "description"> & {
+	path: string;
+	preview: {
+		canvas: string;
+		surface: string;
+		accent: string;
+	};
+})[];
 
 export const defaultThemePresetPath = "/themes/moku-midnight.json";