Fix: add persisted project folder deletion

Backend/internal/bootstrap/service.go

@@ -192,12 +192,23 @@ type CreateProjectFolderInput struct {
 	Name           string
 }
 
+type DeleteProjectFolderInput struct {
+	ProjectID string
+	FolderID  string
+}
+
 type CreateProjectFolderResult struct {
 	ProjectID     string                         `json:"projectId"`
 	CreatedFolder ProjectHierarchyFolderRecord   `json:"createdFolder"`
 	Folders       []ProjectHierarchyFolderRecord `json:"folders"`
 }
 
+type DeleteProjectFolderResult struct {
+	ProjectID       string                         `json:"projectId"`
+	DeletedFolderID string                         `json:"deletedFolderId"`
+	Folders         []ProjectHierarchyFolderRecord `json:"folders"`
+}
+
 type projectHierarchyFolderRow struct {
 	Path       string
 	ParentPath string
@@ -898,6 +909,14 @@ func (service *Service) CreateProjectTreeFolder(ctx context.Context, input Creat
 	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) createProjectHierarchyFolder(
 	ctx context.Context,
 	input CreateProjectFolderInput,
@@ -935,6 +954,42 @@ func (service *Service) createProjectHierarchyFolder(
 	}, nil
 }
 
+func (service *Service) deleteProjectHierarchyFolder(
+	ctx context.Context,
+	input DeleteProjectFolderInput,
+	rootPath func(projectSlug string) string,
+	deleteOnDisk func(projectSlug, folderID string) (string, error),
+) (DeleteProjectFolderResult, error) {
+	project, err := service.loadProjectByID(ctx, strings.TrimSpace(input.ProjectID))
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	deletedFolderID, err := deleteOnDisk(project.Slug, input.FolderID)
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	if err := posixproj.NewProjector(service.db, service.posixRoot).Rebuild(ctx); err != nil {
+		return DeleteProjectFolderResult{}, fmt.Errorf("rebuild POSIX projection: %w", err)
+	}
+
+	folders, err := service.getProjectHierarchyFoldersByRootPath(ctx, project.ID, rootPath)
+	if err != nil {
+		return DeleteProjectFolderResult{}, err
+	}
+
+	if _, found := findProjectHierarchyFolder(folders, deletedFolderID); found {
+		return DeleteProjectFolderResult{}, fmt.Errorf("deleted project folder still present in projection")
+	}
+
+	return DeleteProjectFolderResult{
+		ProjectID:       project.ID,
+		DeletedFolderID: deletedFolderID,
+		Folders:         folders,
+	}, 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
@@ -1218,6 +1273,14 @@ func (service *Service) createProjectTreeFolderOnDisk(projectSlug, parentFolderI
 	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) createProjectFolderOnDisk(
 	projectSlug, parentFolderID, name string,
 	rootPathBuilder func(projectSlug string) string,
@@ -1294,6 +1357,45 @@ func (service *Service) createProjectFolderOnDisk(
 	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 buildProjectHierarchyFolderTree(rows []projectHierarchyFolderRow, rootParentPath string) []ProjectHierarchyFolderRecord {
 	if len(rows) == 0 {
 		return nil

Backend/internal/httpx/api_project_routes.go

@@ -17,6 +17,10 @@ type createProjectFolderRequest struct {
 	ParentFolderID string `json:"parentFolderId"`
 }
 
+type deleteProjectFolderRequest struct {
+	FolderID string `json:"folderId"`
+}
+
 func (routes apiRoutes) handleProjectFolders(w http.ResponseWriter, r *http.Request) {
 	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
 	if projectID == "" {
@@ -26,7 +30,7 @@ func (routes apiRoutes) handleProjectFolders(w http.ResponseWriter, r *http.Requ
 
 	folders, err := routes.bootstrapService().GetProjectHierarchyFolders(r.Context(), projectID)
 	if err != nil {
-		routes.writeProjectFolderError(w, r, err)
+		routes.writeProjectFolderError(w, r, err, "load")
 		return
 	}
 
@@ -66,7 +70,7 @@ func (routes apiRoutes) handleCreateProjectFolder(w http.ResponseWriter, r *http
 		Name:           payload.Name,
 	})
 	if err != nil {
-		routes.writeProjectFolderError(w, r, err)
+		routes.writeProjectFolderError(w, r, err, "persist")
 		return
 	}
 
@@ -79,6 +83,37 @@ func (routes apiRoutes) handleCreateProjectFolder(w http.ResponseWriter, r *http
 	})
 }
 
+func (routes apiRoutes) handleDeleteProjectFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload := decodeDeleteProjectFolderRequest(r)
+	if strings.TrimSpace(payload.FolderID) == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().DeleteProjectFolder(r.Context(), bootstrapservice.DeleteProjectFolderInput{
+		ProjectID: projectID,
+		FolderID:  payload.FolderID,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "delete")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-folder-delete",
+			"persisted": true,
+		},
+	})
+}
+
 func (routes apiRoutes) handleProjectTreeFolders(w http.ResponseWriter, r *http.Request) {
 	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
 	if projectID == "" {
@@ -88,7 +123,7 @@ func (routes apiRoutes) handleProjectTreeFolders(w http.ResponseWriter, r *http.
 
 	folders, err := routes.bootstrapService().GetProjectTreeFolders(r.Context(), projectID)
 	if err != nil {
-		routes.writeProjectFolderError(w, r, err)
+		routes.writeProjectFolderError(w, r, err, "load")
 		return
 	}
 
@@ -128,7 +163,7 @@ func (routes apiRoutes) handleCreateProjectTreeFolder(w http.ResponseWriter, r *
 		Name:           payload.Name,
 	})
 	if err != nil {
-		routes.writeProjectFolderError(w, r, err)
+		routes.writeProjectFolderError(w, r, err, "persist")
 		return
 	}
 
@@ -141,17 +176,54 @@ func (routes apiRoutes) handleCreateProjectTreeFolder(w http.ResponseWriter, r *
 	})
 }
 
-func (routes apiRoutes) writeProjectFolderError(w http.ResponseWriter, r *http.Request, err error) {
+func (routes apiRoutes) handleDeleteProjectTreeFolder(w http.ResponseWriter, r *http.Request) {
+	projectID := strings.TrimSpace(chi.URLParam(r, "projectId"))
+	if projectID == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Project ID is required.")
+		return
+	}
+
+	payload := decodeDeleteProjectFolderRequest(r)
+	if strings.TrimSpace(payload.FolderID) == "" {
+		WriteError(w, http.StatusBadRequest, RequestIDFromContext(r.Context()), "invalid_request", "Folder ID is required.")
+		return
+	}
+
+	result, err := routes.bootstrapService().DeleteProjectTreeFolder(r.Context(), bootstrapservice.DeleteProjectFolderInput{
+		ProjectID: projectID,
+		FolderID:  payload.FolderID,
+	})
+	if err != nil {
+		routes.writeProjectFolderError(w, r, err, "delete")
+		return
+	}
+
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": result,
+		"meta": map[string]any{
+			"resource":  "project-tree-folder-delete",
+			"persisted": true,
+		},
+	})
+}
+
+func (routes apiRoutes) 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())
 	default:
-		routes.cfg.Logger.Error("persist project folder", "error", err, "path", r.URL.Path)
-		message := "Failed to persist project folder."
+		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_persist_failed", message)
+		WriteError(w, http.StatusInternalServerError, RequestIDFromContext(r.Context()), "project_folder_"+operation+"_failed", message)
+	}
+}
+
+func decodeDeleteProjectFolderRequest(r *http.Request) deleteProjectFolderRequest {
+	return deleteProjectFolderRequest{
+		FolderID: strings.TrimSpace(r.URL.Query().Get("folderId")),
 	}
 }
 

Backend/internal/httpx/api_routes.go

@@ -36,8 +36,10 @@ func (routes apiRoutes) Register(router chi.Router) {
 		apiRouter.Route("/projects/{projectId}", func(projectRouter chi.Router) {
 			projectRouter.Get("/folders", routes.handleProjectFolders)
 			projectRouter.Post("/folders", routes.handleCreateProjectFolder)
+			projectRouter.Delete("/folders", routes.handleDeleteProjectFolder)
 			projectRouter.Get("/tree/folders", routes.handleProjectTreeFolders)
 			projectRouter.Post("/tree/folders", routes.handleCreateProjectTreeFolder)
+			projectRouter.Delete("/tree/folders", routes.handleDeleteProjectTreeFolder)
 		})
 
 		if routes.cfg.Config.IsDevelopment() {

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

@@ -658,28 +658,65 @@ export const ProjectSelector = (props: ProjectSelectorProps): JSX.Element => {
 		}
 	};
 
+	const deletePersistedFolder = async (folderId: string): Promise<void> => {
+		const projectId = selectedProject().id;
+		if (!folderId || !isUuidString(projectId)) {
+			return;
+		}
+
+		try {
+			const response = await fetch(
+				`${resolveAPIBase()}/projects/${projectId}/folders?folderId=${encodeURIComponent(folderId)}`,
+				{
+					method: "DELETE",
+					headers: {
+						Accept: "application/json",
+					},
+				},
+			);
+
+			const body = (await response.json()) as ProjectFoldersResponse;
+
+			if (!response.ok) {
+				throw new Error(body.message || "Failed to delete project folder.");
+			}
+
+			setPersistedFolders(readPersistedFolders(body));
+			setCollapsedFolderIds((current) => current.filter((id) => id !== folderId));
+		} catch (error) {
+			console.error(error);
+		}
+	};
+
 	const cancelPendingFolder = (): void => {
 		setPendingFolderDraft(null);
 		setPendingFolderName("");
 	};
 
 	const handleContextActionSelect = (action: { id: string; label: string }, target: ProjectMenuTarget): void => {
-		if (action.id !== "new-folder") {
-			return;
-		}
-
-			switch (target.kind) {
-			case "surface":
-				beginFolderDraft(null, 0);
+		switch (action.id) {
+			case "new-folder":
+				switch (target.kind) {
+					case "surface":
+						beginFolderDraft(null, 0);
+						return;
+					case "folder":
+						beginFolderDraft(target.id, (findTreeNodeDepth(projectTreeNodes(), target.id, projectTreeAdapter) ?? 0) + 1);
+						return;
+					case "project": {
+						const parentId = findTreeNodeLocation(projectTreeNodes(), target.id, projectTreeAdapter)?.parentId ?? null;
+						beginFolderDraft(parentId, parentId ? (findTreeNodeDepth(projectTreeNodes(), parentId, projectTreeAdapter) ?? 0) + 1 : 0);
+						return;
+					}
+				}
 				return;
-			case "folder":
-				beginFolderDraft(target.id, (findTreeNodeDepth(projectTreeNodes(), target.id, projectTreeAdapter) ?? 0) + 1);
+			case "delete-folder":
+				if (target.kind === "folder") {
+					void deletePersistedFolder(target.id);
+				}
 				return;
-			case "project": {
-				const parentId = findTreeNodeLocation(projectTreeNodes(), target.id, projectTreeAdapter)?.parentId ?? null;
-				beginFolderDraft(parentId, parentId ? (findTreeNodeDepth(projectTreeNodes(), parentId, projectTreeAdapter) ?? 0) + 1 : 0);
+			default:
 				return;
-			}
 		}
 	};
 

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

@@ -581,6 +581,36 @@ export const WorkspaceSidebar = (props: WorkspaceSidebarProps): JSX.Element => {
 		}
 	};
 
+	const deletePersistedFolder = async (folderId: string): Promise<void> => {
+		const projectId = activeProject()?.id ?? "";
+		if (!folderId || !projectId || !isUuidString(projectId)) {
+			return;
+		}
+
+		try {
+			const response = await fetch(
+				`${resolveAPIBase()}/projects/${projectId}/tree/folders?folderId=${encodeURIComponent(folderId)}`,
+				{
+					method: "DELETE",
+					headers: {
+						Accept: "application/json",
+					},
+				},
+			);
+
+			const body = (await response.json()) as WorkspaceFoldersResponse;
+
+			if (!response.ok) {
+				throw new Error(body.message || "Failed to delete project tree folder.");
+			}
+
+			setPersistedFolders(readPersistedWorkspaceFolders(body));
+			setCollapsedFolderIds((current) => current.filter((id) => id !== folderId));
+		} catch (error) {
+			console.error(error);
+		}
+	};
+
 	const cancelPendingFolder = (): void => {
 		setPendingFolderDraft(null);
 		setPendingFolderName("");
@@ -639,20 +669,27 @@ export const WorkspaceSidebar = (props: WorkspaceSidebarProps): JSX.Element => {
 	};
 
 	const handleContextActionSelect = (action: WorkspaceContextMenuAction, target: WorkspaceContextMenuTarget): void => {
-		if (action.id !== "new-folder") {
-			return;
-		}
-
-			switch (target.kind) {
-			case "workspace":
-			case "home":
-				beginFolderDraft(null, 0);
+		switch (action.id) {
+			case "new-folder":
+				switch (target.kind) {
+					case "workspace":
+					case "home":
+						beginFolderDraft(null, 0);
+						return;
+					case "folder":
+						beginFolderDraft(target.id, (findTreeNodeDepth(workspaceTreeNodes(), target.id, workspaceTreeAdapter) ?? 0) + 1);
+						return;
+					case "settings":
+					case "item":
+						return;
+				}
 				return;
-			case "folder":
-				beginFolderDraft(target.id, (findTreeNodeDepth(workspaceTreeNodes(), target.id, workspaceTreeAdapter) ?? 0) + 1);
+			case "delete-folder":
+				if (target.kind === "folder") {
+					void deletePersistedFolder(target.id);
+				}
 				return;
-			case "settings":
-			case "item":
+			default:
 				return;
 		}
 	};

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

@@ -597,6 +597,11 @@ const getProjectCreateActions = (): readonly ProjectContextMenuAction[] =>
 		{ id: "new-folder", label: "New folder" },
 	] as const;
 
+const getProjectFolderDangerActions = (): readonly ProjectContextMenuAction[] =>
+	[
+		{ id: "delete-folder", label: "Delete", shortcut: { modifiers: ["meta"], key: "delete" }, tone: "danger" },
+	] as const;
+
 export const createProjectSurfaceTarget = (label = "Projects"): ProjectMenuTarget => ({
 	id: "project-surface",
 	label,
@@ -643,6 +648,10 @@ export const getProjectContextMenuSections = (target: ProjectMenuTarget): readon
 					id: "create",
 					items: createActions,
 				},
+				{
+					id: "organize",
+					items: getProjectFolderDangerActions(),
+				},
 			] as const;
 		case "project":
 			return [