Implement move menu tree, hover tooltips, and custom icons

backend/handlers/files.go

@@ -37,6 +37,12 @@ type FileInfo struct {
 	Checksum  string    `json:"checksum,omitempty"`
 }
 
+type FolderNode struct {
+	Name     string        `json:"name"`
+	Path     string        `json:"path"`
+	Children []*FolderNode `json:"children"`
+}
+
 // ListDirectory returns the contents of a directory.
 // GET /api/files/*
 func (h *FSHandler) ListDirectory(c *fiber.Ctx) error {
@@ -127,6 +133,69 @@ func (h *FSHandler) ListDirectory(c *fiber.Ctx) error {
 	})
 }
 
+// GetFolderTree returns a hierarchical tree of all folders.
+// GET /api/files/folders-tree
+func (h *FSHandler) GetFolderTree(c *fiber.Ctx) error {
+	rootPath := h.Config.StorageDir
+	
+	root := &FolderNode{
+		Name:     "Home",
+		Path:     ".",
+		Children: make([]*FolderNode, 0),
+	}
+
+	nodeMap := make(map[string]*FolderNode)
+	nodeMap["."] = root
+
+	filepath.WalkDir(rootPath, func(path string, d os.DirEntry, err error) error {
+		if err != nil {
+			return nil
+		}
+		if !d.IsDir() {
+			return nil
+		}
+		
+		relPath, err := filepath.Rel(rootPath, path)
+		if err != nil || relPath == "." || relPath == "" {
+			return nil
+		}
+
+		base := filepath.Base(relPath)
+		if strings.HasPrefix(base, ".") {
+			return filepath.SkipDir
+		}
+
+		cleanPath := filepath.ToSlash(relPath)
+		parentPath := filepath.ToSlash(filepath.Dir(relPath))
+		
+		node := &FolderNode{
+			Name:     d.Name(),
+			Path:     cleanPath,
+			Children: make([]*FolderNode, 0),
+		}
+		nodeMap[cleanPath] = node
+
+		if parentNode, exists := nodeMap[parentPath]; exists {
+			parentNode.Children = append(parentNode.Children, node)
+		}
+
+		return nil
+	})
+
+	var sortNode func(node *FolderNode)
+	sortNode = func(node *FolderNode) {
+		sort.Slice(node.Children, func(i, j int) bool {
+			return strings.ToLower(node.Children[i].Name) < strings.ToLower(node.Children[j].Name)
+		})
+		for _, child := range node.Children {
+			sortNode(child)
+		}
+	}
+	sortNode(root)
+
+	return c.JSON(root)
+}
+
 func (h *FSHandler) getFileInfo(c *fiber.Ctx, absPath string) error {
 	info, err := os.Stat(absPath)
 	if err != nil {