feat: support uploading folders via drag-and-drop and toolbar button

components/files/file-browser.tsx

@@ -21,6 +21,7 @@ import { loadFilesSettings } from "@/components/files/files-settings-dialog";
 import type { FolderLayout } from "@/components/files/files-settings-dialog";
 import { FolderTreeSidebar } from "@/components/files/folder-tree-sidebar";
 import { ResizeHandle } from "@/components/layout/resize-handle";
+import { getDroppedFilesAndFolders } from "@/lib/webdav/drop-utils";
 import type { FileResource } from "@/stores/file-store";
 
 type SortKey = "name" | "size" | "modified";
@@ -624,16 +625,20 @@ export function FileBrowser({
     e.stopPropagation();
     setIsDraggingOver(false);
 
-    const files = Array.from(e.dataTransfer.files);
-    if (files.length > 0) {
-      setIsUploading(true);
-      try {
-        await onUploadFiles(files);
-      } finally {
-        setIsUploading(false);
+    setIsUploading(true);
+    try {
+      const { files, hasDirectories } = await getDroppedFilesAndFolders(e.dataTransfer);
+      if (files.length > 0) {
+        if (hasDirectories) {
+          await onUploadFolder(files);
+        } else {
+          await onUploadFiles(files);
+        }
       }
+    } finally {
+      setIsUploading(false);
     }
-  }, [onUploadFiles]);
+  }, [onUploadFiles, onUploadFolder]);
 
   const handleFileInputChange = async (e: React.ChangeEvent<HTMLInputElement>) => {
     const files = Array.from(e.target.files || []);
@@ -945,6 +950,16 @@ export function FileBrowser({
           >
             <Upload className="w-4 h-4" />
           </Button>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-8 w-8"
+            onClick={() => folderInputRef.current?.click()}
+            title={t("upload_folder")}
+            disabled={isUploading}
+          >
+            <FolderUp className="w-4 h-4" />
+          </Button>
           <Button
             variant="ghost"
             size="icon"
@@ -1195,6 +1210,14 @@ export function FileBrowser({
                 setIsUploading(false);
               }
             }}
+            onUploadFolder={async (files: File[]) => {
+              setIsUploading(true);
+              try {
+                await onUploadFolder(files);
+              } finally {
+                setIsUploading(false);
+              }
+            }}
             onCreateFolder={() => setShowNewFolder(true)}
             onCreateTextFile={() => setShowNewTextFile(true)}
           />

components/files/file-upload-area.tsx

@@ -2,16 +2,18 @@
 
 import { useCallback, useState } from "react";
 import { useTranslations } from "next-intl";
-import { Upload, FolderPlus, FilePlus } from "lucide-react";
+import { Upload, FolderPlus, FilePlus, FolderUp } from "lucide-react";
 import { Button } from "@/components/ui/button";
+import { getDroppedFilesAndFolders } from "@/lib/webdav/drop-utils";
 
 interface FileUploadAreaProps {
   onUpload: (files: File[]) => Promise<void>;
+  onUploadFolder?: (files: File[]) => Promise<void>;
   onCreateFolder: () => void;
   onCreateTextFile?: () => void;
 }
 
-export function FileUploadArea({ onUpload, onCreateFolder, onCreateTextFile }: FileUploadAreaProps) {
+export function FileUploadArea({ onUpload, onUploadFolder, onCreateFolder, onCreateTextFile }: FileUploadAreaProps) {
   const t = useTranslations("files");
   const [isDragging, setIsDragging] = useState(false);
 
@@ -32,11 +34,15 @@ export function FileUploadArea({ onUpload, onCreateFolder, onCreateTextFile }: F
     e.stopPropagation();
     setIsDragging(false);
 
-    const files = Array.from(e.dataTransfer.files);
+    const { files, hasDirectories } = await getDroppedFilesAndFolders(e.dataTransfer);
     if (files.length > 0) {
-      await onUpload(files);
+      if (hasDirectories && onUploadFolder) {
+        await onUploadFolder(files);
+      } else {
+        await onUpload(files);
+      }
     }
-  }, [onUpload]);
+  }, [onUpload, onUploadFolder]);
 
   return (
     <div className="flex items-center justify-center h-full p-8">

lib/webdav/drop-utils.ts

@@ -0,0 +1,126 @@
+/**
+ * Utilities for handling drag-and-drop of files and folders.
+ * Uses the File and Directory Entries API (webkitGetAsEntry) to
+ * recursively read dropped directory trees, preserving relative paths.
+ */
+
+interface FileWithPath extends File {
+  readonly webkitRelativePath: string;
+}
+
+/**
+ * Read all File entries from a FileSystemDirectoryEntry recursively.
+ * Each returned File has its webkitRelativePath set to the relative path
+ * within the dropped folder (e.g. "folder/sub/file.txt").
+ */
+function readDirectoryEntries(dirEntry: FileSystemDirectoryEntry): Promise<FileWithPath[]> {
+  return new Promise((resolve, reject) => {
+    const reader = dirEntry.createReader();
+    const allEntries: FileSystemEntry[] = [];
+
+    // readEntries may return results in batches; keep reading until empty
+    const readBatch = () => {
+      reader.readEntries(
+        (entries) => {
+          if (entries.length === 0) {
+            resolveFiles(allEntries).then(resolve, reject);
+          } else {
+            allEntries.push(...entries);
+            readBatch();
+          }
+        },
+        reject,
+      );
+    };
+    readBatch();
+  });
+}
+
+function resolveFiles(entries: FileSystemEntry[]): Promise<FileWithPath[]> {
+  const promises = entries.map((entry) => {
+    if (entry.isFile) {
+      return new Promise<FileWithPath[]>((resolve, reject) => {
+        (entry as FileSystemFileEntry).file(
+          (file) => {
+            // Set webkitRelativePath directly on the original File object.
+            // The property lives on File.prototype as a getter, so defining
+            // an own data property on the instance safely shadows it.
+            try {
+              Object.defineProperty(file, 'webkitRelativePath', {
+                value: entry.fullPath.replace(/^\//, ''),
+                writable: false,
+                configurable: true,
+              });
+            } catch {
+              // Fallback: some environments may prevent overriding.
+              // The store also falls back to file.name, which still works
+              // for flat files (though nested paths would be lost).
+            }
+            resolve([file as unknown as FileWithPath]);
+          },
+          reject,
+        );
+      });
+    } else if (entry.isDirectory) {
+      return readDirectoryEntries(entry as FileSystemDirectoryEntry);
+    }
+    return Promise.resolve([]);
+  });
+  return Promise.all(promises).then((arrays) => arrays.flat());
+}
+
+/**
+ * Result of processing a drop event's DataTransfer.
+ */
+export interface DropResult {
+  files: File[];
+  hasDirectories: boolean;
+}
+
+/**
+ * Process a drop event's DataTransfer, detecting folders and recursively
+ * reading their contents. Returns the list of files and whether any
+ * directories were found.
+ *
+ * Falls back to e.dataTransfer.files when webkitGetAsEntry is unavailable.
+ */
+export async function getDroppedFilesAndFolders(dataTransfer: DataTransfer): Promise<DropResult> {
+  const items = dataTransfer.items;
+
+  // Check if the browser supports webkitGetAsEntry
+  if (items && items.length > 0 && typeof items[0].webkitGetAsEntry === 'function') {
+    const entries: FileSystemEntry[] = [];
+    for (let i = 0; i < items.length; i++) {
+      const entry = items[i].webkitGetAsEntry();
+      if (entry) entries.push(entry);
+    }
+
+    let hasDirectories = false;
+    const filePromises: Promise<FileWithPath[]>[] = [];
+
+    for (const entry of entries) {
+      if (entry.isDirectory) {
+        hasDirectories = true;
+        filePromises.push(readDirectoryEntries(entry as FileSystemDirectoryEntry));
+      } else if (entry.isFile) {
+        filePromises.push(
+          new Promise<FileWithPath[]>((resolve, reject) => {
+            (entry as FileSystemFileEntry).file(
+              (file) => resolve([file as FileWithPath]),
+              reject,
+            );
+          }),
+        );
+      }
+    }
+
+    const allFiles = (await Promise.all(filePromises)).flat();
+    return { files: allFiles, hasDirectories };
+  }
+
+  // Fallback: no entry API support
+  return {
+    files: Array.from(dataTransfer.files),
+    hasDirectories: false,
+  };
+}

locales/de/common.json

@@ -2053,7 +2053,7 @@
     "file": "Datei",
     "parent_directory": "Übergeordnetes Verzeichnis",
     "breadcrumb_root": "Startseite",
-    "drop_files_here": "Dateien hier ablegen zum Hochladen",
+    "drop_files_here": "Dateien oder Ordner hier ablegen zum Hochladen",
     "uploading": "Wird hochgeladen...",
     "upload_success": "{count, plural, one {1 Datei hochgeladen} other {# Dateien hochgeladen}}",
     "upload_error": "Datei konnte nicht hochgeladen werden",

locales/en/common.json

@@ -2066,7 +2066,7 @@
     "file": "File",
     "parent_directory": "Parent directory",
     "breadcrumb_root": "Home",
-    "drop_files_here": "Drop files here to upload",
+    "drop_files_here": "Drop files or folders here to upload",
     "uploading": "Uploading...",
     "upload_success": "{count, plural, one {1 file uploaded} other {# files uploaded}}",
     "upload_error": "Failed to upload file",

locales/es/common.json

@@ -2053,7 +2053,7 @@
     "file": "Archivo",
     "parent_directory": "Directorio superior",
     "breadcrumb_root": "Inicio",
-    "drop_files_here": "Suelte los archivos aquí para subirlos",
+    "drop_files_here": "Suelte archivos o carpetas aquí para subirlos",
     "uploading": "Subiendo...",
     "upload_success": "{count, plural, one {1 archivo subido} other {# archivos subidos}}",
     "upload_error": "Error al subir el archivo",

locales/fr/common.json

@@ -2053,7 +2053,7 @@
     "file": "Fichier",
     "parent_directory": "Répertoire parent",
     "breadcrumb_root": "Accueil",
-    "drop_files_here": "Déposez les fichiers ici pour les téléverser",
+    "drop_files_here": "Déposez des fichiers ou dossiers ici pour les téléverser",
     "uploading": "Téléversement en cours...",
     "upload_success": "{count, plural, one {1 fichier téléversé} other {# fichiers téléversés}}",
     "upload_error": "Échec du téléversement du fichier",

locales/it/common.json

@@ -2053,7 +2053,7 @@
     "file": "File",
     "parent_directory": "Directory superiore",
     "breadcrumb_root": "Home",
-    "drop_files_here": "Trascina i file qui per caricarli",
+    "drop_files_here": "Trascina file o cartelle qui per caricarli",
     "uploading": "Caricamento in corso...",
     "upload_success": "{count, plural, one {1 file caricato} other {# file caricati}}",
     "upload_error": "Caricamento del file non riuscito",

locales/ja/common.json

@@ -2053,7 +2053,7 @@
     "file": "ファイル",
     "parent_directory": "親ディレクトリ",
     "breadcrumb_root": "ホーム",
-    "drop_files_here": "ここにファイルをドロップしてアップロード",
+    "drop_files_here": "ここにファイルまたはフォルダをドロップしてアップロード",
     "uploading": "アップロード中...",
     "upload_success": "{count, plural, other {#件のファイルをアップロードしました}}",
     "upload_error": "ファイルのアップロードに失敗しました",

locales/nl/common.json

@@ -2053,7 +2053,7 @@
     "file": "Bestand",
     "parent_directory": "Bovenliggende map",
     "breadcrumb_root": "Start",
-    "drop_files_here": "Sleep bestanden hierheen om te uploaden",
+    "drop_files_here": "Sleep bestanden of mappen hierheen om te uploaden",
     "uploading": "Uploaden...",
     "upload_success": "{count, plural, one {1 bestand geüpload} other {# bestanden geüpload}}",
     "upload_error": "Bestand uploaden mislukt",

locales/pt/common.json

@@ -2053,7 +2053,7 @@
     "file": "Ficheiro",
     "parent_directory": "Diretório superior",
     "breadcrumb_root": "Início",
-    "drop_files_here": "Largue os ficheiros aqui para carregar",
+    "drop_files_here": "Largue ficheiros ou pastas aqui para carregar",
     "uploading": "A carregar...",
     "upload_success": "{count, plural, one {1 ficheiro carregado} other {# ficheiros carregados}}",
     "upload_error": "Falha ao carregar o ficheiro",

stores/file-store.ts

@@ -371,10 +371,11 @@ export const useFileStore = create<FileState>((set, get) => ({
     }
 
     // Create directories as flat entries with prefixed names (no parentId nesting)
+    // Convert "/" separators from webkitRelativePath to PATH_SEP (∕) for server names
     const sortedDirs = [...dirs].sort((a, b) => a.split('/').length - b.split('/').length);
     for (const dir of sortedDirs) {
       if (abortController.signal.aborted) break;
-      const fullDirName = prefix + dir;
+      const fullDirName = prefix + dir.replace(/\//g, PATH_SEP);
       try {
         await client.createFileDirectory(fullDirName, null);
       } catch {
@@ -387,7 +388,7 @@ export const useFileStore = create<FileState>((set, get) => ({
       if (abortController.signal.aborted) break;
       const file = files[i];
       const relativePath = (file as File & { webkitRelativePath?: string }).webkitRelativePath || file.name;
-      const fullName = prefix + relativePath;
+      const fullName = prefix + relativePath.replace(/\//g, PATH_SEP);
 
       set({ uploadProgress: { name: relativePath, loaded: 0, total: file.size, current: i + 1, totalFiles } });