feat folder download as zip

src/components/FolderTree/FolderTree.tsx

@@ -12,7 +12,7 @@
  */
 
 import React, { useState, useCallback, useRef, useEffect, useMemo } from 'react';
-import { FaFolder, FaFolderOpen, FaPlus, FaPen, FaTrash, FaChevronRight, FaGlobe, FaSyncAlt } from 'react-icons/fa';
+import { FaFolder, FaFolderOpen, FaPlus, FaPen, FaTrash, FaChevronRight, FaGlobe, FaSyncAlt, FaDownload } from 'react-icons/fa';
 import styles from './FolderTree.module.css';
 
 /* ── Public types ──────────────────────────────────────────────────────── */
@@ -61,6 +61,7 @@ export interface FolderTreeProps {
   onDeleteFile?: (fileId: string) => Promise<void>;
   onDeleteFiles?: (fileIds: string[]) => Promise<void>;
   onDeleteFolders?: (folderIds: string[]) => Promise<void>;
+  onDownloadFolder?: (folderId: string, folderName: string) => Promise<void>;
 }
 
 /* ── Helpers ───────────────────────────────────────────────────────────── */
@@ -285,12 +286,14 @@ interface TreeNodeProps {
   onMoveFolders?: (folderIds: string[], targetParentId: string | null) => Promise<void>;
   onMoveFile?: (fileId: string, targetFolderId: string | null) => Promise<void>;
   onMoveFiles?: (fileIds: string[], targetFolderId: string | null) => Promise<void>;
+  onDownloadFolder?: (folderId: string, folderName: string) => Promise<void>;
 }
 
 function _TreeNode({
   node, depth, selectedFolderId, expandedIds, showFiles, filesByFolder, sel,
   onToggle, onSelect,
   onCreateFolder, onRenameFolder, onDeleteFolder, onMoveFolder, onMoveFolders, onMoveFile, onMoveFiles,
+  onDownloadFolder,
 }: TreeNodeProps) {
   const [renaming, setRenaming] = useState(false);
   const [renameValue, setRenameValue] = useState(node.name);
@@ -436,6 +439,11 @@ function _TreeNode({
           <span className={styles.folderName}>{node.name}</span>
         )}
         <span className={styles.actions}>
+          {onDownloadFolder && !(isMultiSelected && sel.selectedItemIds.size > 1) && (
+            <button className={styles.actionBtn} onClick={(e) => { e.stopPropagation(); onDownloadFolder(node.id, node.name); }} title="Ordner herunterladen (ZIP)">
+              <FaDownload />
+            </button>
+          )}
           {onCreateFolder && !(isMultiSelected && sel.selectedItemIds.size > 1) && (
             <button className={styles.actionBtn} onClick={_handleAdd} title="Neuer Unterordner">
               <FaPlus />
@@ -489,6 +497,7 @@ function _TreeNode({
               onMoveFolders={onMoveFolders}
               onMoveFile={onMoveFile}
               onMoveFiles={onMoveFiles}
+              onDownloadFolder={onDownloadFolder}
             />
           ))}
           {folderFiles.map((file) => (
@@ -507,7 +516,7 @@ export default function FolderTree({
   selectedItemIds: externalSelectedIds, onSelectionChange,
   expandedIds: externalExpandedIds, onToggleExpand,
   onCreateFolder, onRenameFolder, onDeleteFolder, onMoveFolder, onMoveFolders, onMoveFile, onMoveFiles,
-  onRenameFile, onDeleteFile, onDeleteFiles, onDeleteFolders, onRefresh,
+  onRenameFile, onDeleteFile, onDeleteFiles, onDeleteFolders, onRefresh, onDownloadFolder,
 }: FolderTreeProps) {
   const [internalExpandedIds, setInternalExpandedIds] = useState<Set<string>>(new Set());
   const [rootDropOver, setRootDropOver] = useState(false);
@@ -720,6 +729,7 @@ export default function FolderTree({
             onMoveFolders={onMoveFolders}
             onMoveFile={onMoveFile}
             onMoveFiles={onMoveFiles}
+            onDownloadFolder={onDownloadFolder}
           />
         ))}
         {rootFiles.map((file) => (

src/contexts/FileContext.tsx

@@ -28,6 +28,7 @@ interface FileContextType {
   handleMoveFile: (fileId: string, targetFolderId: string | null) => Promise<void>;
   handleMoveFiles: (fileIds: string[], targetFolderId: string | null) => Promise<void>;
   handleMoveFolders: (folderIds: string[], targetParentId: string | null) => Promise<void>;
+  handleDownloadFolder: (folderId: string, folderName: string) => Promise<void>;
   expandedFolderIds: Set<string>;
   toggleFolderExpanded: (id: string) => void;
 }
@@ -122,6 +123,24 @@ export function FileProvider({ children }: { children: React.ReactNode }) {
     await refreshFolders();
   }, [refreshFolders]);
 
+  const handleDownloadFolder = useCallback(async (folderId: string, folderName: string) => {
+    try {
+      const response = await api.get(`/api/files/folders/${folderId}/download`, {
+        responseType: 'blob',
+      });
+      const url = window.URL.createObjectURL(response.data);
+      const link = document.createElement('a');
+      link.href = url;
+      link.setAttribute('download', `${folderName}.zip`);
+      document.body.appendChild(link);
+      link.click();
+      link.remove();
+      window.URL.revokeObjectURL(url);
+    } catch (err) {
+      console.error('Failed to download folder:', err);
+    }
+  }, []);
+
   // ── File operations ────────────────────────────────────────────────────
 
   const handleFileUpload = useCallback(async (file: File, workflowId?: string) => {
@@ -174,6 +193,7 @@ export function FileProvider({ children }: { children: React.ReactNode }) {
         handleMoveFile,
         handleMoveFiles,
         handleMoveFolders,
+        handleDownloadFolder,
         expandedFolderIds,
         toggleFolderExpanded,
       }}

src/pages/basedata/FilesPage.tsx

@@ -77,6 +77,7 @@ export const FilesPage: React.FC = () => {
     handleMoveFolders,
     handleMoveFile,
     handleMoveFiles: contextMoveFiles,
+    handleDownloadFolder,
     expandedFolderIds,
     toggleFolderExpanded,
   } = useFileContext();
@@ -367,6 +368,7 @@ export const FilesPage: React.FC = () => {
             onDeleteFile={_handleDeleteTreeFile}
             onDeleteFiles={_handleDeleteTreeFiles}
             onDeleteFolders={_handleDeleteTreeFolders}
+            onDownloadFolder={handleDownloadFolder}
           />
         </div>
 

src/pages/views/workspace/FileBrowser.tsx

@@ -42,6 +42,7 @@ export const FileBrowser: React.FC<FileBrowserProps> = ({
     handleMoveFile,
     handleMoveFiles: contextMoveFiles,
     handleFileDelete,
+    handleDownloadFolder,
     expandedFolderIds,
     toggleFolderExpanded,
   } = useFileContext();
@@ -238,6 +239,7 @@ export const FileBrowser: React.FC<FileBrowserProps> = ({
         onDeleteFile={_onDeleteFile}
         onDeleteFiles={_onDeleteFiles}
         onDeleteFolders={_onDeleteFolders}
+        onDownloadFolder={handleDownloadFolder}
       />
 
       {_fileNodes.length === 0 && (