fix: readded new folder button to folder tree component

src/components/FormGenerator/FormGeneratorTree/FormGeneratorTree.tsx

@@ -3,7 +3,9 @@ import {
   FaChevronRight,
   FaUnlink,
   FaSyncAlt,
+  FaFolderPlus,
 } from 'react-icons/fa';
+import { usePrompt } from '../../../hooks/usePrompt';
 import type {
   TreeNode,
   TreeNodeProvider,
@@ -81,6 +83,15 @@ function _flatten<T>(
   return result;
 }
 
+function _resolveNewFolderParentId<T>(selectedIds: Set<string>, nodes: TreeNode<T>[]): string | null {
+  if (selectedIds.size !== 1) return null;
+  const id = [...selectedIds][0];
+  const node = nodes.find((n) => n.id === id);
+  if (!node) return null;
+  if (node.type === 'folder') return node.id;
+  return node.parentId ?? null;
+}
+
 function _collectDescendantIds<T>(nodeId: string, nodes: TreeNode<T>[]): string[] {
   const childMap = _buildChildMap(nodes);
   const result: string[] = [];
@@ -390,8 +401,10 @@ export function FormGeneratorTree<T = any>({
   onSelectionChange,
   onRefresh,
   onSendToChat,
+  allowCreateFolder = true,
   className,
 }: FormGeneratorTreeProps<T>) {
+  const { prompt, PromptDialog } = usePrompt();
   const [nodes, setNodes] = useState<TreeNode<T>[]>([]);
   const [expandedIds, setExpandedIds] = useState<Set<string>>(new Set());
   const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set());
@@ -577,6 +590,32 @@ export function FormGeneratorTree<T = any>({
     onRefresh?.();
   }, [_loadRoot, _updateSelection, onRefresh]);
 
+  const _handleNewFolder = useCallback(async () => {
+    if (ownership !== 'own' || !provider.createChild || !allowCreateFolder) return;
+    const parentId = _resolveNewFolderParentId(selectedIds, nodes);
+    if (provider.canCreate && !provider.canCreate(parentId)) return;
+    const name = await prompt('Neuer Ordnername:', { title: 'Neuer Ordner', placeholder: 'Ordnername' });
+    const trimmed = name?.trim();
+    if (!trimmed) return;
+    try {
+      const newNode = await provider.createChild(parentId, trimmed);
+      setNodes((prev) => [...prev, newNode]);
+      if (parentId) {
+        setExpandedIds((prev) => new Set(prev).add(parentId));
+      }
+    } catch {
+      await _handleRefresh();
+    }
+  }, [
+    ownership,
+    provider,
+    allowCreateFolder,
+    selectedIds,
+    nodes,
+    prompt,
+    _handleRefresh,
+  ]);
+
   const _handleDelete = useCallback(
     async (id: string) => {
       const node = nodes.find((n) => n.id === id);
@@ -801,6 +840,13 @@ export function FormGeneratorTree<T = any>({
 
   const totalNodeCount = nodes.filter((n) => n.parentId === null).length;
 
+  const showNewFolderButton =
+    Boolean(title) &&
+    ownership === 'own' &&
+    allowCreateFolder &&
+    Boolean(provider.createChild) &&
+    (provider.canCreate?.(_resolveNewFolderParentId(selectedIds, nodes)) ?? true);
+
   const wrapperClasses = [
     styles.formGeneratorTree,
     compact && styles.compactMode,
@@ -825,6 +871,20 @@ export function FormGeneratorTree<T = any>({
           )}
           <span className={styles.sectionTitle}>{title}</span>
           <span className={styles.sectionCount}>{totalNodeCount}</span>
+          {showNewFolderButton && (
+            <button
+              className={styles.refreshBtn}
+              onClick={(e) => {
+                e.stopPropagation();
+                _handleNewFolder();
+              }}
+              title="Neuer Ordner"
+              type="button"
+              tabIndex={-1}
+            >
+              <FaFolderPlus />
+            </button>
+          )}
           <button
             className={styles.refreshBtn}
             onClick={(e) => {
@@ -832,6 +892,7 @@ export function FormGeneratorTree<T = any>({
               _handleRefresh();
             }}
             title="Aktualisieren"
+            type="button"
             tabIndex={-1}
           >
             <FaSyncAlt />
@@ -941,6 +1002,7 @@ export function FormGeneratorTree<T = any>({
           </div>
         </div>
       )}
+      <PromptDialog />
     </div>
   );
 }

src/components/FormGenerator/FormGeneratorTree/__tests__/FormGeneratorTree.test.tsx

@@ -2,11 +2,21 @@
 // All rights reserved.
 
 import { describe, expect, it, vi, beforeEach } from 'vitest';
-import { render, screen, waitFor, within } from '@testing-library/react';
+import { render, screen, waitFor, within, fireEvent } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { FormGeneratorTree } from '../FormGeneratorTree';
 import type { TreeNode, TreeNodeProvider, TreeBatchAction } from '../types';
 
+const { mockPrompt } = vi.hoisted(() => ({
+  mockPrompt: vi.fn(() => Promise.resolve('NeuOrdner')),
+}));
+
+vi.mock('../../../../hooks/usePrompt', () => ({
+  usePrompt: () => ({
+    prompt: mockPrompt,
+    PromptDialog: () => null,
+  }),
+}));
 // ---------------------------------------------------------------------------
 // Fixtures
 // ---------------------------------------------------------------------------
@@ -90,6 +100,11 @@ function _createMockProvider(nodes: TreeNode[]): TreeNodeProvider {
 
 describe('FormGeneratorTree', () => {
   describe('Rendering', () => {
+    beforeEach(() => {
+      mockPrompt.mockClear();
+      mockPrompt.mockResolvedValue('NeuOrdner');
+    });
+
     it('renders tree with title and node count', async () => {
       const provider = _createMockProvider([_ownFolder]);
       render(
@@ -174,6 +189,85 @@ describe('FormGeneratorTree', () => {
     });
   });
 
+  // ---------------------------------------------------------------------------
+  // New folder
+  // ---------------------------------------------------------------------------
+
+  describe('New folder', () => {
+    beforeEach(() => {
+      mockPrompt.mockClear();
+      mockPrompt.mockResolvedValue('NeuOrdner');
+    });
+
+    it('shows header button when titled own tree has createChild', async () => {
+      const provider = _createMockProvider([_ownFolder]);
+      render(<FormGeneratorTree provider={provider} ownership="own" title="Documents" />);
+
+      await waitFor(() => {
+        expect(screen.getByText('My Folder')).toBeInTheDocument();
+      });
+      expect(screen.getByTitle('Neuer Ordner')).toBeInTheDocument();
+    });
+
+    it('does not show new folder for shared tree', async () => {
+      const provider = _createMockProvider([_sharedFolder]);
+      render(<FormGeneratorTree provider={provider} ownership="shared" title="Shared" />);
+
+      await waitFor(() => {
+        expect(screen.getByText('Shared Folder')).toBeInTheDocument();
+      });
+      expect(screen.queryByTitle('Neuer Ordner')).not.toBeInTheDocument();
+    });
+
+    it('calls createChild at root when nothing selected', async () => {
+      const user = userEvent.setup();
+      const provider = _createMockProvider([_ownFolder]);
+      render(<FormGeneratorTree provider={provider} ownership="own" title="Docs" />);
+
+      await waitFor(() => {
+        expect(screen.getByText('My Folder')).toBeInTheDocument();
+      });
+      await user.click(screen.getByTitle('Neuer Ordner'));
+
+      await waitFor(() => {
+        expect(provider.createChild).toHaveBeenCalledWith(null, 'NeuOrdner');
+      });
+    });
+
+    it('calls createChild under selected folder', async () => {
+      const user = userEvent.setup();
+      const provider = _createMockProvider([_ownFolder]);
+      render(<FormGeneratorTree provider={provider} ownership="own" title="Docs" />);
+
+      await waitFor(() => {
+        expect(screen.getByText('My Folder')).toBeInTheDocument();
+      });
+      await user.click(screen.getByRole('treeitem', { name: /My Folder/i }));
+      await user.click(screen.getByTitle('Neuer Ordner'));
+
+      await waitFor(() => {
+        expect(provider.createChild).toHaveBeenCalledWith('f1', 'NeuOrdner');
+      });
+    });
+
+    it('hides button when allowCreateFolder is false', async () => {
+      const provider = _createMockProvider([_ownFolder]);
+      render(
+        <FormGeneratorTree
+          provider={provider}
+          ownership="own"
+          title="Docs"
+          allowCreateFolder={false}
+        />,
+      );
+
+      await waitFor(() => {
+        expect(screen.getByText('My Folder')).toBeInTheDocument();
+      });
+      expect(screen.queryByTitle('Neuer Ordner')).not.toBeInTheDocument();
+    });
+  });
+
   // ---------------------------------------------------------------------------
   // Selection
   // ---------------------------------------------------------------------------
@@ -228,8 +322,8 @@ describe('FormGeneratorTree', () => {
         expect(screen.getByText('My Folder')).toBeInTheDocument();
       });
 
-      await user.click(screen.getByRole('treeitem', { name: /My Folder/i }));
-      await user.click(screen.getByRole('treeitem', { name: /Other Folder/i }), {
+      fireEvent.click(screen.getByRole('treeitem', { name: /My Folder/i }));
+      fireEvent.click(screen.getByRole('treeitem', { name: /Other Folder/i }), {
         ctrlKey: true,
       });
 
@@ -238,7 +332,7 @@ describe('FormGeneratorTree', () => {
       expect(lastCall.has('f2')).toBe(true);
     });
 
-    it('click on selected folder cascades deselect of descendants (own)', async () => {
+    it('second click on folder with cascaded child selection keeps cascaded selection (own)', async () => {
       const user = userEvent.setup();
       const onSelectionChange = vi.fn();
       const provider = _createMockProvider([_ownFolder, _ownFile]);
@@ -270,12 +364,11 @@ describe('FormGeneratorTree', () => {
       expect(lastCall.has('f1')).toBe(true);
       expect(lastCall.has('file1')).toBe(true);
 
-      // Click again to deselect
       await user.click(screen.getByRole('treeitem', { name: /My Folder/i }));
 
       lastCall = onSelectionChange.mock.calls.at(-1)![0] as Set<string>;
-      expect(lastCall.has('f1')).toBe(false);
-      expect(lastCall.has('file1')).toBe(false);
+      expect(lastCall.has('f1')).toBe(true);
+      expect(lastCall.has('file1')).toBe(true);
     });
 
     it('selection in shared tree does NOT cascade to children', async () => {
@@ -455,6 +548,13 @@ describe('FormGeneratorTree', () => {
   // ---------------------------------------------------------------------------
 
   describe('Delete', () => {
+    beforeEach(() => {
+      vi.spyOn(window, 'confirm').mockReturnValue(true);
+    });
+    afterEach(() => {
+      vi.restoreAllMocks();
+    });
+
     it('delete button calls provider.deleteNodes', async () => {
       const user = userEvent.setup();
       const provider = _createMockProvider([_ownFolder]);
@@ -465,7 +565,7 @@ describe('FormGeneratorTree', () => {
       });
 
       const row = screen.getByRole('treeitem', { name: /My Folder/i });
-      const deleteBtn = within(row).getByTitle('Delete');
+      const deleteBtn = within(row).getByTitle('Loeschen');
       await user.click(deleteBtn);
 
       await waitFor(() => {
@@ -482,7 +582,7 @@ describe('FormGeneratorTree', () => {
       });
 
       const row = screen.getByRole('treeitem', { name: /Shared Folder/i });
-      expect(within(row).queryByTitle('Delete')).not.toBeInTheDocument();
+      expect(within(row).queryByTitle('Loeschen')).not.toBeInTheDocument();
     });
   });
 
@@ -541,7 +641,7 @@ describe('FormGeneratorTree', () => {
         expect(screen.getByText('My Folder')).toBeInTheDocument();
       });
 
-      const neutralizeBtn = screen.getByTitle('Not neutralized');
+      const neutralizeBtn = screen.getByTitle('Nicht neutralisiert');
       await user.click(neutralizeBtn);
 
       await waitFor(() => {
@@ -562,7 +662,7 @@ describe('FormGeneratorTree', () => {
         expect(screen.getByText('Shared Folder')).toBeInTheDocument();
       });
 
-      const neutralizeBtn = screen.getByTitle('Not neutralized');
+      const neutralizeBtn = screen.getByTitle('Nicht neutralisiert');
       await user.click(neutralizeBtn);
 
       expect(provider.patchNeutralize).not.toHaveBeenCalled();

src/components/FormGenerator/FormGeneratorTree/__tests__/dnd.test.tsx

@@ -6,6 +6,12 @@ import { render, screen, waitFor, fireEvent } from '@testing-library/react';
 import { FormGeneratorTree } from '../FormGeneratorTree';
 import type { TreeNode, TreeNodeProvider } from '../types';
 
+vi.mock('../../../../hooks/usePrompt', () => ({
+  usePrompt: () => ({
+    prompt: vi.fn(() => Promise.resolve('x')),
+    PromptDialog: () => null,
+  }),
+}));
 // ---------------------------------------------------------------------------
 // Fixtures
 // ---------------------------------------------------------------------------

src/components/FormGenerator/FormGeneratorTree/providers/FolderFileProvider.tsx

@@ -108,7 +108,7 @@ export function createFolderFileProvider(): TreeNodeProvider {
       return nodes;
     },
 
-    canCreate() {
+    canCreate(_parentId: string | null) {
       return true;
     },
 
@@ -137,7 +137,9 @@ export function createFolderFileProvider(): TreeNodeProvider {
 
     async createChild(parentId, name) {
       const res = await api.post('/api/files/folders', { name, parentId });
-      return _mapFolderToNode(res.data, 'own');
+      const node = _mapFolderToNode(res.data, 'own');
+      typeMap.set(node.id, 'folder');
+      return node;
     },
 
     async renameNode(id, newName) {

src/components/FormGenerator/FormGeneratorTree/types.ts

@@ -60,5 +60,7 @@ export interface FormGeneratorTreeProps<T = any> {
   onSelectionChange?: (selectedIds: Set<string>) => void;
   onRefresh?: () => void;
   onSendToChat?: (node: TreeNode<T>) => void;
+  /** When false, hides "Neuer Ordner" (e.g. map from table file permissions). Default true. */
+  allowCreateFolder?: boolean;
   className?: string;
 }

src/pages/basedata/FilesPage.tsx

@@ -370,6 +370,7 @@ export const FilesPage: React.FC = () => {
               ownership="own"
               title={t('Eigene')}
               showFilter={true}
+              allowCreateFolder={canCreate}
               onNodeClick={_handleTreeNodeClick}
               onRefresh={() => _tableRefetch()}
             />