feat(workspace): move status pills to tab bar and add undo/redo and actions menu to note header

frontend/src/features/workspace/__tests__/DocumentEditor.header.test.tsx

@@ -0,0 +1,163 @@
+import React from 'react';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import { DocumentEditor } from '../DocumentEditor';
+import { api } from '../../../lib/api';
+import { Document } from '../../../lib/types';
+import { EngineState } from '../../../lib/docSync/engine';
+
+let currentListener: ((state: EngineState) => void) | null = null;
+const mockUndo = vi.fn(() => ({ ok: true }));
+const mockRedo = vi.fn(() => ({ ok: true }));
+
+const baseEngineState: EngineState = {
+  ready: true,
+  status: 'saved',
+  role: 'owner',
+  title: 'Test Notiz',
+  blocks: [{ id: 'b1', documentId: 'doc_1', type: 'text', content: 'Hallo', level: 0, position: 1000 }],
+  pendingCount: 0,
+  shared: true,
+  sessions: 2,
+  presence: [{ userId: 'u2', name: 'Bob' }],
+  lockedByOthers: [],
+  conflicts: [],
+  canUndo: false,
+  canRedo: false,
+  channel: 'ws',
+};
+
+vi.mock('../../../lib/docSync/engine', () => {
+  return {
+    DocSyncEngine: class {
+      subscribe(fn: (state: EngineState) => void) {
+        currentListener = fn;
+        fn(baseEngineState);
+        return () => {
+          currentListener = null;
+        };
+      }
+      start() {
+        return Promise.resolve();
+      }
+      stop() {}
+      getState() {
+        return baseEngineState;
+      }
+      setTaskLinks() {}
+      focusBlock() {}
+      applyFlat() {}
+      setTitle() {}
+      undo() {
+        return mockUndo();
+      }
+      redo() {
+        return mockRedo();
+      }
+    },
+  };
+});
+
+vi.mock('../../../lib/api', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('../../../lib/api')>();
+  return {
+    ...actual,
+    api: {
+      ...actual.api,
+      getDocument: vi.fn(),
+      getUsersDirectory: vi.fn(() => Promise.resolve([])),
+      getDocumentBacklinks: vi.fn(() => Promise.resolve({ backlinks: [] })),
+    },
+  };
+});
+
+const makeDoc = (overrides: Partial<Document> = {}): Document => ({
+  id: 'doc_1',
+  userId: 'u1',
+  title: 'Test Notiz',
+  icon: '📝',
+  folderPath: '',
+  content: '',
+  blocks: [{ id: 'b1', documentId: 'doc_1', type: 'text', content: 'Hallo', level: 0, position: 1000 }],
+  tags: [],
+  isPinned: false,
+  isArchived: false,
+  isOwner: true,
+  createdAt: '2026-10-30T08:00:00Z',
+  updatedAt: '2026-10-30T08:00:00Z',
+  ...overrides,
+});
+
+describe('DocumentEditor header actions & status callback (Teil D)', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    const doc = makeDoc();
+    vi.mocked(api.getDocument).mockResolvedValue(doc);
+  });
+
+  it('reports live/presence status upward via onHeaderStatusChange and renders Undo/Redo + Three-Dots menu', async () => {
+    const doc = makeDoc({ isOwner: true });
+    const onHeaderStatusChange = vi.fn();
+    const onRequestMerge = vi.fn();
+    const onDeleteDoc = vi.fn();
+    const onOpenShareModal = vi.fn();
+
+    render(
+      <DocumentEditor
+        docId="doc_1"
+        initialDoc={doc}
+        availableFolders={[]}
+        onDocMetadataChange={vi.fn()}
+        onDeleteDoc={onDeleteDoc}
+        onOpenShareModal={onOpenShareModal}
+        onSelectTag={vi.fn()}
+        onRequestMerge={onRequestMerge}
+        onHeaderStatusChange={onHeaderStatusChange}
+      />
+    );
+
+    await waitFor(() => {
+      expect(onHeaderStatusChange).toHaveBeenCalledWith(
+        expect.objectContaining({
+          showLive: true,
+          channel: 'ws',
+        })
+      );
+    });
+
+    // Undo / Redo buttons disabled initially
+    const undoBtn = screen.getByTitle('Rückgängig (Strg+Z)') as HTMLButtonElement;
+    const redoBtn = screen.getByTitle('Wiederholen (Strg+Y)') as HTMLButtonElement;
+    expect(undoBtn.disabled).toBe(true);
+    expect(redoBtn.disabled).toBe(true);
+
+    // Enable Undo & Redo via engine state update
+    currentListener?.({ ...baseEngineState, canUndo: true, canRedo: true });
+    await waitFor(() => {
+      expect(undoBtn.disabled).toBe(false);
+      expect(redoBtn.disabled).toBe(false);
+    });
+
+    fireEvent.click(undoBtn);
+    expect(mockUndo).toHaveBeenCalledTimes(1);
+    fireEvent.click(redoBtn);
+    expect(mockRedo).toHaveBeenCalledTimes(1);
+
+    // Share button is directly visible
+    const shareBtn = screen.getByTitle('Notiz teilen und Berechtigungen');
+    fireEvent.click(shareBtn);
+    expect(onOpenShareModal).toHaveBeenCalledWith(doc);
+
+    // Three-dots menu opens on click, shows secondary actions, and closes on Escape
+    const moreBtn = screen.getByTitle('Weitere Aktionen');
+    fireEvent.click(moreBtn);
+
+    expect(screen.getByText('Notiz anheften')).toBeTruthy();
+    expect(screen.getByText('Mit anderer Notiz zusammenführen…')).toBeTruthy();
+    expect(screen.getByText('Als Markdown (.md) exportieren')).toBeTruthy();
+    expect(screen.getByText('Notiz löschen')).toBeTruthy();
+
+    fireEvent.keyDown(document, { key: 'Escape' });
+    expect(screen.queryByText('Notiz anheften')).toBeNull();
+  });
+});