fix: milkdown first-change issue

tests/renderer/components/EditorVisualModePersistence.test.tsx

@@ -0,0 +1,203 @@
+import React from 'react';
+import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
+import { render, act } from '@testing-library/react';
+
+let markdownUpdatedHandler: ((ctx: unknown, markdown: string, prevMarkdown: string) => void) | null = null;
+
+vi.mock('@monaco-editor/react', () => ({
+  default: () => <div data-testid="monaco-editor" />,
+}));
+
+vi.mock('@milkdown/kit/core', () => {
+  const makeChain = () => {
+    const chain = {
+      config: (callback: (ctx: { set: () => void; get: () => { markdownUpdated: (cb: typeof markdownUpdatedHandler) => void } }) => void) => {
+        callback({
+          set: () => {},
+          get: () => ({
+            markdownUpdated: (cb) => {
+              markdownUpdatedHandler = cb;
+            },
+          }),
+        });
+        return chain;
+      },
+      use: () => chain,
+    };
+    return chain;
+  };
+
+  return {
+    Editor: {
+      make: makeChain,
+    },
+    defaultValueCtx: Symbol('defaultValueCtx'),
+    editorViewCtx: Symbol('editorViewCtx'),
+    rootCtx: Symbol('rootCtx'),
+    remarkStringifyOptionsCtx: Symbol('remarkStringifyOptionsCtx'),
+    remarkPluginsCtx: Symbol('remarkPluginsCtx'),
+  };
+});
+
+vi.mock('@milkdown/kit/preset/commonmark', () => ({
+  commonmark: {},
+  toggleStrongCommand: { key: 'toggleStrong' },
+  toggleEmphasisCommand: { key: 'toggleEmphasis' },
+  wrapInBlockquoteCommand: { key: 'wrapInBlockquote' },
+  wrapInBulletListCommand: { key: 'wrapInBulletList' },
+  wrapInOrderedListCommand: { key: 'wrapInOrderedList' },
+  insertHrCommand: { key: 'insertHr' },
+  toggleInlineCodeCommand: { key: 'toggleInlineCode' },
+  insertImageCommand: { key: 'insertImage' },
+  toggleLinkCommand: { key: 'toggleLink' },
+}));
+
+vi.mock('@milkdown/kit/preset/gfm', () => ({
+  gfm: {},
+  toggleStrikethroughCommand: { key: 'toggleStrike' },
+}));
+
+vi.mock('@milkdown/kit/plugin/history', () => ({
+  history: {},
+  undoCommand: { key: 'undo' },
+  redoCommand: { key: 'redo' },
+}));
+
+vi.mock('@milkdown/kit/plugin/listener', () => ({
+  listener: {},
+  listenerCtx: Symbol('listenerCtx'),
+}));
+
+vi.mock('@milkdown/kit/plugin/clipboard', () => ({ clipboard: {} }));
+vi.mock('@milkdown/kit/plugin/trailing', () => ({ trailing: {} }));
+vi.mock('@milkdown/kit/plugin/indent', () => ({ indent: {} }));
+vi.mock('@milkdown/kit/plugin/cursor', () => ({ cursor: {} }));
+
+vi.mock('@milkdown/kit/utils', () => ({
+  $node: () => ({}),
+  $inputRule: () => ({}),
+  $remark: () => ({}),
+  $prose: () => ({}),
+  replaceAll: (content: string) => () => {
+    const normalized = content.replace('\n', '\n\n');
+    markdownUpdatedHandler?.({}, normalized, '');
+  },
+  callCommand: () => () => {},
+}));
+
+vi.mock('@milkdown/react', () => ({
+  Milkdown: () => <div data-testid="milkdown" />,
+  MilkdownProvider: ({ children }: { children: React.ReactNode }) => <>{children}</>,
+  useInstance: () => [false, () => ({ action: (action: unknown) => {
+    if (typeof action === 'function') {
+      action({ get: () => ({}) });
+    }
+  } })] as const,
+  useEditor: (factory: (root: Node) => unknown) => {
+    factory(document.createElement('div'));
+  },
+}));
+
+vi.mock('../../../src/renderer/components/Lightbox', () => ({
+  Lightbox: () => null,
+  useMarkdownImages: () => [],
+}));
+vi.mock('../../../src/renderer/components/PostLinks', () => ({ PostLinks: () => null }));
+vi.mock('../../../src/renderer/components/LinkedMediaPanel', () => ({ LinkedMediaPanel: () => null }));
+vi.mock('../../../src/renderer/components/ErrorModal', () => ({ ErrorModal: () => null }));
+vi.mock('../../../src/renderer/components/ConfirmDeleteModal', () => ({ ConfirmDeleteModal: () => null }));
+vi.mock('../../../src/renderer/components/SettingsView', () => ({ SettingsView: () => null }));
+vi.mock('../../../src/renderer/components/TagsView', () => ({ TagsView: () => null }));
+vi.mock('../../../src/renderer/components/TagInput', () => ({ TagInput: () => null }));
+vi.mock('../../../src/renderer/components/ChatPanel', () => ({ ChatPanel: () => null }));
+vi.mock('../../../src/renderer/components/ImportAnalysisView', () => ({ ImportAnalysisView: () => null }));
+vi.mock('../../../src/renderer/components/MetadataDiffPanel', () => ({ MetadataDiffPanel: () => null }));
+vi.mock('../../../src/renderer/components/GitDiffView/GitDiffView', () => ({ GitDiffView: () => null }));
+vi.mock('../../../src/renderer/components/InsertModal', () => ({ InsertModal: () => null }));
+vi.mock('../../../src/renderer/components/AISuggestionsModal/AISuggestionsModal', () => ({
+  AISuggestionsModal: () => null,
+}));
+vi.mock('../../../src/renderer/components/Toast', () => ({
+  showToast: {
+    success: vi.fn(),
+    error: vi.fn(),
+  },
+}));
+
+import { PostEditor } from '../../../src/renderer/components/Editor/Editor';
+import { useAppStore } from '../../../src/renderer/store';
+
+const createPost = () => ({
+  id: 'post-1',
+  title: 'Test Post',
+  content: 'Line one\nLine two',
+  excerpt: '',
+  slug: 'test-post',
+  status: 'draft' as const,
+  tags: [],
+  categories: ['article'],
+  featuredImage: null,
+  publishedAt: null,
+  createdAt: new Date('2026-02-16T12:00:00.000Z'),
+  updatedAt: new Date('2026-02-16T12:00:00.000Z'),
+  author: undefined,
+  metadata: {},
+  seoTitle: undefined,
+  seoDescription: undefined,
+  canonicalUrl: undefined,
+  projectId: 'project-1',
+  filePath: 'posts/test-post.md',
+});
+
+describe('Editor visual mode persistence', () => {
+  beforeEach(() => {
+    markdownUpdatedHandler = null;
+    vi.clearAllMocks();
+    const neverSettles = new Promise<never>(() => {});
+
+    (window as any).addEventListener = vi.fn();
+    (window as any).removeEventListener = vi.fn();
+
+    (window as any).electronAPI.posts.get = vi.fn().mockResolvedValue(createPost());
+    (window as any).electronAPI.posts.hasPublishedVersion = vi.fn().mockReturnValue(neverSettles);
+    (window as any).electronAPI.posts.update = vi.fn().mockResolvedValue(null);
+    (window as any).electronAPI.meta.getCategories = vi.fn().mockReturnValue(neverSettles);
+
+    useAppStore.setState({
+      preferredEditorMode: 'wysiwyg',
+      posts: [],
+      media: [],
+      dirtyPosts: new Set<string>(),
+      isLoading: false,
+    });
+  });
+
+  afterEach(() => {
+    useAppStore.setState({
+      dirtyPosts: new Set<string>(),
+    });
+  });
+
+  it('does not mark post dirty when Milkdown emits formatting-only update on load', async () => {
+    let unmount: (() => void) | undefined;
+
+    await act(async () => {
+      ({ unmount } = render(<PostEditor postId="post-1" />));
+      await Promise.resolve();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    await act(async () => {
+      await new Promise((resolve) => setTimeout(resolve, 0));
+    });
+
+    expect((window as any).electronAPI.posts.get).toHaveBeenCalledWith('post-1');
+
+    expect(useAppStore.getState().isDirty('post-1')).toBe(false);
+
+    await act(async () => {
+      unmount?.();
+    });
+  });
+});