feat: 阶段1-3 桌面编辑器（Tauri 骨架/编辑核心深化/复杂内容）

tests/editor-regression.test.ts

@@ -0,0 +1,60 @@
+// 阶段门禁（架构 §7）：阶段 0 的往返稳定性套件在正式工程上必须继续全绿。
+import { describe, it, expect, afterEach } from 'vitest'
+import type { Editor } from '@milkdown/kit/core'
+import { createMarkdownEditor, getMarkdown, callUndo } from '../src/editor/editor'
+
+const SAMPLE = `# 标题
+
+包含**粗体**与任务：
+
+- [ ] 待办
+- [x] 完成
+
+| 列一 | 列二 |
+| :--- | ---: |
+| 甲 | 1 |
+
+\`\`\`ts
+const n = 1;
+\`\`\`
+`
+
+let editors: Editor[] = []
+afterEach(async () => {
+  for (const e of editors) { try { await e.destroy() } catch { /* ignore */ } }
+  editors = []
+  document.body.innerHTML = ''
+})
+
+async function load(md: string): Promise<Editor> {
+  const root = document.createElement('div')
+  document.body.appendChild(root)
+  const editor = createMarkdownEditor(root, md)
+  editors.push(editor)
+  await editor.create()
+  return editor
+}
+
+describe('编辑器回归（阶段 0 套件）', () => {
+  it('往返保真且第二轮逐字稳定', async () => {
+    const once = getMarkdown(await load(SAMPLE))
+    expect(once).toContain('**粗体**')
+    expect(once).toMatch(/-\s\[ \]\s待办/)
+    expect(once).toMatch(/-\s\[[xX]\]\s完成/)
+    expect(once).toContain('甲')
+    const twice = getMarkdown(await load(once))
+    expect(twice).toBe(once)
+  })
+
+  it('撤销命令仍可用', async () => {
+    const editor = await load('原文\n')
+    const { editorViewCtx } = await import('@milkdown/kit/core')
+    editor.action((ctx) => {
+      const view = ctx.get(editorViewCtx)
+      view.dispatch(view.state.tr.insertText('X', view.state.doc.content.size))
+    })
+    expect(getMarkdown(editor)).toContain('X')
+    callUndo(editor)
+    expect(getMarkdown(editor)).not.toContain('X')
+  })
+})