diff --git a/docs/21-menus-and-toggles.md b/docs/21-menus-and-toggles.md
index 38dceac..3ac615b 100644
--- a/docs/21-menus-and-toggles.md
+++ b/docs/21-menus-and-toggles.md
@@ -1,5 +1,7 @@
 # 菜单与切换五项（2026-11-14）
 
+> **勘误（2026-11-14 晚，见 docs/26）**：本文 §1 所称「全局监听 contextmenu 屏蔽 WebView 菜单」当时并未真正落进代码（提交里只有文档与说明文字），编辑区右键一直是浏览器自带菜单。屏蔽与编辑区自绘右键菜单已在 docs/26 补齐。
+
 ## 1. 屏蔽浏览器右键菜单
 
 App 全局监听 contextmenu 并 preventDefault：编辑区、标题栏等处不再冒出
diff --git a/docs/26-编辑区右键菜单.md b/docs/26-编辑区右键菜单.md
new file mode 100644
index 0000000..f5fcd75
--- /dev/null
+++ b/docs/26-编辑区右键菜单.md
@@ -0,0 +1,41 @@
+# docs/26 编辑区自绘右键菜单 + WebView 自带菜单屏蔽（补账）
+
+## 先说清一笔旧账
+
+docs/21 §1 写了「App 全局监听 contextmenu 并 preventDefault、编辑区
+右键已被屏蔽」，但核查提交 2d1cd30 的实际代码后确认：**那段监听从未
+落进代码**，只有文档与提交说明写了。结果就是编辑区右键一直是 WebView
+自带菜单——用户再次报回。docs/21 已加勘误。本次把屏蔽与自绘菜单一并
+真正实现，并用无头浏览器的真实右键逐项验证（见下）。
+
+## 实现
+
+1. **全局屏蔽**（App 挂载 effect）：document 监听 contextmenu 并
+   preventDefault；`input / textarea` 豁免（输入框保留系统菜单的拼写
+   检查与粘贴）。React 的各自定义菜单（标签/文件树/编辑区）在冒泡链
+   上先于 document 监听打开，不受影响。
+2. **编辑区自绘菜单**（新组件 EditorContextMenu）：在 .editor-area 上
+   按事件落点分发——富文本落在 .ProseMirror、源码落在 .source-cm 才
+   弹出。条目与顶部「编辑/格式」菜单同一套实现：
+   - 剪切 / 复制（无选区禁用，选区状态在打开瞬间从编辑器状态读取，
+     源码模式经 SourceEditorApi 新增的 hasSelection）；
+   - 粘贴（走既有 pasteFromClipboard：富文本经剪贴板读文本插入，
+     源码聚焦后原生粘贴）；全选；
+   - 富文本独有：加粗 / 斜体 / 删除线 / 行内代码 / 超链接…；
+   - 末项模式切换（源码模式 ↔ 即时渲染）。
+   菜单容器 mousedown 阻止默认行为，焦点与选区留在编辑器里，
+   execCommand 类命令作用准确；位置按窗口尺寸夹取不溢出。
+
+## 验证
+
+- 无头浏览器真实右键：菜单弹出且条目齐全；无选区时剪切/复制禁用、
+  全选后可用；点「加粗」选中文本真的变粗；标题栏右键无自绘菜单
+  （自带菜单已被屏蔽）；合成事件核查：编辑区 contextmenu 被
+  preventDefault、输入框放行。
+- 组件测试 2 例（tests/editor-context-menu.test.tsx）；vitest 108+2；
+  tsc 0 错误；构建通过。
+
+## 待真机复验
+
+- WebView2 里右键不再出现自带菜单（拼写检查/检查元素等）；
+- 粘贴在桌面端的剪贴板权限表现（与顶部「编辑 → 粘贴」同一路径）。
diff --git a/src/App.tsx b/src/App.tsx
index 8165c00..1688d32 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -9,6 +9,7 @@ import StatusBar from './components/StatusBar'
 import EditorPane from './components/EditorPane'
 import type { SourceEditorApi } from './components/SourceEditor'
 import FindBar from './components/FindBar'
+import EditorContextMenu, { type EditorMenuAction } from './components/EditorContextMenu'
 import type { EditorPaneApi } from './components/EditorPane'
 import type { FindOptions } from './editor/search'
 import { comboFromEvent, resolveShortcuts } from './utils/shortcuts'
@@ -912,6 +913,54 @@ export default function App() {
     return () => document.removeEventListener('keydown', onKey)
   }, [tab, newDoc, openFile, saveTab, closeTab, withEditor, ui.shortcuts, openFind, closeFind])
 
+  // 屏蔽 WebView 自带右键菜单：编辑区/标题栏等处右键不再冒出浏览器菜单；
+  // 输入框保留系统菜单（拼写检查、粘贴等在输入框里是刚需）。
+  // 应用自绘菜单（标签/文件树/编辑区）走各自的 contextmenu 处理，不受影响
+  // （React 处理在冒泡链上先于 document 监听执行）。
+  useEffect(() => {
+    const onContextMenu = (e: MouseEvent) => {
+      if ((e.target as HTMLElement | null)?.closest('input, textarea')) return
+      e.preventDefault()
+    }
+    document.addEventListener('contextmenu', onContextMenu)
+    return () => document.removeEventListener('contextmenu', onContextMenu)
+  }, [])
+
+  // ——— 编辑区自绘右键菜单 ———
+  const [editorMenu, setEditorMenu] = useState<{ x: number; y: number; hasSelection: boolean } | null>(null)
+  const openEditorMenu = (e: React.MouseEvent) => {
+    const target = e.target as HTMLElement
+    const inEditor = sourceMode
+      ? Boolean(target.closest('.source-cm'))
+      : Boolean(target.closest('.ProseMirror'))
+    if (!inEditor) return
+    e.preventDefault()
+    let hasSelection = false
+    if (sourceMode) {
+      hasSelection = sourceApiRef.current?.hasSelection() ?? false
+    } else if (tab) {
+      const editor = paneApisRef.current.get(tab.id)?.editor
+      if (editor) {
+        try { hasSelection = editor.action((ctx) => !ctx.get(editorViewCtx).state.selection.empty) } catch { hasSelection = false }
+      }
+    }
+    setEditorMenu({ x: e.clientX, y: e.clientY, hasSelection })
+  }
+  const runEditorMenuAction = (action: EditorMenuAction) => {
+    switch (action) {
+      case 'cut': document.execCommand('cut'); break
+      case 'copy': document.execCommand('copy'); break
+      case 'paste': void pasteFromClipboard(); break
+      case 'selectAll': document.execCommand('selectAll'); break
+      case 'bold': withEditor(editorCommands.bold); break
+      case 'italic': withEditor(editorCommands.italic); break
+      case 'strikethrough': withEditor(editorCommands.strikethrough); break
+      case 'inlineCode': withEditor(editorCommands.inlineCode); break
+      case 'link': setModal('link'); break
+      case 'toggleSource': toggleSourceMode(); break
+    }
+  }
+
   const pasteFromClipboard = useCallback(async () => {
     if (sourceMode) {
       // 源码模式下 CodeMirror 自带粘贴处理，聚焦后由浏览器原生粘贴完成
@@ -1360,7 +1409,7 @@ export default function App() {
           onExportTab={exportTabById}
           onPrintTab={printTabById}
         />
-        <div className="editor-area" style={{ ['--doc-zoom' as string]: zoom }}>
+        <div className="editor-area" style={{ ['--doc-zoom' as string]: zoom }} onContextMenu={openEditorMenu}>
           {!tab && (
             <div className="empty-state">
               <h2>没有打开的文档</h2>
@@ -1533,6 +1582,16 @@ export default function App() {
         />
       )}
       {notice && <div className="app-notice">{notice}</div>}
+      {editorMenu && tab && (
+        <EditorContextMenu
+          x={editorMenu.x}
+          y={editorMenu.y}
+          hasSelection={editorMenu.hasSelection}
+          sourceMode={sourceMode}
+          onAction={runEditorMenuAction}
+          onClose={() => setEditorMenu(null)}
+        />
+      )}
       {recoveryOffer.length > 0 && !recoveryDismissed && (
         <RecoveryModal
           items={recoveryOffer}
diff --git a/src/components/EditorContextMenu.tsx b/src/components/EditorContextMenu.tsx
new file mode 100644
index 0000000..1035bd0
--- /dev/null
+++ b/src/components/EditorContextMenu.tsx
@@ -0,0 +1,59 @@
+import { useRef } from 'react'
+import { useDismiss } from '../hooks/useDismiss'
+
+export type EditorMenuAction =
+  | 'cut' | 'copy' | 'paste' | 'selectAll'
+  | 'bold' | 'italic' | 'strikethrough' | 'inlineCode' | 'link'
+  | 'toggleSource'
+
+interface Props {
+  x: number
+  y: number
+  /** 当前是否有选区（决定剪切/复制是否可用） */
+  hasSelection: boolean
+  sourceMode: boolean
+  onAction: (action: EditorMenuAction) => void
+  onClose: () => void
+}
+
+/**
+ * 编辑区自绘右键菜单（替代 WebView 自带菜单）：编辑命令与顶部「编辑/格式」
+ * 菜单同一套实现。容器 mousedown 阻止默认行为，让焦点与选区留在编辑器里，
+ * execCommand 类命令才作用得准。
+ */
+export default function EditorContextMenu({ x, y, hasSelection, sourceMode, onAction, onClose }: Props) {
+  const ref = useRef<HTMLDivElement>(null)
+  useDismiss(ref, true, onClose)
+  const act = (a: EditorMenuAction) => { onClose(); onAction(a) }
+  // 位置夹取，避免菜单溢出窗口右/下边（尺寸为估算值：宽约 190，高随模式）
+  const left = Math.max(4, Math.min(x, window.innerWidth - 196))
+  const estHeight = sourceMode ? 236 : 388
+  const top = Math.max(4, Math.min(y, window.innerHeight - estHeight - 8))
+  return (
+    <div
+      className="tree-context-menu editor-context-menu"
+      ref={ref}
+      style={{ left, top }}
+      onClick={(e) => e.stopPropagation()}
+      onMouseDown={(e) => e.preventDefault()}
+      onContextMenu={(e) => e.preventDefault()}
+    >
+      <button disabled={!hasSelection} onClick={() => act('cut')}>剪切</button>
+      <button disabled={!hasSelection} onClick={() => act('copy')}>复制</button>
+      <button onClick={() => act('paste')}>粘贴</button>
+      <button onClick={() => act('selectAll')}>全选</button>
+      {!sourceMode && (
+        <>
+          <div className="tree-menu-divider" />
+          <button onClick={() => act('bold')}>加粗</button>
+          <button onClick={() => act('italic')}>斜体</button>
+          <button onClick={() => act('strikethrough')}>删除线</button>
+          <button onClick={() => act('inlineCode')}>行内代码</button>
+          <button onClick={() => act('link')}>超链接…</button>
+        </>
+      )}
+      <div className="tree-menu-divider" />
+      <button onClick={() => act('toggleSource')}>{sourceMode ? '即时渲染' : '源码模式'}</button>
+    </div>
+  )
+}
diff --git a/src/components/SourceEditor.tsx b/src/components/SourceEditor.tsx
index 3eab843..5994ff1 100644
--- a/src/components/SourceEditor.tsx
+++ b/src/components/SourceEditor.tsx
@@ -13,6 +13,7 @@ export interface SourceEditorApi {
   jumpToLine: (line: number) => void
   getAnchor: () => CursorAnchor | null
   focus: () => void
+  hasSelection: () => boolean
   findAll: (query: string, opts: FindOptions) => number
   gotoMatch: (index: number) => number
   replaceCurrent: (replacement: string) => boolean
@@ -154,6 +155,7 @@ export default function SourceEditor({ tabId, initialText, initialCursorOffset,
       },
       getAnchor: () => anchorFromMarkdown(view.state.doc.toString(), view.state.selection.main.head),
       focus: () => view.focus(),
+      hasSelection: () => !view.state.selection.main.empty,
       findAll,
       gotoMatch,
       replaceCurrent: (replacement) => {
diff --git a/src/styles.css b/src/styles.css
index 656f2a5..f170400 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -216,6 +216,8 @@ kbd { background: var(--code-bg); border: 1px solid var(--border); border-radius
 .tree-context-menu button { display: block; width: 100%; text-align: left; border: 0; background: transparent; padding: 6px 10px; border-radius: 6px; cursor: pointer; font-size: 13px; }
 .tree-context-menu button:hover { background: var(--accent-weak); }
 .tree-context-menu button.danger { color: #b3261e; }
+.editor-context-menu button:disabled { opacity: 0.45; cursor: default; }
+.editor-context-menu button:disabled:hover { background: transparent; }
 
 /* ——— 阶段 5：文档主题（变量层，[data-doc-theme] 挂在 html 上） ——— */
 :root {
diff --git a/tests/editor-context-menu.test.tsx b/tests/editor-context-menu.test.tsx
new file mode 100644
index 0000000..7441b8d
--- /dev/null
+++ b/tests/editor-context-menu.test.tsx
@@ -0,0 +1,49 @@
+// 编辑区右键菜单：条目随模式/选区变化，点击回传动作并关闭。
+import { describe, it, expect, vi } from 'vitest'
+import { createRoot } from 'react-dom/client'
+import { act } from 'react-dom/test-utils'
+import EditorContextMenu from '../src/components/EditorContextMenu'
+
+async function renderMenu(props: Record<string, unknown> = {}) {
+  const container = document.createElement('div')
+  document.body.appendChild(container)
+  const root = createRoot(container)
+  const actions: string[] = []
+  let closed = 0
+  await act(async () => {
+    root.render(
+      <EditorContextMenu
+        x={10} y={10} hasSelection={false} sourceMode={false}
+        onAction={(a) => actions.push(a)}
+        onClose={() => { closed += 1 }}
+        {...props}
+      />,
+    )
+  })
+  return { container, root, actions, closedCount: () => closed }
+}
+
+const btn = (c: HTMLElement, text: string) => [...c.querySelectorAll('button')].find((b) => b.textContent === text)
+
+describe('编辑区右键菜单', () => {
+  it('无选区时剪切/复制禁用，点加粗回传 bold 并关闭', async () => {
+    const { container, root, actions, closedCount } = await renderMenu()
+    expect(btn(container, '剪切')?.disabled).toBe(true)
+    expect(btn(container, '复制')?.disabled).toBe(true)
+    expect(btn(container, '粘贴')?.disabled).toBe(false)
+    await act(async () => { btn(container, '加粗')?.dispatchEvent(new MouseEvent('click', { bubbles: true })) })
+    expect(actions).toEqual(['bold'])
+    expect(closedCount()).toBe(1)
+    await act(async () => { root.unmount() })
+    container.remove()
+  })
+
+  it('源码模式只出编辑命令与「即时渲染」', async () => {
+    const { container, root } = await renderMenu({ sourceMode: true, hasSelection: true })
+    expect(btn(container, '加粗')).toBeUndefined()
+    expect(btn(container, '即时渲染')).toBeTruthy()
+    expect(btn(container, '剪切')?.disabled).toBe(false)
+    await act(async () => { root.unmount() })
+    container.remove()
+  })
+})