release: v0.3.13 — MeToast 集成与全面质量修复

- 集成 MetonaToast v2.0.0 替换自研 Toast 组件（右上角、进度条、自动关闭、主题联动）
- 修复 sidebar resize 未持久化到 IndexedDB
- 修复 Ctrl+Tab MRU 切换逻辑与文档不一致
- 完善 WYSIWYG 模式标签切换选区恢复
- 清理死代码（useActiveHeading observerRef、旧 Toast 样式、重复滚动条样式、SearchReplace 重复检查）
- 同步 DESIGN.md / docs 文档（CodeMirror→Milkdown、stores 计数、editorStore 字段）
- 新增 .npmrc.example 模板
- 更新关于对话框与文档远程地址为 Gitea
- 版本号 0.3.12 → 0.3.13

.npmrc.example

@@ -0,0 +1,15 @@
+# MarkLite npm 配置模板
+# 复制本文件为 .npmrc 后生效（.npmrc 已被 .gitignore 忽略，不会提交个人配置）
+#
+# 国内开发者推荐使用 npmmirror 镜像源以加速依赖下载：
+# registry=https://registry.npmmirror.com
+# ELECTRON_MIRROR=https://npmmirror.com/mirrors/electron/
+# ELECTRON_BUILDER_BINARIES_MIRROR=https://npmmirror.com/mirrors/electron-builder-binaries/
+#
+# 配置说明：
+#   registry                       — npm 包下载源
+#   ELECTRON_MIRROR                — Electron 二进制文件下载源
+#   ELECTRON_BUILDER_BINARIES_MIRROR — electron-builder 打包工具链下载源
+#
+# 注意：修改 .npmrc 后务必新开一个命令行窗口，否则环境变量不生效。
+# 详见 DEVSETUP.md

CONTRIBUTING.md

@@ -11,7 +11,7 @@
 
 2. **克隆并安装**
    ```bash
-   git clone https://gitee.com/thzxx/MarkLite.git
+   git clone https://git.metona.cn/MetonaTeam/MarkLite.git
    cd MarkLite
    npm install
    ```

DESIGN.md

@@ -1,4 +1,4 @@
-# MarkLite v0.3.12 — 架构设计文档
+# MarkLite v0.3.13 — 架构设计文档
 
 ## 1. 项目概述
 
@@ -44,7 +44,7 @@ MarkLite 是一款轻量级的 Windows 本地 Markdown 编辑器桌面应用程
 ┌───────────────────────▼──────────────────────────────────────┐
 │            Preload Script (src/preload/)  1 文件              │
 │  index.ts           contextBridge 类型安全暴露                │
-│  electronAPI        18 个方法/事件的类型安全接口               │
+│  electronAPI        22 个方法/事件的类型安全接口               │
 └───────────────────────┬──────────────────────────────────────┘
                         │
 ┌───────────────────────▼──────────────────────────────────────┐
@@ -57,7 +57,8 @@ MarkLite 是一款轻量级的 Windows 本地 Markdown 编辑器桌面应用程
 │                    SearchReplace · DropOverlay · ErrorBoundary│
 │                    AboutDialog · LoadingSpinner · Icons       │
 │                                                               │
-│  stores/ (3)        tabStore · editorStore · sidebarStore     │
+│  stores/ (5)        tabStore · editorStore · sidebarStore    │
+│                     statusBarStore · autoSaveStore            │
 │  hooks/ (19)        useTheme · useSettings · useSettingsInit │
 │                     useKeyboard · useDragDrop · useFileWatch  │
 │                     useAutoSave · useIpcListeners ...          │
@@ -83,7 +84,7 @@ MarkLite 是一款轻量级的 Windows 本地 Markdown 编辑器桌面应用程
 |------|------|------|
 | Electron | `contextIsolation: true` | 渲染进程与主进程隔离 |
 | Electron | `nodeIntegration: false` | 渲染进程无法访问 Node.js API |
-| IPC | `contextBridge.exposeInMainWorld` | 仅暴露 22 个类型安全方法/事件 |
+| IPC | `contextBridge.exposeInMainWorld` | 仅暴露 18 个类型安全方法 + 4 个事件订阅 |
 | CSP | `default-src 'self'; script-src 'self'` | 阻断内联脚本、外部资源 |
 | HTML | `rehype-sanitize` | 渲染 Markdown 时过滤危险标签/属性 |
 | 链接 | 协议白名单 | 仅允许 `http:` / `https:` / `#` 锚点 |
@@ -101,12 +102,18 @@ MarkLite 是一款轻量级的 Windows 本地 Markdown 编辑器桌面应用程
 │         │          │          │ (CM6)    │              │
 ├─────────┴──────────┴──────────┴──────────┴──────────────┤
 │                    Zustand Stores                        │
-│  ┌──────────┐ ┌──────────┐ ┌──────────┐                │
+│  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌────────────┐  │
-│  │ tabStore │ │editorStore│ │sidebarStore│               │
+│  │ tabStore │ │editorStore│ │sidebarStore│ │statusBarStore│ │
-│  │ - tabs   │ │- viewMode│ │- tree     │                │
+│  │ - tabs   │ │- viewMode│ │- tree     │ │- items     │  │
-│  │- activeId│ │- darkMode│ │- expanded │                │
+│  │- activeId│ │- darkMode│ │- expanded │ │            │  │
-│  │ - mru    │ │          │ │- rootPath │                │
+│  │ - mru    │ │- extMod  │ │- rootPath │ │            │  │
-│  └────┬─────┘ └────┬─────┘ └────┬─────┘                │
+│  └────┬─────┘ └────┬─────┘ └────┬─────┘ └─────┬──────┘  │
+│       │            │            │              │         │
+│  ┌────▼────────────▼────────────▼──────────────▼──────┐  │
+│  │  ┌──────────────┐                                  │  │
+│  │  │autoSaveStore │                                  │  │
+│  │  │- isAutoSaving│                                  │  │
+│  │  └──────────────┘                                  │  │
 │       │            │            │                        │
 │  ┌────▼────────────▼────────────▼────────────────────┐  │
 │  │              IndexedDB (Dexie.js)                  │  │
@@ -139,8 +146,10 @@ interface TabState {
 
 ```typescript
 interface EditorState {
-  viewMode: 'editor' | 'preview'  // 视图模式
+  viewMode: 'editor' | 'preview' | 'source'  // 视图模式
   darkMode: boolean                // 暗色主题
+  externallyModified: { filePath: string } | null  // 外部修改检测状态
+  loadingStates: Record<string, boolean>           // 全局加载状态
 }
 ```
 
@@ -151,7 +160,7 @@ interface SidebarState {
   isVisible: boolean       // 是否显示
   rootPath: string | null  // 当前打开的文件夹路径
   tree: FileNode[]         // 目录树数据
-  expandedDirs: Set<string> // 已展开的目录集合
+  expandedDirs: string[]   // 已展开的目录集合
   sidebarWidth: number     // 侧边栏宽度 (180~500)
 }
 ```
@@ -221,6 +230,11 @@ db.version(1).stores({
 
 两种模式共享同一 tabStore 数据源，可随时切换。
 
+### 6.1.1 主题切换
+
+Milkdown 编辑器通过 CSS class（`milkdown-dark`）切换暗色主题，无需销毁重建 EditorView，
+切换标签时保持光标位置和选区。
+
 ### 6.2 插件体系
 
 | 插件 | 说明 |
@@ -351,7 +365,7 @@ npm run build:portable  # 便携版（免安装）
 | zustand | ^5.0 | 状态管理 |
 | dexie | ^4.0 | IndexedDB 封装 |
 | nanoid | ^5.0 | 唯一 ID 生成 |
-| @codemirror/* | ^6.x | 代码编辑器 |
+| @milkdown/* | 7.21.1 | WYSIWYG Markdown 编辑器（基于 ProseMirror） |
 | unified / remark / rehype | ^11.0 | Markdown 渲染管线 |
 | rehype-highlight | ^7.0 | 代码语法高亮 |
 

README.md

@@ -14,7 +14,7 @@
   <img src="https://img.shields.io/badge/TypeScript-5.6-3178C6?style=flat-square&logo=typescript" alt="TypeScript">
   <img src="https://img.shields.io/badge/React-18-61DAFB?style=flat-square&logo=react" alt="React">
   <img src="https://img.shields.io/badge/License-MIT-green?style=flat-square" alt="License">
-  <img src="https://img.shields.io/badge/Version-v0.3.12-orange?style=flat-square" alt="Version">
+  <img src="https://img.shields.io/badge/Version-v0.3.13-orange?style=flat-square" alt="Version">
 </p>
 
 <p align="center">
@@ -55,7 +55,7 @@
 
 ```bash
 # 克隆仓库
-git clone https://gitee.com/thzxx/MarkLite.git
+git clone https://git.metona.cn/MetonaTeam/MarkLite.git
 cd MarkLite
 
 # 安装依赖
@@ -277,7 +277,7 @@ npm run prepare
 
 ## 📄 许可证
 
-[MIT License](LICENSE) © 2026 [thzxx](https://gitee.com/thzxx)
+[MIT License](LICENSE) © 2026 [thzxx](https://git.metona.cn/thzxx)
 
 ---
 

docs/optimization-delivery-report.json

@@ -127,10 +127,11 @@
     },
     "codemirrorThemeCompartment": {
       "id": "PF-04",
-      "mechanism": "CodeMirror Compartment.reconfigure()",
+      "mechanism": "Milkdown CSS class 切换（milkdown-dark）",
-      "implementation": "src/renderer/components/Editor/useCodeMirror.ts",
+      "implementation": "src/renderer/components/Editor/useMilkdown.ts",
-      "description": "创建 themeCompartment，darkMode 变化时通过 reconfigure() 交换主题扩展，不重建 EditorView",
+      "description": "darkMode 变化时切换 milkdown-dark CSS class，无需销毁重建 EditorView",
-      "expectedImprovement": "主题切换零闪烁，无需销毁重建编辑器实例，保持光标和滚动位置"
+      "expectedImprovement": "主题切换零闪烁，无需销毁重建编辑器实例，保持光标和滚动位置",
+      "note": "项目已从 CodeMirror 6 迁移至 Milkdown v7 WYSIWYG 编辑器，原 Compartment 方案不再适用"
     },
     "previewDebounce": {
       "id": "PF-05",

docs/optimization-requirements.json

@@ -8,7 +8,7 @@
     "typescript": "5.6.3",
     "vite": "electron-vite 3.0.0",
     "stateManagement": "zustand 5.0.6",
-    "editor": "CodeMirror 6",
+    "editor": "Milkdown 7.21.1 (WYSIWYG) + textarea (source mode)",
     "database": "Dexie (IndexedDB)"
   },
   "currentStatus": {
@@ -46,7 +46,11 @@
           "effort": "small",
           "details": {
             "configFormat": "ESM flat config (eslint.config.js)",
-            "plugins": ["@typescript-eslint/eslint-plugin", "eslint-plugin-react-hooks", "eslint-plugin-react-refresh"],
+            "plugins": [
+              "@typescript-eslint/eslint-plugin",
+              "eslint-plugin-react-hooks",
+              "eslint-plugin-react-refresh"
+            ],
             "rules": [
               "typescript-eslint/recommended",
               "react-hooks/recommended",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "marklite",
-  "version": "0.3.12",
+  "version": "0.3.13",
   "description": "Lightweight Markdown Editor for Windows",
   "main": "./dist/main/index.js",
   "scripts": {
@@ -41,6 +41,7 @@
     "@milkdown/react": "7.21.1",
     "@milkdown/utils": "7.21.1",
     "dexie": "^4.0.11",
+    "metona-toast": "file:../MetonaToast",
     "nanoid": "^5.1.5",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",

src/renderer/App.tsx

@@ -12,7 +12,6 @@ import { useFileOperations } from './hooks/useFileOperations'
 import { useDragDrop } from './hooks/useDragDrop'
 import { useAutoSave } from './hooks/useAutoSave'
 import { useIpcListeners } from './hooks/useIpcListeners'
-import { useToast } from './hooks/useToast'
 import { useConfirm } from './hooks/useConfirm'
 import { useDefaultStatusBarItems } from './hooks/useStatusBarItems'
 import { useStatusBarItem } from './hooks/useStatusBarItem'
@@ -26,7 +25,6 @@ import { Preview } from './components/Preview/Preview'
 import { Sidebar } from './components/Sidebar/Sidebar'
 import { StatusBar } from './components/StatusBar/StatusBar'
 import { WelcomeScreen } from './components/WelcomeScreen/WelcomeScreen'
-import { ToastContainer } from './components/Toast/Toast'
 import { ModifiedBanner } from './components/ModifiedBanner/ModifiedBanner'
 import { DropOverlay } from './components/DropOverlay/DropOverlay'
 import { ErrorBoundary } from './components/ErrorBoundary'
@@ -64,16 +62,15 @@ export function App() {
   const setExternallyModified = useEditorStore(s => s.setExternallyModified)
   const { darkMode, toggleDarkMode } = useTheme()
   const { saveViewMode } = useSettings()
-  const { toasts, showToast, dismissToast, cleanup } = useToast()
   const { confirm, confirmDialogProps } = useConfirm()
   const [showAbout, setShowAbout] = useState(false)
   const handleCloseAbout = useCallback(() => setShowAbout(false), [])
 
   useSettingsInit()
-  useEffect(() => { loadFromDB(); return cleanup }, [loadFromDB, cleanup])
+  useEffect(() => { loadFromDB() }, [loadFromDB])
 
-  const { handleOpenFile, handleSave, handleSaveAs, handleOpenRecent } = useFileOperations(showToast)
+  const { handleOpenFile, handleSave, handleSaveAs, handleOpenRecent } = useFileOperations()
-  useDragDrop(showToast)
+  useDragDrop()
   useFileWatch()
   useAutoSave()
 
@@ -152,7 +149,6 @@ export function App() {
           </div>
         </div>
         <StatusBar />
-        <ToastContainer toasts={toasts} onDismiss={dismissToast} />
         <DropOverlay />
         {showAbout && <AboutDialog onClose={handleCloseAbout} />}
         <ConfirmDialog {...confirmDialogProps} />

src/renderer/components/AboutDialog/AboutDialog.tsx

@@ -10,9 +10,9 @@ export const AboutDialog = React.memo(function AboutDialog({ onClose }: AboutDia
   const handleLinkClick = (e: React.MouseEvent<HTMLAnchorElement>): void => {
     e.preventDefault()
     if (window.electronAPI?.openExternal) {
-      window.electronAPI.openExternal('https://gitee.com/thzxx/MarkLite')
+      window.electronAPI.openExternal('https://git.metona.cn/MetonaTeam/MarkLite')
     } else {
-      window.open('https://gitee.com/thzxx/MarkLite', '_blank')
+      window.open('https://git.metona.cn/MetonaTeam/MarkLite', '_blank')
     }
   }
 
@@ -41,7 +41,7 @@ export const AboutDialog = React.memo(function AboutDialog({ onClose }: AboutDia
         <div className="about-footer">
           <a className="about-link" href="#" onClick={handleLinkClick}>
             <Gitee size={16} />
-            <span>gitee.com/thzxx/MarkLite</span>
+            <span>git.metona.cn/MetonaTeam/MarkLite</span>
           </a>
           <p>基于 Electron + React + TypeScript 构建</p>
           <p className="about-copyright">© 2026 thzxx</p>

src/renderer/components/Editor/Editor.tsx

@@ -53,7 +53,7 @@ export const Editor = React.memo(function Editor({ darkMode }: EditorProps) {
         setContent(activeTab.content)
         requestAnimationFrame(() => {
           setScrollTop(activeTab.scrollTop)
-          setSelection()
+          setSelection(activeTab.selectionStart, activeTab.selectionEnd)
         })
       })
     }

src/renderer/components/Editor/useMilkdown.ts

@@ -286,13 +286,30 @@ export function useMilkdown({ content, onChange, darkMode }: UseMilkdownOptions)
     }
   }, [])
 
-  const setSelection = useCallback(() => {
+  const setSelection = useCallback((from?: number, to?: number) => {
-    // ProseMirror selection setting requires the view instance
+    const editor = editorRef.current
-    // which we access lazily; for now we focus the editor
+    if (!editor) return
+    try {
+      editor.action((ctx) => {
+        const view = ctx.get(editorViewCtx)
+        if (!view) return
+        const docSize = view.state.doc.content.size
+        // 恢复保存的选区，越界时夹紧到文档末尾
+        const safeFrom = Math.min(from ?? 0, docSize)
+        const safeTo = Math.min(to ?? safeFrom, docSize)
+        const tr = view.state.tr.setSelection(
+          TextSelection.create(view.state.doc, safeFrom, safeTo)
+        )
+        view.dispatch(tr)
+        view.focus()
+      })
+    } catch {
+      // 编辑器未就绪或选区无效，回退到仅 focus
       const container = containerRef.current
       if (!container) return
       const pmEditor = container.querySelector('.ProseMirror') as HTMLElement | null
       pmEditor?.focus()
+    }
   }, [])
 
   // Get ProseMirror EditorView instance

src/renderer/components/SearchReplace/SearchReplace.tsx

@@ -254,7 +254,6 @@ export const SearchReplace = memo(function SearchReplace({
     // 重新搜索以获取匹配的最新位置
     const freshMatches = findMatches(view.state.doc, queryRef.current, caseSensitiveRef.current, useRegexRef.current)
     if (freshMatches.length === 0) return
-    if (freshMatches.length === 0) return
 
     // 从后往前替换以保持位置正确
     const tr = view.state.tr

src/renderer/components/Toast/Toast.tsx

@@ -1,103 +0,0 @@
-import React, { useState, useEffect, useCallback, useRef } from 'react'
-
-/** Toast 类型 */
-export type ToastType = 'success' | 'error' | 'warning' | 'info'
-
-/** 单条 Toast 数据 */
-export interface ToastItem {
-  id: string
-  message: string
-  type: ToastType
-  duration: number
-}
-
-/** Toast 容器组件属性 */
-interface ToastContainerProps {
-  toasts: ToastItem[]
-  onDismiss: (id: string) => void
-}
-
-/** 单条 Toast 组件 */
-const SingleToast = React.memo(function SingleToast({
-  toast,
-  onDismiss
-}: {
-  toast: ToastItem
-  onDismiss: (id: string) => void
-}) {
-  const [visible, setVisible] = useState(false)
-  const timerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
-
-  useEffect(() => {
-    // 进入动画
-    requestAnimationFrame(() => setVisible(true))
-
-    // 自动消失
-    if (toast.duration > 0) {
-      timerRef.current = setTimeout(() => {
-        setVisible(false)
-        // 等待退出动画完成后再移除
-        setTimeout(() => onDismiss(toast.id), 300)
-      }, toast.duration)
-    }
-
-    return () => {
-      if (timerRef.current) clearTimeout(timerRef.current)
-    }
-  }, [toast.id, toast.duration, onDismiss])
-
-  const handleClose = useCallback(() => {
-    if (timerRef.current) clearTimeout(timerRef.current)
-    setVisible(false)
-    setTimeout(() => onDismiss(toast.id), 300)
-  }, [toast.id, onDismiss])
-
-  const typeIcons: Record<ToastType, string> = {
-    success: '✓',
-    error: '✕',
-    warning: '⚠',
-    info: 'ℹ'
-  }
-
-  return (
-    <div
-      className={`toast-item toast-${toast.type} ${visible ? 'toast-visible' : ''}`}
-      role="alert"
-      aria-live="assertive"
-    >
-      <span className="toast-icon" aria-hidden="true">
-        {typeIcons[toast.type]}
-      </span>
-      <span className="toast-message">{toast.message}</span>
-      <button
-        className="toast-close"
-        onClick={handleClose}
-        aria-label="关闭通知"
-        type="button"
-      >
-        ✕
-      </button>
-    </div>
-  )
-})
-
-/**
- * UX-05: Toast 容器组件
- * 支持多条堆叠、类型区分、关闭按钮和自动消失
- */
-export const ToastContainer = React.memo(function ToastContainer({
-  toasts,
-  onDismiss
-}: ToastContainerProps) {
-  if (toasts.length === 0) return null
-
-  return (
-    <div className="toast-container" aria-label="通知区域">
-      {toasts.map(toast => (
-        <SingleToast key={toast.id} toast={toast} onDismiss={onDismiss} />
-      ))}
-    </div>
-  )
-})
-
-ToastContainer.displayName = 'ToastContainer'

src/renderer/components/Toast/index.ts

@@ -1,2 +0,0 @@
-export { ToastContainer } from './Toast'
-export type { ToastType, ToastItem } from './Toast'

src/renderer/hooks/useActiveHeading.ts

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState, useCallback } from 'react'
+import { useEffect, useState, useCallback } from 'react'
 
 /**
  * D4: 基于视口的活跃标题追踪 hook
@@ -16,7 +16,6 @@ export function useActiveHeading(
   headings: { level: number; text: string }[]
 ): number | null {
   const [activeIndex, setActiveIndex] = useState<number | null>(null)
-  const observerRef = useRef<IntersectionObserver | null>(null)
 
   const handleScroll = useCallback(() => {
     const container = containerRef.current
@@ -71,10 +70,8 @@ export function useActiveHeading(
     // 初始计算
     handleScroll()
 
-    const observer = observerRef.current
     return () => {
       container.removeEventListener('scroll', handleScroll)
-      observer?.disconnect()
     }
   }, [containerRef, headings, handleScroll])
 

src/renderer/hooks/useDragDrop.ts

@@ -3,8 +3,9 @@ import { useTabStore } from '../stores/tabStore'
 import { isAllowedFile } from '../lib/fileUtils'
 import { MAX_FILE_SIZE } from '../lib/constants'
 import { logError } from '../lib/errorHandler'
+import { showToast } from '../lib/toast'
 
-export function useDragDrop(showToast: (msg: string) => void) {
+export function useDragDrop() {
   const createTab = useTabStore(s => s.createTab)
 
   const handleDrop = useCallback(async (e: DragEvent) => {
@@ -50,7 +51,7 @@ export function useDragDrop(showToast: (msg: string) => void) {
     if (rejected > 0) {
       showToast(`仅支持 .md / .markdown / .txt 文件，已忽略 ${rejected} 个文件`)
     }
-  }, [createTab, showToast])
+  }, [createTab])
 
   useEffect(() => {
     const prevent = (e: DragEvent) => {

src/renderer/hooks/useFileOperations.ts

@@ -3,13 +3,13 @@ import { useTabStore } from '../stores/tabStore'
 import { useEditorStore } from '../stores/editorStore'
 import { recentFilesRepository } from '../db/recentFilesRepository'
 import { logError } from '../lib/errorHandler'
-import type { ToastType } from '../components/Toast/Toast'
+import { showToast } from '../lib/toast'
 
 /**
  * AR-01: 从 App.tsx 提取的文件操作逻辑
  * UX-02: 添加 loading 状态指示
  */
-export function useFileOperations(showToast: (msg: string, type?: ToastType) => void) {
+export function useFileOperations() {
   const createTab = useTabStore(s => s.createTab)
   const getActiveTab = useTabStore(s => s.getActiveTab)
   const setLoading = useEditorStore(s => s.setLoading)
@@ -30,7 +30,7 @@ export function useFileOperations(showToast: (msg: string, type?: ToastType) =>
     } finally {
       setLoading('file-open', false)
     }
-  }, [createTab, showToast, setLoading])
+  }, [createTab, setLoading])
 
   const handleSave = useCallback(async (): Promise<void> => {
     try {
@@ -48,7 +48,7 @@ export function useFileOperations(showToast: (msg: string, type?: ToastType) =>
       logError('保存文件失败', error)
       showToast('保存失败', 'error')
     }
-  }, [getActiveTab, showToast])
+  }, [getActiveTab])
 
   const handleSaveAs = useCallback(async (): Promise<void> => {
     try {
@@ -63,7 +63,7 @@ export function useFileOperations(showToast: (msg: string, type?: ToastType) =>
       logError('另存为失败', error)
       showToast('另存为失败', 'error')
     }
-  }, [getActiveTab, showToast])
+  }, [getActiveTab])
 
   const handleOpenRecent = useCallback(async (filePath: string): Promise<void> => {
     if (!window.electronAPI) return

src/renderer/hooks/useKeyboard.ts

@@ -23,24 +23,26 @@ export function useKeyboard(handleOpenFile: () => void, handleSave: () => void,
       return
     }
 
-    // Ctrl+Tab / Ctrl+Shift+Tab
+    // Ctrl+Tab / Ctrl+Shift+Tab — MRU 顺序切换
     if (isCtrl && e.key === 'Tab') {
       e.preventDefault()
       const { tabs, activeTabId, mruStack } = tabState
       if (tabs.length > 1) {
-        if (e.shiftKey) {
+        // mruStack[0] 是最近一个被切走的标签（即上一个活动标签）
         if (mruStack.length > 0) {
           const targetId = mruStack[0]
           if (tabs.find(t => t.id === targetId)) {
             tabState.switchToTab(targetId)
+            return
           }
         }
-        } else {
+        // MRU 栈为空或不合法时回退到顺序切换
         const idx = tabs.findIndex(t => t.id === activeTabId)
-          const next = (idx + 1) % tabs.length
+        const next = e.shiftKey
+          ? (idx - 1 + tabs.length) % tabs.length
+          : (idx + 1) % tabs.length
         tabState.switchToTab(tabs[next].id)
       }
-      }
       return
     }
   }, [handleOpenFile, handleSave, handleSaveAs, setViewMode])

src/renderer/hooks/useSidebarResize.ts

@@ -1,7 +1,11 @@
 import { useState, useRef, useEffect } from 'react'
+import { useSidebarStore } from '../stores/sidebarStore'
 
 /**
  * AR-02: 从 Sidebar.tsx 提取的 resize 逻辑
+ *
+ * 拖拽过程中直接操作 DOM 宽度（避免每次 mousemove 触发 store 更新+重渲染），
+ * 拖拽结束时将最终宽度同步到 sidebarStore（持久化到 IndexedDB）。
  */
 export function useSidebarResize() {
   const [isResizing, setIsResizing] = useState(false)
@@ -17,7 +21,15 @@ export function useSidebarResize() {
       }
     }
 
-    const handleMouseUp = (): void => setIsResizing(false)
+    const handleMouseUp = (): void => {
+      // 拖拽结束时将最终宽度持久化到 store（→ IndexedDB）
+      if (sidebarRef.current) {
+        const width = sidebarRef.current.offsetWidth
+        const clamped = Math.max(180, Math.min(500, width))
+        useSidebarStore.getState().setSidebarWidth(clamped)
+      }
+      setIsResizing(false)
+    }
 
     document.addEventListener('mousemove', handleMouseMove)
     document.addEventListener('mouseup', handleMouseUp)

src/renderer/hooks/useTheme.ts

@@ -1,6 +1,7 @@
 import { useEffect } from 'react'
 import { useEditorStore } from '../stores/editorStore'
 import { settingsRepository } from '../db/settingsRepository'
+import { syncToastTheme } from '../lib/toast'
 
 /**
  * AR-04: 主题 hook
@@ -15,6 +16,7 @@ export function useTheme() {
   useEffect(() => {
     document.documentElement.classList.toggle('dark', darkMode)
     settingsRepository.save({ darkMode })
+    syncToastTheme(darkMode)
   }, [darkMode])
 
   return { darkMode, toggleDarkMode }

src/renderer/hooks/useToast.ts

@@ -1,45 +0,0 @@
-import { useState, useCallback } from 'react'
-import type { ToastItem, ToastType } from '../components/Toast/Toast'
-
-/** 默认自动消失时间 (ms) */
-const DEFAULT_DURATION = 3000
-
-/** 最大同时显示数量 */
-const MAX_TOASTS = 5
-
-// Module-level counter survives component remounts
-let toastCounter = 0
-
-/**
- * UX-05: 升级版 Toast 状态管理 hook
- * 支持多条堆叠、类型区分、自动消失
- */
-export function useToast() {
-  const [toasts, setToasts] = useState<ToastItem[]>([])
-
-  const showToast = useCallback((msg: string, type: ToastType = 'info', duration = DEFAULT_DURATION) => {
-    const id = `toast-${++toastCounter}`
-    const newToast: ToastItem = { id, message: msg, type, duration }
-
-    setToasts(prev => {
-      const next = [...prev, newToast]
-      // 超过最大数量时移除最旧的
-      if (next.length > MAX_TOASTS) {
-        return next.slice(next.length - MAX_TOASTS)
-      }
-      return next
-    })
-
-    return id
-  }, [])
-
-  const dismissToast = useCallback((id: string) => {
-    setToasts(prev => prev.filter(t => t.id !== id))
-  }, [])
-
-  const cleanup = useCallback(() => {
-    setToasts([])
-  }, [])
-
-  return { toasts, showToast, dismissToast, cleanup }
-}

src/renderer/lib/toast.ts

@@ -0,0 +1,41 @@
+import MeToast from 'metona-toast'
+
+/**
+ * MeToast 全局配置
+ *
+ * 替代原自研 Toast 组件（components/Toast），由 MeToast 接管全部通知渲染。
+ * MeToast 自管理 DOM 与样式，无需在 React 树中挂载容器组件。
+ */
+MeToast.configure({
+  position: 'top-right',
+  duration: 3000,
+  max: 5,
+  theme: 'auto',
+  animation: 'slide',
+  pauseOnHover: true,
+  closeOnClick: true,
+  showProgress: true,
+  draggable: true,
+  locale: 'zh-CN',
+})
+
+/** 与原 showToast 保持兼容的类型子集 */
+export type ToastType = 'success' | 'error' | 'warning' | 'info'
+
+/**
+ * 显示 Toast 通知 — 与原 useToast().showToast 签名兼容。
+ *
+ * @param msg      消息内容
+ * @param type     通知类型（默认 info）
+ * @param duration 显示时长(ms)，省略则用全局默认值
+ */
+export function showToast(msg: string, type: ToastType = 'info', duration?: number): void {
+  MeToast[type](msg, duration !== undefined ? { duration } : undefined)
+}
+
+/** 同步 MeToast 主题到当前暗色模式 */
+export function syncToastTheme(darkMode: boolean): void {
+  MeToast.themes.switchTheme(darkMode ? 'dark' : 'light')
+}
+
+export { MeToast }

src/renderer/styles/global.css

@@ -388,14 +388,6 @@ body {
   background: var(--text-secondary);
 }
 
-#tab-list::-webkit-scrollbar-track {
-  background: var(--bg-tertiary);
-}
-
-#tab-list::-webkit-scrollbar-thumb:hover {
-  background: var(--text-tertiary);
-}
-
 #tab-list::-webkit-scrollbar-track {
   background: transparent;
 }
@@ -1006,35 +998,6 @@ body {
   display: none;
 }
 
-/* Toast */
-#toast-notification {
-  position: fixed;
-  bottom: 40px;
-  left: 50%;
-  transform: translateX(-50%) translateY(20px);
-  background: var(--text);
-  color: var(--bg);
-  padding: 8px 20px;
-  border-radius: 6px;
-  font-size: 13px;
-  font-family: var(--font-ui);
-  box-shadow: var(--shadow-lg);
-  opacity: 0;
-  pointer-events: none;
-  transition:
-    opacity 0.3s ease,
-    transform 0.3s ease;
-  z-index: 9999;
-  max-width: 480px;
-  text-align: center;
-}
-
-#toast-notification.show {
-  opacity: 1;
-  transform: translateX(-50%) translateY(0);
-  pointer-events: auto;
-}
-
 /* Scrollbar */
 ::-webkit-scrollbar {
   width: 8px;
@@ -1371,138 +1334,6 @@ body {
   animation: spin 0.8s linear infinite;
 }
 
-/* ===== UX-05: Toast Container (升级版) ===== */
-.toast-container {
-  position: fixed;
-  bottom: 44px;
-  left: 50%;
-  transform: translateX(-50%);
-  display: flex;
-  flex-direction: column-reverse;
-  gap: 8px;
-  z-index: 9999;
-  pointer-events: none;
-  max-width: 480px;
-  width: 100%;
-  padding: 0 16px;
-}
-
-.toast-item {
-  display: flex;
-  align-items: center;
-  gap: 10px;
-  padding: 10px 16px;
-  border-radius: 8px;
-  font-size: 13px;
-  font-family: var(--font-ui);
-  box-shadow: var(--shadow-lg);
-  opacity: 0;
-  transform: translateY(10px) scale(0.95);
-  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-  pointer-events: auto;
-  max-width: 100%;
-}
-
-.toast-item.toast-visible {
-  opacity: 1;
-  transform: translateY(0) scale(1);
-}
-
-/* Toast 类型样式 */
-.toast-success {
-  background: #e6f4ea;
-  color: #137333;
-  border: 1px solid #a8dab5;
-}
-
-.toast-error {
-  background: #fce8e6;
-  color: #c5221f;
-  border: 1px solid #f28b82;
-}
-
-.toast-warning {
-  background: #fef7e0;
-  color: #945700;
-  border: 1px solid #fdd663;
-}
-
-.toast-info {
-  background: var(--text);
-  color: var(--bg);
-  border: 1px solid transparent;
-}
-
-:root.dark .toast-success {
-  background: #0d3a1a;
-  color: #81c995;
-  border-color: #1e5a2e;
-}
-
-:root.dark .toast-error {
-  background: #3c1214;
-  color: #f28b82;
-  border-color: #5c1a1a;
-}
-
-:root.dark .toast-warning {
-  background: #3a3000;
-  color: #fdd663;
-  border-color: #5a4a00;
-}
-
-:root.dark .toast-info {
-  background: var(--bg-secondary);
-  color: var(--text);
-  border-color: var(--border);
-}
-
-.toast-icon {
-  flex-shrink: 0;
-  width: 18px;
-  height: 18px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  font-size: 14px;
-  font-weight: 700;
-}
-
-.toast-message {
-  flex: 1;
-  min-width: 0;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.toast-close {
-  flex-shrink: 0;
-  width: 20px;
-  height: 20px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border: none;
-  background: transparent;
-  color: inherit;
-  opacity: 0.6;
-  cursor: pointer;
-  font-size: 12px;
-  border-radius: 4px;
-  padding: 0;
-  transition: opacity 0.15s ease;
-}
-
-.toast-close:hover {
-  opacity: 1;
-}
-
-.toast-close:focus-visible {
-  outline: 2px solid currentColor;
-  outline-offset: 1px;
-}
-
 /* ===== UX-07: 通用可访问性增强 ===== */
 
 /* Focus visible 为所有交互元素提供清晰的焦点指示 */

src/shared/constants.ts

@@ -1,5 +1,5 @@
 // 共享常量 — 主进程和渲染进程共用
-export const APP_VERSION = 'v0.3.12'
+export const APP_VERSION = 'v0.3.13'
 export const MAX_FILE_SIZE = 20 * 1024 * 1024 // 20MB
 export const ALLOWED_EXTENSIONS = ['.md', '.markdown', '.txt'] as const
 export const SKIP_DIRS = new Set([