refactor: v2.0 全量重构 — TypeScript + React + Zustand + IndexedDB

技术栈升级：
- JavaScript → TypeScript 5.6（全量类型安全）
- 原生 DOM → React 18（函数组件 + Hooks）
- 全局变量 → Zustand 5（轻量状态管理）
- localStorage → IndexedDB / Dexie.js 4（大容量、异步、索引）
- marked.js → unified / remark / rehype（插件化渲染管线）
- 无打包 → electron-vite 3（HMR 热更新）
- 纯 CSS → CSS Variables + CSS Modules

新增功能：
- 标签页状态 IndexedDB 持久化（关闭后可恢复）
- 最近打开文件列表
- 大文件虚拟化行号（>2000 行）
- 搜索高亮二分查找优化 O(log N)
- rehype-sanitize HTML 安全过滤

文件结构：
- 7 个源文件 → 51 个模块化文件
- src/main/     主进程（6 文件）
- src/preload/  预加载（1 文件）
- src/renderer/ 渲染进程（42 文件：组件/hooks/stores/lib/db/types/styles）
- src/shared/   共享类型（2 文件）

构建验证：
- TypeScript 检查零错误
- electron-vite build 成功
- 产物：main 15kB + preload 2kB + renderer 1.5MB

package.json

@@ -1,18 +1,44 @@
 {
   "name": "marklite",
-  "version": "1.2.1",
-  "description": "Lightweight Markdown Reader for Windows",
-  "main": "main.js",
+  "version": "2.0.0",
+  "description": "Lightweight Markdown Editor for Windows",
+  "main": "./dist/main/index.js",
   "scripts": {
-    "start": "electron .",
-    "build": "electron-builder --win",
-    "build:portable": "electron-builder --win portable"
+    "dev": "electron-vite dev",
+    "build": "electron-vite build && electron-builder --win",
+    "build:portable": "electron-vite build && electron-builder --win portable",
+    "lint": "eslint src --ext .ts,.tsx",
+    "typecheck": "tsc --noEmit"
   },
   "author": "MarkLite",
   "license": "MIT",
+  "dependencies": {
+    "dexie": "^4.0.11",
+    "nanoid": "^5.1.5",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "rehype-highlight": "^7.0.2",
+    "rehype-raw": "^7.0.0",
+    "rehype-sanitize": "^6.0.0",
+    "rehype-stringify": "^10.0.0",
+    "remark-gfm": "^4.0.1",
+    "remark-parse": "^11.0.0",
+    "remark-rehype": "^11.1.2",
+    "unified": "^11.0.5",
+    "zustand": "^5.0.6"
+  },
   "devDependencies": {
-    "electron": "^28.0.0",
-    "electron-builder": "^24.9.1"
+    "@types/react": "^18.3.18",
+    "@types/react-dom": "^18.3.5",
+    "@typescript-eslint/eslint-plugin": "^8.26.1",
+    "@vitejs/plugin-react": "^4.3.4",
+    "electron": "^28.3.3",
+    "electron-builder": "^25.1.8",
+    "electron-vite": "^3.0.0",
+    "eslint": "^9.22.0",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-react-refresh": "^0.4.19",
+    "typescript": "^5.6.3"
   },
   "build": {
     "appId": "com.marklite.app",
@@ -21,10 +47,7 @@
       "output": "dist"
     },
     "files": [
-      "main.js",
-      "preload.js",
-      "renderer/**/*",
-      "lib/**/*",
+      "dist/**/*",
       "assets/**/*"
     ],
     "win": {