v0.2.0: 全面代码质量优化

- ESLint flat config + Prettier + EditorConfig
- Markdown处理器LRU缓存
- Zustand选择器优化减少重渲染
- CodeMirror Compartment主题热切换
- Preview防抖(150ms) + IndexedDB去抖(500ms)
- 组件拆分: App.tsx 310→104行, Sidebar.tsx 244→90行
- 统一错误处理 errorHandler.ts
- ConfirmDialog替代原生confirm
- LoadingSpinner加载状态
- Toast多条堆叠+类型区分
- 可访问性增强(ARIA属性、键盘导航)
- Vitest测试框架(78个测试用例)
- Git hooks(husky + lint-staged)
- 项目文档(README.md, CONTRIBUTING.md)

package.json

@@ -1,14 +1,29 @@
 {
   "name": "marklite",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "description": "Lightweight Markdown Editor for Windows",
   "main": "./dist/main/index.js",
   "scripts": {
     "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"
+    "lint": "eslint src/",
+    "format": "prettier --write \"src/**/*.{ts,tsx,js,jsx,json,css,md}\"",
+    "format:check": "prettier --check \"src/**/*.{ts,tsx,js,jsx,json,css,md}\"",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage",
+    "prepare": "husky"
+  },
+  "lint-staged": {
+    "*.{ts,tsx}": [
+      "eslint --fix",
+      "tsc --noEmit --pretty"
+    ],
+    "*.{json,css,md}": [
+      "prettier --write"
+    ]
   },
   "author": "MarkLite",
   "license": "MIT",
@@ -36,6 +51,9 @@
     "zustand": "^5.0.6"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@types/jsdom": "^28.0.3",
     "@types/react": "^18.3.18",
     "@types/react-dom": "^18.3.5",
     "@typescript-eslint/eslint-plugin": "^8.26.1",
@@ -46,7 +64,13 @@
     "eslint": "^9.22.0",
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.19",
-    "typescript": "^5.6.3"
+    "husky": "^9.1.7",
+    "jsdom": "^29.1.1",
+    "lint-staged": "^17.0.7",
+    "prettier": "^3.8.3",
+    "typescript": "^5.6.3",
+    "typescript-eslint": "^8.60.1",
+    "vitest": "^4.1.8"
   },
   "build": {
     "appId": "com.marklite.app",