feat: 重写为 Tauri + React + TypeScript (v4.0)

完全移除旧 C+IUP 代码，改用 Tauri 2.x + React 19 + TypeScript + Rust 技术栈重写。
功能与 v3.1 完全等价：

- React 前端：Tailwind CSS 4、Zustand 状态管理、i18next 国际化
- Rust 后端：winreg 注册表读写、Win32 API FFI 调用
- 核心逻辑：StringList、UndoRedoManager、PathManager、Import/Export
- 深色模式、中英文切换、键盘快捷键、合并预览
- 66 个 Vitest 单元测试

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -0,0 +1,42 @@
+{
+  "name": "v4.0",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest"
+  },
+  "dependencies": {
+    "@tailwindcss/vite": "^4.3.0",
+    "@tauri-apps/api": "^2.11.0",
+    "@tauri-apps/plugin-dialog": "^2.7.1",
+    "i18next": "^26.2.0",
+    "i18next-browser-languagedetector": "^8.2.1",
+    "react": "^19.2.6",
+    "react-dom": "^19.2.6",
+    "react-i18next": "^17.0.8",
+    "tailwindcss": "^4.3.0",
+    "zustand": "^5.0.13"
+  },
+  "devDependencies": {
+    "@eslint/js": "^10.0.1",
+    "@tauri-apps/cli": "^2.11.2",
+    "@types/node": "^24.12.3",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^6.0.1",
+    "eslint": "^10.3.0",
+    "eslint-plugin-react-hooks": "^7.1.1",
+    "eslint-plugin-react-refresh": "^0.5.2",
+    "globals": "^17.6.0",
+    "typescript": "~6.0.2",
+    "typescript-eslint": "^8.59.2",
+    "vite": "^8.0.12",
+    "vitest": "^4.1.7"
+  }
+}