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>

tests/unit/string-list.test.ts

@@ -0,0 +1,91 @@
+import { describe, it, expect } from 'vitest';
+import { StringList } from '../../src/core/string-list';
+
+describe('StringList', () => {
+  it('初始为空', () => {
+    const list = new StringList();
+    expect(list.length).toBe(0);
+  });
+
+  it('添加和读取元素', () => {
+    const list = new StringList();
+    list.add('C:\\Windows');
+    list.add('C:\\Users');
+    expect(list.length).toBe(2);
+    expect(list.get(0)).toBe('C:\\Windows');
+    expect(list.get(1)).toBe('C:\\Users');
+    expect(list.get(99)).toBeUndefined();
+  });
+
+  it('在指定位置插入', () => {
+    const list = new StringList();
+    list.add('a');
+    list.add('c');
+    list.insertAt(1, 'b');
+    expect(list.toArray()).toEqual(['a', 'b', 'c']);
+  });
+
+  it('在开头插入', () => {
+    const list = StringList.fromArray(['b', 'c']);
+    list.insertAt(0, 'a');
+    expect(list.toArray()).toEqual(['a', 'b', 'c']);
+  });
+
+  it('删除指定位置', () => {
+    const list = StringList.fromArray(['a', 'b', 'c']);
+    list.removeAt(1);
+    expect(list.toArray()).toEqual(['a', 'c']);
+  });
+
+  it('设置元素', () => {
+    const list = StringList.fromArray(['old']);
+    list.set(0, 'new');
+    expect(list.get(0)).toBe('new');
+  });
+
+  it('不区分大小写查找', () => {
+    const list = StringList.fromArray(['C:\\Windows', 'C:\\Users']);
+    expect(list.contains('c:\\windows')).toBe(true);
+    expect(list.contains('C:\\WINDOWS')).toBe(true);
+    expect(list.contains('C:\\Other')).toBe(false);
+  });
+
+  it('不区分大小写索引', () => {
+    const list = StringList.fromArray(['C:\\Windows', 'C:\\Users']);
+    expect(list.indexOfIgnoreCase('c:\\windows')).toBe(0);
+    expect(list.indexOfIgnoreCase('c:\\users')).toBe(1);
+    expect(list.indexOfIgnoreCase('nope')).toBe(-1);
+  });
+
+  it('交换元素', () => {
+    const list = StringList.fromArray(['a', 'b']);
+    list.swap(0, 1);
+    expect(list.toArray()).toEqual(['b', 'a']);
+  });
+
+  it('清空', () => {
+    const list = StringList.fromArray(['a', 'b', 'c']);
+    list.clear();
+    expect(list.length).toBe(0);
+  });
+
+  it('深拷贝', () => {
+    const original = StringList.fromArray(['a', 'b']);
+    const cloned = original.clone();
+    cloned.set(0, 'modified');
+    expect(original.get(0)).toBe('a');
+    expect(cloned.get(0)).toBe('modified');
+  });
+
+  it('fromArray 和 toArray', () => {
+    const arr = ['x', 'y', 'z'];
+    const list = StringList.fromArray(arr);
+    expect(list.toArray()).toEqual(arr);
+    expect(list.length).toBe(3);
+  });
+
+  it('all 返回只读数组', () => {
+    const list = StringList.fromArray(['a', 'b']);
+    expect(list.all).toEqual(['a', 'b']);
+  });
+});