feat: 添加 Tauri 桌面应用

- 创建 packages/desktop 模块
- 实现 Tauri 2.0 + React 桌面应用
- 复用 Web 前端代码
- 添加系统托盘功能
- 实现本地文件访问命令
- 配置 Vite + Tauri 集成
- 更新 .gitignore 添加 Rust/Tauri 相关规则

packages/desktop/src/lib/tauri.ts

@@ -0,0 +1,40 @@
+import { invoke } from '@tauri-apps/api/core';
+
+export interface AppInfo {
+  name: string;
+  version: string;
+  tauri_version: string;
+}
+
+export interface FileContent {
+  path: string;
+  content: string;
+  size: number;
+}
+
+export interface DirectoryEntry {
+  name: string;
+  path: string;
+  is_dir: boolean;
+  size: number;
+}
+
+export async function getAppInfo(): Promise<AppInfo> {
+  return invoke('get_app_info');
+}
+
+export async function openDirectoryDialog(): Promise<string | null> {
+  return invoke('open_directory_dialog');
+}
+
+export async function readLocalFile(path: string): Promise<FileContent> {
+  return invoke('read_local_file', { path });
+}
+
+export async function listDirectory(path: string): Promise<DirectoryEntry[]> {
+  return invoke('list_directory', { path });
+}
+
+export function isTauri(): boolean {
+  return typeof window !== 'undefined' && '__TAURI__' in window;
+}