refactor(desktop): 从 Tauri 迁移到 Electrobun

- 移除 Tauri v2 代码 (src-tauri/, copy.ts)
- 添加 Electrobun 配置和入口 (electrobun.config.ts, src/bun/index.ts)
- 更新 package.json 使用 catalog 管理 electrobun 依赖
- 移除 server 中的 @tauri-apps/api 依赖
- 更新 AGENTS.md 文档

apps/server/package.json

@@ -27,7 +27,6 @@
     "@tanstack/react-router": "catalog:",
     "@tanstack/react-router-ssr-query": "catalog:",
     "@tanstack/react-start": "catalog:",
-    "@tauri-apps/api": "catalog:",
     "drizzle-orm": "catalog:",
     "drizzle-zod": "catalog:",
     "postgres": "catalog:",

apps/server/src/routes/index.tsx

@@ -1,9 +1,7 @@
 import { useMutation, useSuspenseQuery } from '@tanstack/react-query'
 import { createFileRoute } from '@tanstack/react-router'
-import { isTauri } from '@tauri-apps/api/core'
-import { getCurrentWindow } from '@tauri-apps/api/window'
 import type { ChangeEventHandler, FormEventHandler } from 'react'
-import { useEffect, useState } from 'react'
+import { useState } from 'react'
 import { orpc } from '@/client/query-client'
 
 export const Route = createFileRoute('/')({
@@ -21,11 +19,6 @@ function Todos() {
   const updateMutation = useMutation(orpc.todo.update.mutationOptions())
   const deleteMutation = useMutation(orpc.todo.remove.mutationOptions())
 
-  useEffect(() => {
-    if (!isTauri()) return
-    getCurrentWindow().setTitle('待办事项')
-  }, [])
-
   const handleCreateTodo: FormEventHandler<HTMLFormElement> = (e) => {
     e.preventDefault()
     if (newTodoTitle.trim()) {