移除状态检测功能，专注核心切换功能

- 删除 checkProviderStatus 函数和相关 IPC 处理
- 移除 App.tsx 中所有状态检测相关的状态和函数
- 简化 ProviderList.tsx，去除状态显示和检查按钮
- 清理 types.ts 中的 ProviderStatus 类型定义
- 界面更简洁，专注于供应商切换这一核心功能

src/main/index.ts

@@ -2,7 +2,7 @@ import { app, BrowserWindow, ipcMain, dialog } from 'electron'
 import path from 'path'
 import Store from 'electron-store'
 import { Provider, AppConfig } from '../shared/types'
-import { checkProviderStatus, switchProvider, getClaudeCodeConfig } from './services'
+import { switchProvider, getClaudeCodeConfig } from './services'
 
 const store = new Store<AppConfig>()
 
@@ -79,10 +79,6 @@ ipcMain.handle('updateProvider', (_, provider: Provider) => {
   return true
 })
 
-ipcMain.handle('checkStatus', async (_, provider: Provider) => {
-  return await checkProviderStatus(provider)
-})
-
 ipcMain.handle('switchProvider', async (_, providerId: string) => {
   const providers = store.get('providers', {})
   const provider = providers[providerId]