feat: 添加飞书环境调试页面和详细日志

修改内容：
1. 新增 debug-feishu.tsx - 飞书环境调试页面
2. approval/detail.tsx - 添加详细的调试日志
3. router/index.tsx - 添加调试页面路由
4. business-trip.ts - 修复 import 错误

调试页面功能：
- 检测是否在飞书客户端内
- 显示 window.tt 等对象状态
- 测试飞书免登功能

使用方法：
1. 在飞书客户端中打开: https://xsm.dev.hnxinyouhe.com/debug-feishu
2. 查看环境信息
3. 点击"测试飞书免登"按钮

相关文件：
- frontend/src/pages/debug-feishu.tsx
- frontend/src/pages/approval/detail.tsx
- frontend/src/router/index.tsx
- frontend/src/services/business-trip.ts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/router/index.tsx

@@ -13,6 +13,7 @@ import ApprovalList from '@/pages/approval/list'
 import ApprovalDetail from '@/pages/approval/detail'
 import Login from '@/pages/login'
 import SimpleLogin from '@/pages/login-simple'
+import DebugFeishu from '@/pages/debug-feishu'
 
 const router = createBrowserRouter([
   {
@@ -35,6 +36,7 @@ const router = createBrowserRouter([
   },
   { path: '/login', element: <Login /> },
   { path: '/login-simple', element: <SimpleLogin /> },
+  { path: '/debug-feishu', element: <DebugFeishu /> },
   { path: '*', element: <Navigate to='/login' replace /> },
 ])