fix: 使用官方 tt.requestAuthCode API 替代 ttjsBridge

- 添加 tt 对象类型声明（官方 H5 API）
- 优先使用 tt.requestAuthCode() 获取授权码
- 保留 ttjsBridge 作为降级兼容方案
- 修正环境检测逻辑

参考文档: https://open.feishu.cn/document/quickly-create-a-login-free-web-app/introduction

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

frontend/src/pages/login/index.tsx

@@ -5,9 +5,18 @@ import { useUserStore } from '@/stores/user'
 import QRCodeLogin from './QRCodeLogin'
 import styles from './login.module.css'
 
-// 声明 ttjsBridge 类型
+// 声明飞书 JSAPI 类型
 declare global {
   interface Window {
+    // 官方 tt API（H5 应用免登）
+    tt?: {
+      requestAuthCode: (params: {
+        appId: string
+        success?: (res: { code: string }) => void
+        fail?: (err: any) => void
+      }) => void
+    }
+    // 旧版 ttjsBridge（兼容性）
     ttjsBridge?: {
       getAuthCode: (params: any) => void
     }
@@ -39,9 +48,9 @@ export default function Login() {
   useEffect(() => {
     // 1. 检测是否在飞书客户端内
     const ua = navigator.userAgent.toLowerCase()
-    const isInFeishu = ua.includes('feishu') || ua.includes('lark') || (window as any).ttjsBridge !== undefined
+    const isInFeishu = ua.includes('feishu') || ua.includes('lark') || window.tt !== undefined
 
-    console.log('🔍 Environment check:', { ua, isInFeishu, hasBridge: !!(window as any).ttjsBridge })
+    console.log('🔍 Environment check:', { ua, isInFeishu, hasTt: window.tt !== undefined })
 
     if (isInFeishu) {
       // 飞书内：静默授权
@@ -68,12 +77,30 @@ export default function Login() {
     }
   }, [])
 
-  // 飞书内静默授权
+  // 飞书内静默授权（使用官方 tt.requestAuthCode API）
   const handleFeishuAutoLogin = () => {
     console.log('🚀 Feishu auto login started')
 
-    if ((window as any).ttjsBridge) {
-      (window as any).ttjsBridge.getAuthCode({
+    const appId = 'cli_a8033d607cba500d'
+
+    if (window.tt) {
+      // 使用官方 tt.requestAuthCode API
+      window.tt.requestAuthCode({
+        appId: appId,
+        success: (res) => {
+          console.log('✅ Got auth code from tt.requestAuthCode:', res.code)
+          handleFeishuLogin(res.code)
+        },
+        fail: (error: any) => {
+          console.error('❌ requestAuthCode failed:', error)
+          setLoading(false)
+          Toast.show('获取授权失败，请重试')
+        },
+      })
+    } else if ((window as any).ttjsBridge) {
+      // 兼容旧版 ttjsBridge
+      console.warn('⚠️ Using legacy ttjsBridge API')
+      ;(window as any).ttjsBridge.getAuthCode({
         success: (authCode: string) => {
           console.log('✅ Got auth code from ttjsBridge:', authCode)
           handleFeishuLogin(authCode)
@@ -85,8 +112,9 @@ export default function Login() {
         },
       })
     } else {
-      console.warn('⚠️ ttjsBridge not available')
+      console.warn('⚠️ No Feishu bridge available')
       setLoading(false)
+      Toast.show('请在飞书中打开')
     }
   }