diff --git a/frontend/index.html b/frontend/index.html
index 95e2a1f..95b416f 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -7,6 +7,8 @@
     <title>frontend</title>
     <!-- 飞书扫码登录 SDK（飞书外扫码登录用） -->
     <script src="https://lf-package-cn.feishucdn.com/obj/feishu-static/lark/passport/qrcode/LarkSSOSDKWebQRCode-1.0.3.js"></script>
+    <!-- 飞书 H5 JSBridge SDK（飞书内 WebView 免登用） -->
+    <script src="https://lf1-cdn-tos.bytegoofy.com/goofy/lark/op/h5-jsbridge-1.0.3.js"></script>
   </head>
   <body>
     <div id="root"></div>
diff --git a/frontend/src/pages/approval/detail.tsx b/frontend/src/pages/approval/detail.tsx
index 04c6c7e..1fd4052 100644
--- a/frontend/src/pages/approval/detail.tsx
+++ b/frontend/src/pages/approval/detail.tsx
@@ -126,41 +126,75 @@ export default function ApprovalDetail() {
       console.log('🔍 tryFeishuLogin 开始')
       console.log('📱 isInFeishu:', isInFeishu)
       console.log('🔧 window.tt:', window.tt)
+      console.log('🔧 window.h5sdk:', (window as any).h5sdk)
+      console.log('🔧 window.bridge:', (window as any).bridge)
 
-      if (!isInFeishu || !window.tt) {
-        console.log('❌ 不在飞书内或 tt 对象不可用，跳过免登')
+      if (!isInFeishu) {
+        console.log('❌ 不在飞书内，跳过免登')
         resolve(false)
         return
       }
 
-      console.log('🚀 开始调用 tt.requestAuthCode')
       const appId = 'cli_a8033d607cba500d'
-
-      window.tt.requestAuthCode({
-        appId: appId,
-        success: async (res: any) => {
-          console.log('✅ tt.requestAuthCode 成功:', res)
-          console.log('🔑 authCode:', res.code?.substring(0, 30) + '...')
-          try {
-            console.log('📡 调用后端登录API...')
-            const result = await authApi.feishuLogin(res.code)
-            console.log('✅ 后端登录成功:', result.user?.name)
-            login(result.user, result.token)
-            Toast.show('登录成功')
-            resolve(true)
-          } catch (error) {
-            console.error('❌ 飞书登录API失败:', error)
-            Toast.show('登录失败: ' + (error.message || '未知错误'))
+      const requestAuthCode = (apiObj: any, source: string) => {
+        console.log(`🚀 使用 ${source} 调用 requestAuthCode`)
+        apiObj.requestAuthCode({
+          appId: appId,
+          success: async (res: any) => {
+            console.log(`✅ ${source}.requestAuthCode 成功:`, res)
+            console.log('🔑 authCode:', res.code?.substring(0, 30) + '...')
+            try {
+              console.log('📡 调用后端登录API...')
+              const result = await authApi.feishuLogin(res.code)
+              console.log('✅ 后端登录成功:', result.user?.name)
+              login(result.user, result.token)
+              Toast.show('登录成功')
+              resolve(true)
+            } catch (error) {
+              console.error('❌ 飞书登录API失败:', error)
+              Toast.show('登录失败: ' + (error.message || '未知错误'))
+              resolve(false)
+            }
+          },
+          fail: (error: any) => {
+            console.error(`❌ ${source}.requestAuthCode 失败:`, error)
+            console.error('❌ 错误详情:', JSON.stringify(error))
+            Toast.show('免登失败: ' + (error.errorMessage || error.errMsg || '未知错误'))
             resolve(false)
-          }
-        },
-        fail: (error: any) => {
-          console.error('❌ tt.requestAuthCode 失败:', error)
-          console.error('❌ 错误详情:', JSON.stringify(error))
-          Toast.show('免登失败: ' + (error.errorMessage || error.errMsg || '未知错误'))
-          resolve(false)
-        },
-      })
+          },
+        })
+      }
+
+      // 优先使用 tt 对象
+      if (window.tt && typeof window.tt.requestAuthCode === 'function') {
+        requestAuthCode(window.tt, 'tt')
+        return
+      }
+
+      // 尝试使用 h5sdk
+      const h5sdk = (window as any).h5sdk
+      if (h5sdk && typeof h5sdk.requestAuthCode === 'function') {
+        requestAuthCode(h5sdk, 'h5sdk')
+        return
+      }
+
+      // 尝试使用 bridge
+      const bridge = (window as any).bridge
+      if (bridge && typeof bridge.requestAuthCode === 'function') {
+        requestAuthCode(bridge, 'bridge')
+        return
+      }
+
+      // 尝试使用 ttjsBridge
+      if (window.ttjsBridge && typeof window.ttjsBridge.requestAuthCode === 'function') {
+        requestAuthCode(window.ttjsBridge, 'ttjsBridge')
+        return
+      }
+
+      // 所有方法都不可用
+      console.log('❌ 所有飞书 API 都不可用')
+      Toast.show('飞书API不可用，请使用其他方式登录')
+      resolve(false)
     })
   }
 
diff --git a/frontend/src/pages/debug-feishu.tsx b/frontend/src/pages/debug-feishu.tsx
index eeab2a3..1083a5a 100644
--- a/frontend/src/pages/debug-feishu.tsx
+++ b/frontend/src/pages/debug-feishu.tsx
@@ -26,47 +26,112 @@ export default function DebugFeishuPage() {
   const [envInfo, setEnvInfo] = useState<EnvInfo | null>(null)
 
   useEffect(() => {
-    const ua = navigator.userAgent
-    const isInFeishu = ua.includes('Lark') || ua.includes('feishu') || ua.includes('lark')
+    // 延迟检测，等待 JSBridge 注入
+    setTimeout(() => {
+      const ua = navigator.userAgent
+      const isInFeishu = ua.includes('Lark') || ua.includes('feishu') || ua.includes('lark')
 
-    const ttMethods = window.tt ? Object.keys(window.tt) : []
+      const ttMethods = window.tt ? Object.keys(window.tt) : []
 
-    setEnvInfo({
-      ua,
-      isInFeishu,
-      hasTT: !!window.tt,
-      hasTTJSBridge: !!window.ttjsBridge,
-      hasH5SDK: !!(window as any).h5sdk,
-      hasBridge: !!(window as any).bridge,
-      ttMethods,
-    })
+      setEnvInfo({
+        ua,
+        isInFeishu,
+        hasTT: !!window.tt,
+        hasTTJSBridge: !!window.ttjsBridge,
+        hasH5SDK: !!(window as any).h5sdk,
+        hasBridge: !!(window as any).bridge,
+        ttMethods,
+      })
 
-    console.log('=== 飞书环境调试 ===')
-    console.log('User Agent:', ua)
-    console.log('在飞书中:', isInFeishu)
-    console.log('window.tt:', window.tt)
-    console.log('tt 对象方法:', ttMethods)
+      console.log('=== 飞书环境调试 ===')
+      console.log('User Agent:', ua)
+      console.log('在飞书中:', isInFeishu)
+      console.log('window.tt:', window.tt)
+      console.log('window.h5sdk:', (window as any).h5sdk)
+      console.log('window.bridge:', (window as any).bridge)
+      console.log('window.ttjsBridge:', window.ttjsBridge)
+      console.log('tt 对象方法:', ttMethods)
+
+      // 检查所有全局对象
+      console.log('所有全局对象:', Object.keys(window).filter(k => k.includes('tt') || k.includes('h5') || k.includes('bridge') || k.includes('lark') || k.includes('feishu')))
+    }, 500)
   }, [])
 
   const testFeishuLogin = async () => {
-    if (!window.tt) {
-      alert('tt 对象不存在，无法测试')
+    const appId = 'cli_a8033d607cba500d'
+
+    // 优先使用 tt 对象
+    if (window.tt && typeof window.tt.requestAuthCode === 'function') {
+      console.log('🔧 使用 tt.requestAuthCode')
+      window.tt.requestAuthCode({
+        appId: appId,
+        success: (res: any) => {
+          alert('✅ 获取授权码成功: ' + res.code?.substring(0, 30))
+          console.log('授权码:', res)
+        },
+        fail: (error: any) => {
+          alert('❌ 获取授权码失败: ' + JSON.stringify(error))
+          console.error('错误:', error)
+        },
+      })
       return
     }
 
-    const appId = 'cli_a8033d607cba500d'
+    // 尝试使用 h5sdk
+    const h5sdk = (window as any).h5sdk
+    if (h5sdk) {
+      console.log('🔧 尝试使用 h5sdk')
+      try {
+        if (typeof h5sdk.requestAuthCode === 'function') {
+          h5sdk.requestAuthCode({
+            appId: appId,
+            success: (res: any) => {
+              alert('✅ h5sdk 获取授权码成功: ' + res.code?.substring(0, 30))
+              console.log('授权码:', res)
+            },
+            fail: (error: any) => {
+              alert('❌ h5sdk 获取授权码失败: ' + JSON.stringify(error))
+              console.error('错误:', error)
+            },
+          })
+          return
+        }
+      } catch (e) {
+        console.error('h5sdk 调用失败:', e)
+      }
+    }
 
-    window.tt.requestAuthCode({
-      appId: appId,
-      success: (res: any) => {
-        alert('✅ 获取授权码成功: ' + res.code?.substring(0, 30))
-        console.log('授权码:', res)
-      },
-      fail: (error: any) => {
-        alert('❌ 获取授权码失败: ' + JSON.stringify(error))
-        console.error('错误:', error)
-      },
-    })
+    // 尝试使用 bridge
+    const bridge = (window as any).bridge
+    if (bridge) {
+      console.log('🔧 尝试使用 bridge')
+      try {
+        if (typeof bridge.requestAuthCode === 'function') {
+          bridge.requestAuthCode({
+            appId: appId,
+            success: (res: any) => {
+              alert('✅ bridge 获取授权码成功: ' + res.code?.substring(0, 30))
+              console.log('授权码:', res)
+            },
+            fail: (error: any) => {
+              alert('❌ bridge 获取授权码失败: ' + JSON.stringify(error))
+              console.error('错误:', error)
+            },
+          })
+          return
+        }
+      } catch (e) {
+        console.error('bridge 调用失败:', e)
+      }
+    }
+
+    // 如果都没有，显示详细错误
+    alert('❌ 未找到可用的飞书 API\n\n' +
+      'window.tt: ' + !!window.tt + '\n' +
+      'window.h5sdk: ' + !!(window as any).h5sdk + '\n' +
+      'window.bridge: ' + !!(window as any).bridge + '\n' +
+      'window.ttjsBridge: ' + !!window.ttjsBridge
+    )
   }
 
   return (