优化路径规划和 退出登录逻辑

lib/features/my/presentation/web_view/user_info_pages.dart

@@ -23,12 +23,11 @@ class UserInfoCard extends StatefulWidget {
 class _UserInfoCardState extends State<UserInfoCard> {
   late TextEditingController _nicknameController;
   final GetIt _getIt = GetIt.I;
-  MyCubit? _myCubit; // 可空类型
+  MyCubit? _myCubit;
 
   @override
   void initState() {
     super.initState();
-    // 优先从 BlocProvider 获取，获取失败则从 GetIt 兜底
     try {
       _myCubit = BlocProvider.of<MyCubit>(context);
     } catch (e) {
@@ -48,9 +47,35 @@ class _UserInfoCardState extends State<UserInfoCard> {
     super.dispose();
   }
 
-  // 打开修改昵称的底部抽屉
+  // ✅ 登录失效提示弹窗 + 2秒后跳登录
+  void _showSessionExpiredDialog() {
+    showDialog(
+      context: context,
+      barrierDismissible: false,
+      builder: (context) => WillPopScope(
+        onWillPop: () async => false,
+        child: AlertDialog(
+          title: const Text('提示'),
+          content: const Text('登录状态失效，请重新登录！'),
+          actions: [
+            Center(
+              child: TextButton(onPressed: () {}, child: const Text('确定')),
+            ),
+          ],
+        ),
+      ),
+    );
+
+    // 2秒后关闭弹窗并跳登录
+    Future.delayed(const Duration(seconds: 2), () {
+      if (mounted) {
+        Navigator.pop(context); // 关闭弹窗
+        context.go(RoutePaths.login);
+      }
+    });
+  }
+
   void _openEditNicknameBottomSheet() {
-    // 修复1：先校验 _myCubit 是否为 null，避免空断言
     final myCubit = _myCubit;
     if (myCubit == null) {
       ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('Cubit 初始化失败，无法修改昵称'), backgroundColor: Colors.red));
@@ -64,13 +89,14 @@ class _UserInfoCardState extends State<UserInfoCard> {
       backgroundColor: Colors.transparent,
       constraints: BoxConstraints(maxHeight: MediaQuery.of(context).size.height * 0.8),
       builder: (context) => BlocProvider.value(
-        // 使用非空的局部变量，无需空断言
         value: myCubit,
         child: BlocBuilder<MyCubit, MyState>(
           builder: (context, myState) {
-            final cubit = context.read<MyCubit>();
+            // ==================== ✅ 核心修复 ====================
             if (myState.errorMessage == '登录状态失效，请重新登录') {
-              context.go(RoutePaths.login);
+              WidgetsBinding.instance.addPostFrameCallback((_) {
+                _showSessionExpiredDialog(); // 弹窗提示，不直接跳转
+              });
             }
 
             return Padding(
@@ -96,16 +122,12 @@ class _UserInfoCardState extends State<UserInfoCard> {
                       TextField(
                         controller: _nicknameController,
                         style: const TextStyle(fontSize: 16),
-                        decoration: InputDecoration(
-                          border: const OutlineInputBorder(),
-                          contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
-                        ),
+                        decoration: const InputDecoration(border: OutlineInputBorder(), contentPadding: EdgeInsets.symmetric(horizontal: 12, vertical: 10)),
                         autofocus: true,
                         enabled: !myState.isLoading,
                       ),
                       const SizedBox(height: 20),
 
-                      // 核心：根据 MyState 显示加载/按钮/错误提示
                       if (myState.isLoading)
                         const Center(
                           child: Column(
@@ -119,14 +141,11 @@ class _UserInfoCardState extends State<UserInfoCard> {
                       else
                         Column(
                           children: [
-                            // 修复2：使用 ?. 和 ?? 避免空断言，安全判断错误信息
                             if (myState.errorMessage?.isNotEmpty ?? false)
                               Padding(
                                 padding: const EdgeInsets.only(bottom: 12),
                                 child: Text(myState.errorMessage ?? "修改失败", style: const TextStyle(color: Colors.red, fontSize: 14)),
                               ),
-
-                            // 确定修改按钮
                             SizedBox(
                               width: double.infinity,
                               child: ElevatedButton(
@@ -152,7 +171,6 @@ class _UserInfoCardState extends State<UserInfoCard> {
     );
   }
 
-  // 提交新昵称的业务逻辑
   Future<void> _submitNewNickname(BuildContext context) async {
     final newNickname = _nicknameController.text.trim();
     if (newNickname.isEmpty) {
@@ -169,25 +187,19 @@ class _UserInfoCardState extends State<UserInfoCard> {
       return;
     }
 
-    // 移除重复的加载弹窗（由 BlocBuilder 显示加载状态）
     await myCubit.updateName(newNickname);
 
-    // 成功后由 BlocBuilder 监听状态并处理弹窗关闭和提示
-    if (context.mounted && myCubit.state.errorMessage!.isEmpty ?? true) {
+    if (context.mounted && (myCubit.state.errorMessage?.isEmpty ?? true)) {
       setState(() {
         _nicknameController.text = newNickname;
       });
       Navigator.pop(context);
-      // 触发 AuthCubit 重新获取用户信息
     }
   }
 
-  // 扫码绑定设备逻辑（保留）
-// 扫码绑定设备逻辑（修复版）
   Future<void> _handleScanAndBind(BuildContext context) async {
     bool isScanned = false;
 
-    // 1. 扫码逻辑 (保持不变)
     final String? deviceCode = await Navigator.push<String>(
       context,
       MaterialPageRoute(
@@ -196,10 +208,7 @@ class _UserInfoCardState extends State<UserInfoCard> {
           appBar: AppBar(
             title: const Text('扫码绑定设备'),
             backgroundColor: Colors.black54,
-            leading: IconButton(
-              icon: const Icon(Icons.close),
-              onPressed: () => Navigator.pop(context),
-            ),
+            leading: IconButton(icon: const Icon(Icons.close), onPressed: () => Navigator.pop(context)),
           ),
           body: MobileScanner(
             onDetect: (BarcodeCapture capture) {
@@ -226,7 +235,6 @@ class _UserInfoCardState extends State<UserInfoCard> {
       return;
     }
 
-    // 2. 确认对话框 (保持不变)
     final bool? confirmBind = await showDialog<bool>(
       context: context,
       barrierDismissible: false,
@@ -235,19 +243,10 @@ class _UserInfoCardState extends State<UserInfoCard> {
         content: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            const Text('设备信息：'),
-            const SizedBox(height: 8),
-            Text('设备编码：$deviceCode'),
-            const Text('设备状态：未绑定'),
-            const Text('设备类型：智能设备'),
-          ],
+          children: [const Text('设备信息：'), const SizedBox(height: 8), Text('设备编码：$deviceCode'), const Text('设备状态：未绑定'), const Text('设备类型：智能设备')],
         ),
         actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(context, false),
-            child: const Text('取消'),
-          ),
+          TextButton(onPressed: () => Navigator.pop(context, false), child: const Text('取消')),
           ElevatedButton(
             onPressed: () => Navigator.pop(context, true),
             child: const Text('确定绑定'),
@@ -261,13 +260,12 @@ class _UserInfoCardState extends State<UserInfoCard> {
       return;
     }
 
-    // 3. 显示加载框：保存加载弹窗的 BuildContext
-    BuildContext? loadingContext; // 新增：保存加载弹窗的上下文
+    BuildContext? loadingContext;
     showDialog(
       context: context,
       barrierDismissible: false,
       builder: (context) {
-        loadingContext = context; // 保存这个 context
+        loadingContext = context;
         return const Center(child: CircularProgressIndicator());
       },
     );
@@ -276,30 +274,22 @@ class _UserInfoCardState extends State<UserInfoCard> {
       final devicesCubit = GetIt.I<DevicesCubit>();
       await devicesCubit.bindDevice(deviceCode, '');
 
-      // ✅ 成功：用 loadingContext 关闭弹窗
       if (loadingContext != null && Navigator.canPop(loadingContext!)) {
         Navigator.pop(loadingContext!);
       }
 
       if (context.mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('设备绑定成功！'), backgroundColor: Colors.green),
-        );
+        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('设备绑定成功！'), backgroundColor: Colors.green));
       }
     } catch (e) {
-      // ❌ 失败：用 loadingContext 关闭弹窗
       if (loadingContext != null && Navigator.canPop(loadingContext!)) {
         Navigator.pop(loadingContext!);
       }
 
       if (context.mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text('绑定失败：${e.toString()}'),
-            backgroundColor: Colors.red,
-            duration: const Duration(seconds: 4),
-          ),
-        );
+        ScaffoldMessenger.of(
+          context,
+        ).showSnackBar(SnackBar(content: Text('绑定失败：${e.toString()}'), backgroundColor: Colors.red, duration: const Duration(seconds: 4)));
       }
       debugPrint('设备绑定失败详情：$e');
     }
@@ -314,7 +304,7 @@ class _UserInfoCardState extends State<UserInfoCard> {
           height: 48,
           decoration: BoxDecoration(
             borderRadius: BorderRadius.circular(8),
-            image: DecorationImage(image: NetworkImage('https://pic4.zhimg.com/v2-c34c61a90095abb8713de9d1dca7ec7b_r.jpg'), fit: BoxFit.cover),
+            image: const DecorationImage(image: NetworkImage('https://pic4.zhimg.com/v2-c34c61a90095abb8713de9d1dca7ec7b_r.jpg'), fit: BoxFit.cover),
           ),
         ),
         const SizedBox(width: 12),