连续点击屏幕左上角，弹出确认是否退出的对话框

lib/bloc/web_cubit.dart

@@ -502,6 +502,47 @@ class WebCubit extends Cubit<WebState> with WidgetsBindingObserver {
     router.go('/loginMain');
     router.go('/loginMain');
   }
   }
 
 
+  // 连续点击退出登录的次数阈值
+  static const int _quickLogoutTapCount = 5;
+  // 相邻两次点击的最大间隔（超过则计数重置）
+  static const Duration _quickLogoutResetWindow = Duration(seconds: 2);
+  int _quickLogoutTapCounter = 0;
+  Timer? _quickLogoutResetTimer;
+
+  ///
+  /// 屏幕热区点击事件入口：累计达到阈值后返回 true，由页面调起确认对话框
+  /// 用于 H5 因 JS 异常无响应时的兜底退出机制
+  ///
+  bool onQuickLogoutTap() {
+    debugPrint('onQuickLogoutTap--------------------------------->');
+    _quickLogoutResetTimer?.cancel();
+    _quickLogoutTapCounter += 1;
+
+    if (_quickLogoutTapCounter >= _quickLogoutTapCount) {
+      _quickLogoutTapCounter = 0;
+      return true;
+    }
+
+    _quickLogoutResetTimer = Timer(_quickLogoutResetWindow, () {
+      _quickLogoutTapCounter = 0;
+    });
+    return false;
+  }
+
+  /// 执行快速退出登录：清理认证信息与 WebView 缓存，跳转登录页
+  Future<void> handleQuickLogout() async {
+    final prefs = getIt.get<SharedPreferences>();
+    // 删除所有 auth_ 开头的 key
+    for (final key in prefs.getKeys()) {
+      if (key.startsWith('auth_')) {
+        await prefs.remove(key);
+      }
+    }
+    // 清理 WebView 缓存，避免下次进入仍是异常页面
+    await clearWebCache();
+    router.go('/loginMain');
+  }
+
   void goIm() {
   void goIm() {
     router.go('/im');
     router.go('/im');
   }
   }

lib/ui/pages/web_page.dart

@@ -83,6 +83,26 @@ class WebPage extends StatelessWidget {
                       ),
                       ),
                     ),
                     ),
                   ),
                   ),
+                // 连续点击退出登录的隐形热区（左上角 60x60）
+                // 用于 H5 因 JS 异常无响应时的兜底退出机制
+                // 使用 Listener 而非 GestureDetector：避免 Android 端 WebView 平台视图
+                // 在手势竞技场中抢占 onTap，导致点击不生效。
+                Positioned(
+                  left: 0,
+                  top: 0,
+                  width: 80,
+                  height: 80,
+                  child: Listener(
+                    behavior: HitTestBehavior.opaque,
+                    onPointerDown: (_) {
+                      final triggered = ctx.read<WebCubit>().onQuickLogoutTap();
+                      if (triggered) {
+                        _showQuickLogoutDialog(ctx);
+                      }
+                    },
+                    child: const SizedBox.expand(),
+                  ),
+                ),
               ],
               ],
             ),
             ),
             bottomNavigationBar: state.showBottomNavBar
             bottomNavigationBar: state.showBottomNavBar
@@ -192,4 +212,81 @@ class WebPage extends StatelessWidget {
       toolbarHeight: 40.0,
       toolbarHeight: 40.0,
     );
     );
   }
   }
+
+  /// 连续点击达阈后弹出的退出登录确认对话框
+  /// 样式参照 login_main_page_v3 中的 _showAgreementDialog
+  Future<void> _showQuickLogoutDialog(BuildContext ctx) async {
+    final webCubit = ctx.read<WebCubit>();
+    final result = await showDialog(
+      context: ctx,
+      barrierDismissible: false,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.all(
+              Radius.circular(5),
+            ),
+          ),
+          title: Text(
+            '退出登录',
+            style: TextStyle(
+              fontSize: 17,
+              color: Color(0xFF000000),
+            ),
+            textAlign: TextAlign.center,
+          ),
+          content: Text(
+            '检测到连续点击了屏幕，是否退出登录？',
+            style: TextStyle(color: Color(0xFF666666), fontSize: 14),
+          ),
+          actions: [
+            Table(
+              children: [
+                TableRow(
+                  children: [
+                    TableCell(
+                      child: TextButton(
+                        onPressed: () {
+                          Navigator.of(context).pop();
+                        },
+                        style: TextButton.styleFrom(
+                          foregroundColor: Color(0xFF666666),
+                          textStyle: TextStyle(fontSize: 17),
+                          padding: EdgeInsets.zero,
+                          shape: RoundedRectangleBorder(
+                            borderRadius: BorderRadius.zero,
+                          ),
+                        ),
+                        child: Text('取消'),
+                      ),
+                    ),
+                    TableCell(
+                      child: TextButton(
+                        onPressed: () {
+                          Navigator.of(context).pop('OK');
+                        },
+                        style: TextButton.styleFrom(
+                          foregroundColor: Color(0xFF7691FA),
+                          textStyle: TextStyle(fontSize: 17),
+                          minimumSize: Size.fromHeight(40),
+                          padding: EdgeInsets.zero,
+                          shape: RoundedRectangleBorder(
+                            borderRadius: BorderRadius.zero,
+                          ),
+                        ),
+                        child: Text('确认'),
+                      ),
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ],
+        );
+      },
+    );
+    if (result != null) {
+      webCubit.handleQuickLogout();
+    }
+  }
 }
 }