quizzes e teacher dashboard, mudanças

lib/features/dashboard/presentation/pages/teacher_dashboard_page.dart

@@ -10,6 +10,14 @@ import '../widgets/teacher_classes_list_widget.dart';
 class TeacherDashboardPage extends StatefulWidget {
   const TeacherDashboardPage({super.key});
 
+  /// Clear the cached user name (call when name is updated in settings)
+  static void clearCachedUserName() {
+    _cachedUserName = null;
+  }
+
+  /// Cached user name to prevent flickering
+  static String? _cachedUserName;
+
   @override
   State<TeacherDashboardPage> createState() => _TeacherDashboardPageState();
 }
@@ -20,7 +28,12 @@ class _TeacherDashboardPageState extends State<TeacherDashboardPage> {
   @override
   void initState() {
     super.initState();
-    _checkRoleAndLoadData();
+    // Use cached name if available, otherwise load data
+    if (TeacherDashboardPage._cachedUserName != null) {
+      _userName = TeacherDashboardPage._cachedUserName!;
+    } else {
+      _checkRoleAndLoadData();
+    }
   }
 
   Future<void> _checkRoleAndLoadData() async {
@@ -70,6 +83,7 @@ class _TeacherDashboardPageState extends State<TeacherDashboardPage> {
           print('DEBUG: Final displayName to use: "$displayName"');
           setState(() {
             _userName = displayName;
+            TeacherDashboardPage._cachedUserName = displayName;
           });
         }
       }