Melhoria no funcionamento do histórico, Os nomes no dashboard do aluno carregam a primeira vez e ficam salvos para n ficarem sempre a carregar quando se volta ao dashboard, removi o butão de novo chat na interface de introdução da IA, mudei a aparencia dessa introdução e do histórico

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

@@ -11,6 +11,14 @@ import '../widgets/profile_section_widget.dart';
 class StudentDashboardPage extends StatefulWidget {
   const StudentDashboardPage({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<StudentDashboardPage> createState() => _StudentDashboardPageState();
 }
@@ -21,7 +29,12 @@ class _StudentDashboardPageState extends State<StudentDashboardPage> {
   @override
   void initState() {
     super.initState();
-    _checkRoleAndLoadData();
+    // Use cached name if available, otherwise load data
+    if (StudentDashboardPage._cachedUserName != null) {
+      _userName = StudentDashboardPage._cachedUserName!;
+    } else {
+      _checkRoleAndLoadData();
+    }
   }
 
   Future<void> _checkRoleAndLoadData() async {
@@ -75,6 +88,7 @@ class _StudentDashboardPageState extends State<StudentDashboardPage> {
           print('DEBUG: Final displayName to use: "$displayName"');
           setState(() {
             _userName = displayName;
+            StudentDashboardPage._cachedUserName = displayName;
           });
         }
       }
@@ -99,14 +113,21 @@ class _StudentDashboardPageState extends State<StudentDashboardPage> {
           ),
         ),
         child: SafeArea(
+          top: false,
           child: SingleChildScrollView(
             child: Padding(
-              padding: const EdgeInsets.all(24.0),
+              padding: const EdgeInsets.only(
+                left: 24.0,
+                right: 24.0,
+                bottom: 28.0,
+                top: 52.0,
+              ),
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   // Header with logout and settings
                   Row(
+                    crossAxisAlignment: CrossAxisAlignment.center,
                     children: [
                       Expanded(
                         child: Column(