- Dark / light mode a funcionar no lado do aluno

- Atualização dos ficheiros markdown.

lib/features/tutor/presentation/pages/tutor_chat_page.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import '../../../../core/theme/app_colors.dart';
 
 class TutorChatPage extends StatelessWidget {
   const TutorChatPage({super.key});
@@ -7,20 +6,34 @@ class TutorChatPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      backgroundColor: AppColors.background,
+      backgroundColor: Theme.of(context).colorScheme.background,
       appBar: AppBar(
         title: const Text('AI Tutor'),
-        backgroundColor: AppColors.surface,
-        foregroundColor: AppColors.textPrimary,
+        backgroundColor: Theme.of(context).colorScheme.surface,
+        foregroundColor: Theme.of(context).colorScheme.onSurface,
         elevation: 0,
       ),
-      body: const Center(
-        child: Text(
-          'AI Tutor Chat - Coming Soon',
-          style: TextStyle(
-            fontSize: 24,
-            fontWeight: FontWeight.bold,
-            color: AppColors.textPrimary,
+      body: Container(
+        decoration: BoxDecoration(
+          gradient: LinearGradient(
+            begin: Alignment.topLeft,
+            end: Alignment.bottomRight,
+            colors: [
+              Theme.of(context).colorScheme.background,
+              Theme.of(context).colorScheme.primary.withOpacity(0.1),
+              Theme.of(context).colorScheme.secondary.withOpacity(0.05),
+              Theme.of(context).colorScheme.background,
+            ],
+          ),
+        ),
+        child: Center(
+          child: Text(
+            'AI Tutor Chat - Coming Soon',
+            style: TextStyle(
+              fontSize: 24,
+              fontWeight: FontWeight.bold,
+              color: Theme.of(context).colorScheme.onSurface,
+            ),
           ),
         ),
       ),