- Dark / light mode a funcionar no lado do aluno

- Atualização dos ficheiros markdown.

lib/shared/presentation/pages/loading_page.dart

@@ -1,25 +1,29 @@
 import 'package:flutter/material.dart';
-import '../../../../core/theme/app_colors.dart';
 
 class LoadingPage extends StatelessWidget {
   const LoadingPage({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return const Scaffold(
-      backgroundColor: AppColors.background,
+    return Scaffold(
+      backgroundColor: Theme.of(context).colorScheme.background,
       body: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
             CircularProgressIndicator(
               strokeWidth: 3,
-              valueColor: AlwaysStoppedAnimation<Color>(AppColors.primaryBlue),
+              valueColor: AlwaysStoppedAnimation<Color>(
+                Theme.of(context).colorScheme.primary,
+              ),
             ),
-            SizedBox(height: 24),
+            const SizedBox(height: 24),
             Text(
               'Loading...',
-              style: TextStyle(fontSize: 16, color: AppColors.textSecondary),
+              style: TextStyle(
+                fontSize: 16,
+                color: Theme.of(context).colorScheme.onSurfaceVariant,
+              ),
             ),
           ],
         ),