Settings, correção de light/darkmode do dispositivo (e adição da escolha entre modos nas settings) e correção do tipo de letra no textfield do chatbot

lib/features/dashboard/presentation/widgets/profile_section_widget.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_animate/flutter_animate.dart';
 import '../../../../core/services/auth_service.dart';
+import '../../../../core/routing/app_router.dart';
 
 /// Profile section with user info and achievements
 class ProfileSectionWidget extends StatelessWidget {
@@ -88,16 +89,21 @@ class ProfileSectionWidget extends StatelessWidget {
                       ],
                     ),
                   ),
-                  Container(
-                    padding: const EdgeInsets.all(8),
-                    decoration: BoxDecoration(
-                      color: const Color(0xFFF68D2D).withOpacity(0.1),
-                      borderRadius: BorderRadius.circular(8),
-                    ),
-                    child: const Icon(
-                      Icons.settings,
-                      color: Color(0xFFF68D2D),
-                      size: 20,
+                  GestureDetector(
+                    onTap: () {
+                      AppRouter.goToSettings(context);
+                    },
+                    child: Container(
+                      padding: const EdgeInsets.all(8),
+                      decoration: BoxDecoration(
+                        color: const Color(0xFFF68D2D).withOpacity(0.1),
+                        borderRadius: BorderRadius.circular(8),
+                      ),
+                      child: const Icon(
+                        Icons.settings,
+                        color: Color(0xFFF68D2D),
+                        size: 20,
+                      ),
                     ),
                   ),
                 ],