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/shared/presentation/pages/not_found_page.dart

@@ -1,41 +1,39 @@
 import 'package:flutter/material.dart';
 import '../../../../core/theme/app_colors.dart';
+import '../../../../l10n/app_localizations.dart';
 
 class NotFoundPage extends StatelessWidget {
   const NotFoundPage({super.key});
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     return Scaffold(
       backgroundColor: AppColors.background,
       appBar: AppBar(
-        title: const Text('Page Not Found'),
+        title: Text(l10n.pageNotFound),
         backgroundColor: AppColors.surface,
         foregroundColor: AppColors.textPrimary,
         elevation: 0,
       ),
-      body: const Center(
+      body: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Icon(
-              Icons.error_outline,
-              size: 64,
-              color: AppColors.error,
-            ),
-            SizedBox(height: 16),
+            const Icon(Icons.error_outline, size: 64, color: AppColors.error),
+            const SizedBox(height: 16),
             Text(
-              'Page Not Found',
-              style: TextStyle(
+              l10n.pageNotFound,
+              style: const TextStyle(
                 fontSize: 24,
                 fontWeight: FontWeight.bold,
                 color: AppColors.textPrimary,
               ),
             ),
-            SizedBox(height: 8),
+            const SizedBox(height: 8),
             Text(
-              'The page you are looking for does not exist.',
-              style: TextStyle(
+              'A página que procura não existe.',
+              style: const TextStyle(
                 fontSize: 16,
                 color: AppColors.textSecondary,
               ),