Refactor screens to MVC architecture with modular widgets

- Extract business logic from screens into dedicated controllers
- Split large screen files into smaller, reusable widget components
- Add controllers for AddSubscriptionScreen and DetailScreen
- Create modular widgets for subscription and detail features
- Improve code organization and maintainability
- Remove duplicated code and improve reusability

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/screens/sms_scan_screen.dart

@@ -7,11 +7,8 @@ import '../models/subscription.dart';
 import '../models/subscription_model.dart';
 import '../services/subscription_url_matcher.dart';
 import 'package:intl/intl.dart'; // NumberFormat을 사용하기 위한 import 추가
-import '../widgets/glassmorphic_scaffold.dart';
-import '../widgets/glassmorphic_app_bar.dart';
 import '../widgets/glassmorphism_card.dart';
 import '../widgets/themed_text.dart';
-import '../theme/app_colors.dart';
 
 class SmsScanScreen extends StatefulWidget {
   const SmsScanScreen({super.key});