Major UI/UX and architecture improvements

- Implemented new navigation system with NavigationProvider and route management
- Added adaptive theme system with ThemeProvider for better theme handling
- Introduced glassmorphism design elements (app bars, scaffolds, cards)
- Added advanced animations (spring animations, page transitions, staggered lists)
- Implemented performance optimizations (memory manager, lazy loading)
- Refactored Analysis screen into modular components
- Added floating navigation bar with haptic feedback
- Improved subscription cards with swipe actions
- Enhanced skeleton loading with better animations
- Added cached network image support
- Improved overall app architecture and code organization

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

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

lib/services/currency_util.dart

@@ -131,4 +131,29 @@ class CurrencyUtil {
       ).format(savings);
     }
   }
+
+  /// 금액과 통화를 받아 포맷팅하여 반환
+  static Future<String> formatAmount(double amount, String currency) async {
+    if (currency == 'USD') {
+      // USD 표시 + 원화 환산 금액
+      final usdFormatted = NumberFormat.currency(
+        locale: 'en_US',
+        symbol: '\$',
+        decimalDigits: 2,
+      ).format(amount);
+
+      // 원화 환산 금액
+      final krwAmount = await _exchangeRateService
+          .getFormattedKrwAmount(amount);
+
+      return '$usdFormatted $krwAmount';
+    } else {
+      // 원화 표시
+      return NumberFormat.currency(
+        locale: 'ko_KR',
+        symbol: '₩',
+        decimalDigits: 0,
+      ).format(amount);
+    }
+  }
 }