feat: add payment card grouping and analysis

lib/widgets/subscription_list_widget.dart

@@ -1,66 +1,52 @@
 import 'package:flutter/material.dart';
 import '../models/subscription_model.dart';
-import '../widgets/category_header_widget.dart';
+import '../widgets/subscription_group_header.dart';
 import '../widgets/swipeable_subscription_card.dart';
 import '../widgets/staggered_list_animation.dart';
 import '../widgets/app_navigator.dart';
 import 'package:provider/provider.dart';
 import '../providers/subscription_provider.dart';
 import '../providers/locale_provider.dart';
-import '../providers/category_provider.dart';
 import '../services/subscription_url_matcher.dart';
 import './dialogs/delete_confirmation_dialog.dart';
 import './common/snackbar/app_snackbar.dart';
 import '../l10n/app_localizations.dart';
 import '../utils/logger.dart';
+import '../utils/subscription_grouping_helper.dart';
 
 /// 카테고리별로 구독 목록을 표시하는 위젯
 class SubscriptionListWidget extends StatelessWidget {
-  final Map<String, List<SubscriptionModel>> categorizedSubscriptions;
+  final List<SubscriptionGroupData> groups;
   final AnimationController fadeController;
 
   const SubscriptionListWidget({
     super.key,
-    required this.categorizedSubscriptions,
+    required this.groups,
     required this.fadeController,
   });
 
   @override
   Widget build(BuildContext context) {
-    // 카테고리 키 목록 (정렬된)
-    final categories = categorizedSubscriptions.keys.toList();
+    final sections = groups;
 
     return SliverList(
       delegate: SliverChildBuilderDelegate(
         (context, index) {
-          final category = categories[index];
-          final subscriptions = categorizedSubscriptions[category]!;
+          final group = sections[index];
+          final subscriptions = group.subscriptions;
 
           return Padding(
             padding: const EdgeInsets.only(bottom: 8.0),
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                // 카테고리 헤더
-                Padding(
-                  padding: const EdgeInsets.fromLTRB(20, 16, 20, 8),
-                  child: Consumer<CategoryProvider>(
-                    builder: (context, categoryProvider, child) {
-                      return CategoryHeaderWidget(
-                        categoryName: categoryProvider.getLocalizedCategoryName(
-                            context, category),
-                        subscriptionCount: subscriptions.length,
-                        totalCostUSD:
-                            _calculateTotalByCurrency(subscriptions, 'USD'),
-                        totalCostKRW:
-                            _calculateTotalByCurrency(subscriptions, 'KRW'),
-                        totalCostJPY:
-                            _calculateTotalByCurrency(subscriptions, 'JPY'),
-                        totalCostCNY:
-                            _calculateTotalByCurrency(subscriptions, 'CNY'),
-                      );
-                    },
-                  ),
+                SubscriptionGroupHeader(
+                  group: group,
+                  subscriptionCount: subscriptions.length,
+                  totalCostUSD: _calculateTotalByCurrency(subscriptions, 'USD'),
+                  totalCostKRW: _calculateTotalByCurrency(subscriptions, 'KRW'),
+                  totalCostJPY: _calculateTotalByCurrency(subscriptions, 'JPY'),
+                  totalCostCNY: _calculateTotalByCurrency(subscriptions, 'CNY'),
                 ),
                 // 카테고리별 구독 목록
                 FadeTransition(
@@ -169,7 +155,7 @@ class SubscriptionListWidget extends StatelessWidget {
             ),
           );
         },
-        childCount: categories.length,
+        childCount: sections.length,
       ),
     );
   }