fix(calendar): 월별 방문 카테고리 집계 반영

lib/presentation/pages/calendar/widgets/visit_statistics.dart

@@ -22,6 +22,12 @@ class VisitStatistics extends ConsumerWidget {
         month: selectedMonth.month,
       )),
     );
+    final monthlyCategoryStatsAsync = ref.watch(
+      monthlyCategoryVisitStatsProvider((
+        year: selectedMonth.year,
+        month: selectedMonth.month,
+      )),
+    );
 
     // 자주 방문한 맛집
     final frequentRestaurantsAsync = ref.watch(frequentRestaurantsProvider);
@@ -34,7 +40,11 @@ class VisitStatistics extends ConsumerWidget {
       child: Column(
         children: [
           // 이번 달 통계
-          _buildMonthlyStats(monthlyStatsAsync, isDark),
+          _buildMonthlyStats(
+            monthlyStatsAsync,
+            monthlyCategoryStatsAsync,
+            isDark,
+          ),
           const SizedBox(height: 16),
 
           const NativeAdPlaceholder(height: 360),
@@ -53,6 +63,7 @@ class VisitStatistics extends ConsumerWidget {
 
   Widget _buildMonthlyStats(
     AsyncValue<Map<String, int>> statsAsync,
+    AsyncValue<Map<String, int>> categoryStatsAsync,
     bool isDark,
   ) {
     return Card(
@@ -75,9 +86,17 @@ class VisitStatistics extends ConsumerWidget {
                   0,
                   (sum, count) => sum + count,
                 );
-                final categoryCounts =
-                    stats.entries.where((e) => !e.key.contains('/')).toList()
+                final categoryCounts = categoryStatsAsync.maybeWhen(
+                  data: (data) {
+                    final entries = data.entries.toList()
                       ..sort((a, b) => b.value.compareTo(a.value));
+                    return entries;
+                  },
+                  orElse: () => <MapEntry<String, int>>[],
+                );
+                final topCategory = categoryCounts.isNotEmpty
+                    ? categoryCounts.first
+                    : null;
 
                 return Column(
                   children: [
@@ -89,12 +108,21 @@ class VisitStatistics extends ConsumerWidget {
                       isDark: isDark,
                     ),
                     const SizedBox(height: 12),
-                    if (categoryCounts.isNotEmpty) ...[
+                    if (topCategory != null) ...[
                       _buildStatItem(
                         icon: Icons.favorite,
                         label: '가장 많이 간 카테고리',
-                        value:
-                            '${categoryCounts.first.key} (${categoryCounts.first.value}회)',
+                        value: '${topCategory.key} (${topCategory.value}회)',
+                        color: AppColors.lightSecondary,
+                        isDark: isDark,
+                      ),
+                    ] else ...[
+                      _buildStatItem(
+                        icon: Icons.favorite_border,
+                        label: '가장 많이 간 카테고리',
+                        value: categoryStatsAsync.isLoading
+                            ? '집계 중...'
+                            : '데이터 없음',
                         color: AppColors.lightSecondary,
                         isDark: isDark,
                       ),

lib/presentation/providers/visit_provider.dart

@@ -35,6 +35,34 @@ final monthlyVisitStatsProvider =
       return repository.getMonthlyVisitStats(params.year, params.month);
     });
 
+/// 월별 카테고리별 방문 통계 Provider
+final monthlyCategoryVisitStatsProvider =
+    FutureProvider.family<Map<String, int>, ({int year, int month})>((
+      ref,
+      params,
+    ) async {
+      final repository = ref.watch(visitRepositoryProvider);
+      final restaurants = await ref.watch(restaurantListProvider.future);
+
+      final records = await repository.getVisitRecordsByDateRange(
+        startDate: DateTime(params.year, params.month, 1),
+        endDate: DateTime(params.year, params.month + 1, 0),
+      );
+
+      final categoryCount = <String, int>{};
+      for (final record in records) {
+        final restaurant = restaurants
+            .where((r) => r.id == record.restaurantId)
+            .firstOrNull;
+        if (restaurant == null) continue;
+
+        categoryCount[restaurant.category] =
+            (categoryCount[restaurant.category] ?? 0) + 1;
+      }
+
+      return categoryCount;
+    });
+
 /// 방문 기록 관리 StateNotifier
 class VisitNotifier extends StateNotifier<AsyncValue<void>> {
   final VisitRepository _repository;