fix(calendar): 추천 기록 삭제 확인 팝업 및 SafeArea 적용

- recommendation_record_card: 삭제 전 확인 팝업 추가
- calendar_screen: 상세보기 BottomSheet에 SafeArea 적용
- 안드로이드 네비게이션 바에 버튼이 가려지는 문제 해결

lib/presentation/pages/calendar/calendar_screen.dart

@@ -586,9 +586,11 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen>
                 final recoTime = recommendationRecord?.recommendationDate;
                 final isVisitConfirmed = visitRecord?.isConfirmed == true;
 
-                return Padding(
-                  padding: const EdgeInsets.fromLTRB(16, 12, 16, 20),
-                  child: Column(
+                return SafeArea(
+                  top: false,
+                  child: Padding(
+                    padding: const EdgeInsets.fromLTRB(16, 12, 16, 20),
+                    child: Column(
                     mainAxisSize: MainAxisSize.min,
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: [
@@ -689,7 +691,8 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen>
                             label: const Text('추천 방문 기록으로 저장'),
                           ),
                         ),
-                    ],
+                      ],
+                    ),
                   ),
                 );
               },

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

@@ -27,6 +27,33 @@ class RecommendationRecordCard extends ConsumerWidget {
     return '$hour:$minute';
   }
 
+  Future<void> _showDeleteConfirmation(BuildContext context) async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('추천 기록 삭제'),
+        content: const Text('이 추천 기록을 삭제하시겠습니까?'),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(context).pop(false),
+            child: const Text('취소'),
+          ),
+          TextButton(
+            onPressed: () => Navigator.of(context).pop(true),
+            style: TextButton.styleFrom(
+              foregroundColor: AppColors.lightError,
+            ),
+            child: const Text('삭제'),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed == true) {
+      onDelete();
+    }
+  }
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final isDark = Theme.of(context).brightness == Brightness.dark;
@@ -166,7 +193,7 @@ class RecommendationRecordCard extends ConsumerWidget {
                   Align(
                     alignment: Alignment.centerRight,
                     child: TextButton(
-                      onPressed: onDelete,
+                      onPressed: () => _showDeleteConfirmation(context),
                       style: TextButton.styleFrom(
                         foregroundColor: Colors.redAccent,
                         padding: const EdgeInsets.only(top: 6),