fix: 운동시간 더미 값 & 알약 더미 아이템 개수 수정 (#66)

* feat: 통증 부위 선택 화면 구현 완료

* fix: 운동 시간 더미값 수정

* fix: 알약 더미 아이템 개수 수정

Author: oxomi

frontend/ongi/lib/screens/health/exercise_record_screen.dart

@@ -21,7 +21,7 @@ class _ExerciseRecordScreenState extends State<ExerciseRecordScreen> {
   // Get exercise time for a specific date (placeholder: returns 0)
   Map<String, int> getExerciseTime(DateTime date) {
     // TODO: Replace with real backend call
-    return {'hours': 1, 'minutes': 50};
+    return {'hours': 1, 'minutes': 30};
   }
 
   // Convert page index to date for exercise PageView

frontend/ongi/lib/screens/health/pill_history_screen.dart

@@ -83,9 +83,9 @@ class _PillHistoryScreenState extends State<PillHistoryScreen> {
               bottom: 0,
               child: ListView.builder(
                 padding: EdgeInsets.all(10),
-                itemCount: 10,
+                itemCount: 3,
                 itemBuilder: (context, index) {
-                  if (index == 9) {
+                  if (index == 2) {
                     return GestureDetector(
                       onTap: () {
                         Navigator.push(