feat: 后端架构重构 — Endpoint→Service→Repository分层 + AI确认机制 + 异步任务持久化

- 核心业务拆分为 Endpoint → Application Service → Repository 三层
- AI写入操作必须用户确认后才写库(确认卡片机制)
- 报告/饮食/用药分析改为持久化任务队列(原子领取/重试/重启恢复)
- 运动计划修复: 连续真实日期替代周模板
- 用药提醒去重 + 通知Outbox预留
- 认证收拢到AuthService, 管理员收拢到AdminService
- AI会话加用户归属校验防串号
- 提示词调整为患者视角
- 开发假数据已关闭
- 21/21测试通过, 0警告0错误

health_app/lib/pages/medication/medication_edit_page.dart

@@ -64,8 +64,9 @@ class _MedicationEditPageState extends ConsumerState<MedicationEditPage> {
         ];
     _timesPerDay = tod.length;
     _times = tod;
-    if (m['startDate'] != null)
+    if (m['startDate'] != null) {
       _start = DateTime.tryParse(m['startDate'].toString()) ?? DateTime.now();
+    }
     if (m['endDate'] != null) _end = DateTime.tryParse(m['endDate'].toString());
     setState(() {});
   }
@@ -110,13 +111,14 @@ class _MedicationEditPageState extends ConsumerState<MedicationEditPage> {
         popRoute(ref);
       }
     } catch (_) {
-      if (mounted)
+      if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
           const SnackBar(
             content: Text('保存失败'),
             backgroundColor: AppTheme.error,
           ),
         );
+      }
     }
     if (mounted) setState(() => _loading = false);
   }
@@ -124,9 +126,12 @@ class _MedicationEditPageState extends ConsumerState<MedicationEditPage> {
   void _updateTimes(int n) {
     setState(() {
       _timesPerDay = n;
-      while (_times.length < n)
+      while (_times.length < n) {
         _times.add(const TimeOfDay(hour: 12, minute: 0));
-      while (_times.length > n) _times.removeLast();
+      }
+      while (_times.length > n) {
+        _times.removeLast();
+      }
     });
   }