feat(medications): 添加AI智能识别药品功能和有效期管理

- 新增AI药品识别流程，支持多角度拍摄和实时进度显示
- 添加药品有效期字段，支持在添加和编辑药品时设置有效期
- 新增MedicationAddOptionsSheet选择录入方式（AI识别/手动录入）
- 新增ai-camera和ai-progress两个独立页面处理AI识别流程
- 新增ExpiryDatePickerModal和MedicationPhotoGuideModal组件
- 移除本地通知系统，迁移到服务端推送通知
- 添加medicationNotificationCleanup服务清理旧的本地通知
- 更新药品详情页支持AI草稿模式和有效期显示
- 优化药品表单，支持有效期选择和AI识别结果确认
- 更新i18n资源，添加有效期相关翻译

BREAKING CHANGE: 药品通知系统从本地通知迁移到服务端推送，旧版本的本地通知将被清理

services/notifications.ts

@@ -238,11 +238,6 @@ export class NotificationService {
       console.log('用户点击了 HRV 压力通知', data);
       const targetUrl = (data?.url as string) || '/(tabs)/statistics';
       router.push(targetUrl as any);
-    } else if (data?.type === NotificationTypes.MEDICATION_REMINDER) {
-      // 处理药品提醒通知
-      console.log('用户点击了药品提醒通知', data);
-      // 跳转到药品页面
-      router.push('/(tabs)/medications' as any);
     }
   }
 
@@ -584,7 +579,6 @@ export const NotificationTypes = {
   WORKOUT_COMPLETION: 'workout_completion',
   FASTING_START: 'fasting_start',
   FASTING_END: 'fasting_end',
-  MEDICATION_REMINDER: 'medication_reminder',
   HRV_STRESS_ALERT: 'hrv_stress_alert',
 } as const;
 
@@ -623,21 +617,3 @@ export const sendMoodCheckinReminder = (title: string, body: string, date?: Date
   }
 };
 
-export const sendMedicationReminder = (title: string, body: string, medicationId?: string, date?: Date) => {
-  const notification: NotificationData = {
-    title,
-    body,
-    data: {
-      type: NotificationTypes.MEDICATION_REMINDER,
-      medicationId: medicationId || ''
-    },
-    sound: true,
-    priority: 'high',
-  };
-
-  if (date) {
-    return notificationService.scheduleNotificationAtDate(notification, date);
-  } else {
-    return notificationService.sendImmediateNotification(notification);
-  }
-};