feat(medications): 重构药品通知系统并添加独立设置页面

- 创建药品通知服务模块，统一管理药品提醒通知的调度和取消
- 新增独立的通知设置页面，支持总开关和药品提醒开关分离控制
- 重构药品详情页面，移除频率编辑功能到独立页面
- 优化药品添加流程，支持拍照和相册选择图片
- 改进通知权限检查和错误处理机制
- 更新用户偏好设置，添加药品提醒开关配置

services/notifications.ts

@@ -204,6 +204,11 @@ export class NotificationService {
       console.log('用户点击了锻炼完成通知', data);
       // 跳转到锻炼历史页面
       router.push('/workout/history' 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);
     }
   }
 
@@ -538,6 +543,7 @@ export const NotificationTypes = {
   WORKOUT_COMPLETION: 'workout_completion',
   FASTING_START: 'fasting_start',
   FASTING_END: 'fasting_end',
+  MEDICATION_REMINDER: 'medication_reminder',
 } as const;
 
 // 便捷方法
@@ -574,3 +580,22 @@ export const sendMoodCheckinReminder = (title: string, body: string, date?: Date
     return notificationService.sendImmediateNotification(notification);
   }
 };
+
+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);
+  }
+};