feat(health): 线下活动管理端 CRUD + 积分统计 API + 前端页面 (Chunk 4)

后端:
- 线下活动管理: create/update/delete/list/checkin 5 个管理端接口
- 活动签到自动发放积分 (事务内原子操作)
- 积分统计 API: 总发放/总消耗/总过期/活跃账户/Top10排行

前端:
- OfflineEventList: 活动管理页面 (创建/编辑/删除/状态筛选)
- points.ts 扩展: 线下活动 + 统计 API 方法
- 侧边栏新增线下活动入口

apps/web/src/api/health/points.ts

@@ -75,6 +75,49 @@ export interface VerifyOrderReq {
   qr_code: string;
 }
 
+export interface OfflineEvent {
+  id: string;
+  title: string;
+  description: string | null;
+  event_date: string;
+  start_time: string | null;
+  end_time: string | null;
+  location: string | null;
+  points_reward: number;
+  max_participants: number;
+  current_participants: number;
+  status: string; // draft / published / ongoing / completed / cancelled
+  image_url: string | null;
+  created_at: string;
+  updated_at: string;
+  version: number;
+}
+
+export interface CreateOfflineEventReq {
+  title: string;
+  description?: string;
+  event_date: string;
+  start_time?: string;
+  end_time?: string;
+  location?: string;
+  points_reward?: number;
+  max_participants?: number;
+  status?: string;
+  image_url?: string;
+}
+
+export interface PointsStatistics {
+  total_issued: number;
+  total_spent: number;
+  total_expired: number;
+  active_accounts: number;
+  top_earners: Array<{
+    account_id: string;
+    patient_id: string;
+    total_earned: number;
+  }>;
+}
+
 // --- API ---
 
 export const pointsApi = {
@@ -128,4 +171,44 @@ export const pointsApi = {
     }>('/health/points/verify', req);
     return data.data;
   },
+
+  // Offline Events
+  listOfflineEvents: async (params?: Record<string, unknown>) => {
+    const { data } = await client.get<{
+      success: boolean;
+      data: PaginatedResponse<OfflineEvent>;
+    }>('/health/admin/offline-events', { params });
+    return data.data;
+  },
+
+  createOfflineEvent: async (req: CreateOfflineEventReq) => {
+    const { data } = await client.post<{
+      success: boolean;
+      data: OfflineEvent;
+    }>('/health/admin/offline-events', req);
+    return data.data;
+  },
+
+  updateOfflineEvent: async (id: string, req: Partial<CreateOfflineEventReq> & { version: number }) => {
+    const { data } = await client.put<{
+      success: boolean;
+      data: OfflineEvent;
+    }>(`/health/admin/offline-events/${id}`, req);
+    return data.data;
+  },
+
+  deleteOfflineEvent: async (id: string, version: number) => {
+    await client.delete(`/health/admin/offline-events/${id}`, {
+      data: { version },
+    });
+  },
+
+  // Points Statistics
+  getStatistics: async () => {
+    const { data } = await client.get<{
+      success: boolean;
+      data: PointsStatistics;
+    }>('/health/admin/points/statistics');
+    return data.data;
+  },
 };