feat(miniprogram): TabBar 重构 + 积分商城页面 (Chunk 5)

TabBar: 首页|健康|预约|资讯|我的 → 首页|上报|咨询|商城|我的

新增页面:
- 商城(mall): 积分余额卡片 + 签到 + 商品网格(分类型筛选/分页)
- 咨询(consultation): 占位页(即将上线)

新增服务:
- services/points.ts: 积分账户/签到/商品列表 API

API: getAccount, dailyCheckin, getCheckinStatus, listProducts

apps/miniprogram/src/services/points.ts

@@ -0,0 +1,57 @@
+import { api } from './request';
+
+export interface PointsAccount {
+  id: string;
+  patient_id: string;
+  balance: number;
+  total_earned: number;
+  total_spent: number;
+  total_expired: number;
+}
+
+export interface PointsProduct {
+  id: string;
+  name: string;
+  product_type: string; // physical / service / privilege
+  points_cost: number;
+  stock: number;
+  image_url: string | null;
+  description: string | null;
+  is_active: boolean;
+  sort_order: number;
+  version: number;
+}
+
+export interface CheckinStatus {
+  checked_in_today: boolean;
+  consecutive_days: number;
+  next_streak_milestone: number | null;
+}
+
+export interface ProductListResponse {
+  data: PointsProduct[];
+  total: number;
+  page: number;
+  page_size: number;
+  total_pages: number;
+}
+
+export async function getAccount() {
+  return api.get<PointsAccount>('/health/points/account');
+}
+
+export async function dailyCheckin() {
+  return api.post<CheckinStatus>('/health/points/checkin');
+}
+
+export async function getCheckinStatus() {
+  return api.get<CheckinStatus>('/health/points/checkin/status');
+}
+
+export async function listProducts(params?: {
+  page?: number;
+  page_size?: number;
+  product_type?: string;
+}) {
+  return api.get<ProductListResponse>('/health/points/products', params);
+}