feat(mp): design-handoff 产出的页面样式和组件优化

- 首页/商城/医生端/积分/家庭档案等页面 SCSS + TSX 更新
- TabFilter 组件样式优化
- points service 接口调整
- app.config 路由注册更新

apps/miniprogram/src/services/points.ts

@@ -56,6 +56,10 @@ export async function listProducts(params?: {
   return api.get<ProductListResponse>('/health/points/products', params);
 }
 
+export async function getProduct(productId: string) {
+  return api.get<PointsProduct>(`/health/points/products/${productId}`);
+}
+
 // ===== 兑换订单 =====
 
 export interface PointsOrder {