feat: 完成全部接口替换为新后端接口

miniprogram/services/site-api.ts

@@ -0,0 +1,12 @@
+import { apiRequest } from './api-request';
+import type { ApiWorksheet } from './content-api';
+/** 保留微信预拉取，动态兜底与后台刷新改由新后端提供。 */
+export function fetchPageConfig() {
+    return apiRequest<PageConfigData>('/page-config', { auth: 'none' });
+}
+export function fetchAgeRecommendations(ageBand: string) {
+    return apiRequest<{ ageBand: string; items: ApiWorksheet[] }>(
+        '/recommendations/age',
+        { auth: 'none', data: { ageBand } },
+    );
+}