refactor: 调整首页数据获取API

- 将首页的数据获取由REST重构为GraphQL

app/models/mappers/homepageMapper.ts

@@ -11,7 +11,8 @@ export function toHomepageView(raw: Homepage): HomepageView {
   const carousel = (raw.carousel ?? [])
     .filter(isObject<HomepageFile>)
     .map((item) => item.directus_files_id)
-    .filter((item) => typeof item === 'string');
+    .filter(isObject<DirectusFile>)
+    .map((file) => file.id);
 
   const products = (raw.recommend_products ?? [])
     .filter(isObject<Product>)