feat(product-center): implement Figma-designed UI, upload module, and website tests

- Redesign website homepage & product-center per Figma (fonts, logos, hero/footer/customer cases)
- Add API upload module (multer) with static serving for uploads/public assets
- Add OriginGood.delisted flag and SDS request retry logic
- Add admin ImageUpload component and goods import/upload flows
- Add vitest suite for website components and composables (32 tests)
- Add skills, docs, plans and PRODUCT.md

apps/admin/src/api/sync.ts

@@ -3,7 +3,11 @@ import type { SyncLog } from '@/types'
 
 export const syncApi = {
   syncProducts: () => {
-    return request.post<any, SyncLog>('/sync/products')
+    return request.post<any, { message: string }>('/sync/products')
+  },
+
+  syncCategories: () => {
+    return request.post<any, { message: string }>('/sync/categories')
   },
 
   getSyncStatus: (limit?: number) => {