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/goods.ts

@@ -4,7 +4,7 @@ import type {
   CreateGoodRequest,
   UpdateGoodRequest,
   BatchCreateGoodsRequest,
-  UpdatePriorityRequest,
+  BatchPriorityRequest,
   GoodsFilter,
   PaginatedResult,
 } from '@/types'
@@ -40,8 +40,8 @@ export const goodsApi = {
     return request.post<any, Good[]>('/goods/batch', data)
   },
 
-  // Update priority
-  updatePriority: (data: UpdatePriorityRequest) => {
-    return request.patch<any, Good[]>('/goods/priority', data)
+  // Batch update priority
+  batchUpdatePriority: (data: BatchPriorityRequest) => {
+    return request.patch<any, { count: number }>('/goods/batch-priority', data)
   },
 }

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) => {

apps/admin/src/api/upload.ts

@@ -0,0 +1,14 @@
+import request from './request'
+
+export interface UploadResult {
+  url: string
+  filename: string
+}
+
+export const uploadApi = {
+  uploadImage: (file: File) => {
+    const formData = new FormData()
+    formData.append('file', file)
+    return request.post<any, UploadResult>('/upload/image', formData)
+  },
+}