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/api/prisma/schema.prisma

@@ -22,6 +22,7 @@ model OriginGood {
   goodName    String?  @map("good_name")
   goodImage   String?  @map("good_image")
   goodPrice   Decimal? @map("good_price") @db.Decimal(12, 2)
+  delisted    Boolean  @default(false)
   createdAt   DateTime @default(now()) @map("created_at") @db.Timestamptz(6)
   updatedAt   DateTime @default(now()) @updatedAt @map("updated_at") @db.Timestamptz(6)