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/website/package.json

@@ -7,6 +7,7 @@
     "dev": "nuxt dev --host",
     "generate": "nuxt generate",
     "preview": "nuxt preview",
+    "test": "vitest",
     "postinstall": "nuxt prepare"
   },
   "dependencies": {
@@ -18,5 +19,11 @@
     "tailwindcss": "^4.3.0",
     "vue": "^3.5.34",
     "vue-router": "^5.0.7"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.7",
+    "@vue/test-utils": "^2.4.11",
+    "happy-dom": "^20.10.6",
+    "vitest": "^4.1.10"
   }
 }