feat(product-center): implement full product center with NestJS backend, Vue3 admin, and Nuxt4 website page

- NestJS backend: Prisma + PostgreSQL, JWT auth, CRUD for goods/categories/countries/tags/positions, SDS sync with cron, public API, Swagger docs
- Vue3 Admin: Element Plus, goods/categories/countries/tags/positions/sync management pages, batch operations, login with JWT
- Nuxt4 Website: product-center page with sidebar navigation, country filter, search, product grid, pagination, skeleton loading
- Nitro proxy routes for backend API
- 54 backend tests passing
- Updated docs and README

inkreach-official-admin/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "inkreach-official-admin",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc -b && vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@element-plus/icons-vue": "^2.3.2",
+    "@vueuse/core": "^14.3.0",
+    "axios": "^1.18.0",
+    "dayjs": "^1.11.21",
+    "element-plus": "^2.14.2",
+    "pinia": "^3.0.4",
+    "vue": "^3.5.34",
+    "vue-router": "^4.6.4"
+  },
+  "devDependencies": {
+    "@types/node": "^24.12.3",
+    "@vitejs/plugin-vue": "^6.0.6",
+    "@vue/tsconfig": "^0.9.1",
+    "sass": "^1.101.0",
+    "typescript": "~6.0.2",
+    "unplugin-auto-import": "^21.0.0",
+    "unplugin-vue-components": "^32.1.0",
+    "vite": "^8.0.12",
+    "vue-tsc": "^3.2.8"
+  }
+}