feat(mall): classic B2B2C PC storefront with fixed mock API layer

- Mock adapter implementing @vmall/shared ApiClient (localStorage-persisted
  cart/orders/invoices), runtime switch via mockApi flag (default on)
- Fixed bilingual mock catalog: 3-level categories, 24 products w/ SKUs,
  stores, brands, banners, floors, seckill/collective/integral, comments,
  coupons, addresses, seeded orders/shipments/invoices
- B2B2C mall shell: top bar, logo/search/cart header, dark nav + category
  mega-menu, value-prop footer, back-to-top; 1200px grid, #ca151e theme
- UI primitives replacing element-plus: carousel, pagination, breadcrumb,
  qty stepper, rating stars, modal, tabs, step bar, product card
- Pages: home floors, search (filters/sort/paging), goods detail (SKU
  picker, store rail, review tabs), cart -> checkout -> pay -> success,
  auth pages, user center (dashboard/orders/addresses/favorites/coupons/
  invoices), stores, seckill, collective, integral
- i18n split into per-domain locale modules (en+zh)
- OpenSpec change mall-pc-storefront-replica archived; all specs green

apps/mall/locales/stores.ts

@@ -0,0 +1,60 @@
+export default {
+  en: {
+    stores: {
+      breadcrumbHome: "Home",
+      directory: "Store directory",
+      sortDefault: "Default",
+      sortDistance: "Distance",
+      distance: "{n} km away",
+      positiveRate: "Positive reviews 100%",
+      visitStore: "Visit store",
+      company: "Company",
+      region: "Region",
+      address: "Address",
+      storeProfile: "Store profile",
+      score: "Overall",
+      agreement: "Product",
+      service: "Service",
+      speed: "Delivery",
+      favorite: "Follow store",
+      favorited: "Following",
+      salesRank: "Top sellers",
+      storeProducts: "Store products",
+      sortPrice: "Price",
+      sortSales: "Sales",
+      sortComments: "Reviews",
+      noProducts: "This store has no products yet.",
+      unknownStore: "Store not found",
+      backToStores: "Back to stores",
+    },
+  },
+  zh: {
+    stores: {
+      breadcrumbHome: "首页",
+      directory: "店铺街",
+      sortDefault: "默认",
+      sortDistance: "距离",
+      distance: "距离 {n} 公里",
+      positiveRate: "好评率 100%",
+      visitStore: "进入店铺",
+      company: "公司",
+      region: "地区",
+      address: "地址",
+      storeProfile: "店铺信息",
+      score: "综合评分",
+      agreement: "商品质量",
+      service: "服务态度",
+      speed: "发货速度",
+      favorite: "收藏店铺",
+      favorited: "已收藏",
+      salesRank: "本店销量排行",
+      storeProducts: "店内商品",
+      sortPrice: "价格",
+      sortSales: "销量",
+      sortComments: "评论",
+      noProducts: "店铺暂时没有商品。",
+      unknownStore: "店铺不存在",
+      backToStores: "返回店铺街",
+    },
+  },
+} as const;