feat: persist customer product and shop favorites through the live API

Replace mall fixture favorites with customer-scoped endpoints, and send signed-out shoppers back to the page they left after sign-in.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/mall/locales/stores.ts

@@ -18,6 +18,10 @@ export default {
       speed: "Delivery",
       favorite: "Follow store",
       favorited: "Following",
+      favoriteFailed: "Unable to update store favorite",
+      favoriteLoadFailed: "Unable to load store favorite",
+      notice: "Store notice",
+      afterSale: "After-sales policy",
       salesRank: "Top sellers",
       storeProducts: "Store products",
       sortPrice: "Price",
@@ -47,6 +51,10 @@ export default {
       speed: "发货速度",
       favorite: "收藏店铺",
       favorited: "已收藏",
+      favoriteFailed: "店铺收藏更新失败",
+      favoriteLoadFailed: "无法加载店铺收藏",
+      notice: "店铺公告",
+      afterSale: "售后服务",
       salesRank: "本店销量排行",
       storeProducts: "店内商品",
       sortPrice: "价格",