feat(ProductList): 支持通过URL参数shopId自动选择店铺

添加从URL参数中获取shopId的功能，当shopId存在且在店铺列表中时自动选中对应店铺

src/pages/product/ProductList.vue

@@ -137,10 +137,16 @@ const currentProducts = computed(() => {
 
 // 组件挂载时添加滚动监听
 onMounted(() => {
+  const urlParams = new URLSearchParams(window.location.search);
+  const shopIdParam = urlParams.get('shopId') || undefined;
+
   if (showShopList.value) {
     getShopListApi(wxStore.corpid).then((res) => {
       if (res?.code === 0 && res?.data?.length > 0) {
         shopList.value = res.data;
+        if (shopIdParam && shopList.value.some(shop => shop.shopId.toString() == shopIdParam)) {
+          handleShopSelect(parseInt(shopIdParam));
+        }
       }
     });
   } else {