refactor(shop): 重构优惠券和礼品卡相关功能

- 优化了优惠券和礼品卡的搜索功能
- 重新设计了统计卡片的样式和布局- 改进了优惠券和礼品卡的领取和兑换流程
- 统一了图标样式和大小
- 调整了部分组件的显示逻辑

src/user/gift/redeem.tsx

@@ -39,7 +39,9 @@ const GiftCardRedeem = () => {
     setValidating(true)
     try {
       const gift = await validateGiftCode(codeToValidate.trim())
-      setValidGift(gift)
+      if(gift){
+        setValidGift(gift)
+      }
       Taro.showToast({
         title: '验证成功',
         icon: 'success'
@@ -138,7 +140,7 @@ const GiftCardRedeem = () => {
   return (
     <ConfigProvider>
       {/* 自定义导航栏 */}
-      <View className="flex items-center justify-between p-4 bg-white border-b border-gray-100">
+      <View className="flex items-center justify-between p-4 bg-white border-b border-gray-100 hidden">
         <View className="flex items-center" onClick={handleBack}>
           <ArrowLeft size="20" />
           <Text className="ml-2 text-lg">兑换礼品卡</Text>