feat(success): 充值文案展示

pages/pay/success.vue

@@ -17,9 +17,7 @@
       </view>
 
       <view class="success-title">{{ paySuccessText }}</view>
-      <view
-        v-if="isRecharge === undefined && payStatus === 1"
-        class="success-subtitle"
+      <view v-if="!isRecharge && payStatus === 1" class="success-subtitle"
         >您的订单已支付完成</view
       >
     </view>
@@ -46,7 +44,7 @@
     <view class="action-section">
       <view class="button-group">
         <button
-          v-if="isRecharge === undefined"
+          v-if="!isRecharge"
           class="btn btn-secondary"
           @click="goToOrderList"
         >