【功能修复】修复退款时应用AppKey为空的问题

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/convert/aftersale/AfterSaleConvert.java

@@ -43,7 +43,8 @@ public interface AfterSaleConvert {
             @Mapping(source = "afterSale.orderId", target = "merchantOrderId"),
             @Mapping(source = "afterSale.id", target = "merchantRefundId"),
             @Mapping(source = "afterSale.applyReason", target = "reason"),
-            @Mapping(source = "afterSale.refundPrice", target = "price")
+            @Mapping(source = "afterSale.refundPrice", target = "price"),
+            @Mapping(source = "orderProperties.payAppKey", target = "appKey")
     })
     PayRefundCreateReqDTO convert(String userIp, AfterSaleDO afterSale,
                                   TradeOrderProperties orderProperties);