fix(order): 修复订单状态更新逻辑

- 添加条件判断确保只有当订单状态为2时才更新为0
- 防止已发货或已完成的订单被错误重置为待支付状态
- 保持支付成功后的其他订单属性更新逻辑不变

src/main/java/com/gxwebsoft/shop/service/impl/ShopOrderServiceImpl.java

@@ -490,7 +490,9 @@ public class ShopOrderServiceImpl extends ServiceImpl<ShopOrderMapper, ShopOrder
             if (result.getTradeState().equals(Transaction.TradeStateEnum.SUCCESS)) {
                 shopOrder.setPayStatus(true);
                 shopOrder.setPayTime(shopOrder.getCreateTime());
-                shopOrder.setOrderStatus(0);
+                if(shopOrder.getOrderStatus().equals(2)){
+                  shopOrder.setOrderStatus(0);
+                }
                 shopOrder.setTransactionId(result.getTransactionId());
                 updateById(shopOrder);
                 return true;