fix(shop): 修复支付回调状态判断逻辑，确保订单状态更新

- 将支付成功状态判断由字符串比较改为枚举值比较
- 使用 Transaction.TradeStateEnum.SUCCESS 替代 "支付成功" 字符串判断
- 避免因状态描述字符串不一致导致支付回调处理失败
- 保证支付成功后订单状态能够正确更新

src/main/java/com/gxwebsoft/shop/controller/ShopOrderController.java

@@ -888,7 +888,8 @@ public class ShopOrderController extends BaseController {
             logger.info("✅ 异步通知解析成功 - 交易状态: {}, 商户订单号: {}",
                     transaction.getTradeStateDesc(), transaction.getOutTradeNo());
 
-            if (StrUtil.equals("支付成功", transaction.getTradeStateDesc())) {
+            // 使用枚举值判断支付状态，避免依赖状态描述字符串
+            if (Transaction.TradeStateEnum.SUCCESS.equals(transaction.getTradeState())) {
                 final String outTradeNo = transaction.getOutTradeNo();
                 final String transactionId = transaction.getTransactionId();
                 final Integer total = transaction.getAmount().getTotal();