refactor(payment): 重构支付服务实现类

- 为 PaymentServiceImpl 类添加统一支付服务标识
- 在 PaymentController 中明确引用统一支付服务

src/main/java/com/gxwebsoft/payment/controller/PaymentController.java

@@ -38,7 +38,7 @@ import java.util.Map;
 @RequestMapping("/api/payment")
 public class PaymentController extends BaseController {
 
-    @Resource
+    @Resource(name = "unifiedPaymentServiceImpl")
     private PaymentService paymentService;
 
     @Operation(summary = "创建支付订单", description = "支持微信、支付宝、银联等多种支付方式")

src/main/java/com/gxwebsoft/payment/service/impl/PaymentServiceImpl.java

@@ -26,7 +26,7 @@ import java.util.stream.Collectors;
  * @since 2025-01-26
  */
 @Slf4j
-@Service
+@Service("unifiedPaymentServiceImpl")
 public class PaymentServiceImpl implements PaymentService {
 
     /**