优化结构

internal/integration/payment/gopay_helpers.go

@@ -4,11 +4,10 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"kra/internal/biz/system"
 	"net/http"
 	"strings"
 
-	"kra/internal/biz"
-
 	"github.com/go-pay/gopay"
 	"github.com/go-pay/gopay/douyin"
 )
@@ -16,7 +15,7 @@ import (
 // The adapters in this package intentionally keep GoPay request/response
 // models below the data boundary. The business layer only sees PaymentResult.
 
-func callbackRequest(callback *biz.PaymentCallback) (*http.Request, error) {
+func callbackRequest(callback *system.PaymentCallback) (*http.Request, error) {
 	request, err := http.NewRequest(http.MethodPost, "http://payment-callback.local", bytes.NewReader(callback.Body))
 	if err != nil {
 		return nil, err