优化结构

internal/integration/payment/alipay.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"io"
 	bizpayment "kra/internal/biz/payment"
+	"kra/internal/paymentkit"
 	"net/http"
 	"net/url"
 	"strings"
@@ -435,7 +436,7 @@ func alipayCreateMethod(extra, config map[string]any) (string, error) {
 	if value == "" {
 		value = firstAny(config, "method", "pay_method", "trade_type", "channel")
 	}
-	normalized := strings.NewReplacer(".", "_", "-", "_", " ", "_").Replace(strings.ToLower(strings.TrimSpace(value)))
+	normalized := paymentkit.NormalizePaymentMethod(value)
 	switch normalized {
 	case "", "create", "trade_create", "alipay_trade_create", "jsapi", "miniapp", "mini_program":
 		return "alipay.trade.create", nil