优化结构

internal/integration/payment/douyin.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	bizpayment "kra/internal/biz/payment"
+	"kra/internal/paymentkit"
 	"strings"
 
 	"github.com/go-pay/gopay"
@@ -110,7 +111,7 @@ func douyinCreateMethod(extra, config map[string]any) (string, error) {
 	if value == "" {
 		value = firstAny(config, "method", "pay_method", "trade_type", "pay_type", "channel")
 	}
-	normalized := strings.NewReplacer(".", "_", "-", "_", " ", "_").Replace(strings.ToLower(strings.TrimSpace(value)))
+	normalized := paymentkit.NormalizePaymentMethod(value)
 	switch normalized {
 	case "", "jsapi", "js_api", "mini", "mini_program", "miniprogram", "applet":
 		return "jsapi", nil