优化结构

internal/data/payment/payment_helpers.go

@@ -3,17 +3,11 @@ package payment
 import "kra/pkg/paymentkit"
 
 func text(values map[string]any, key string) string {
-	value, _ := values[key].(string)
-	return value
+	return paymentutil.Text(values, key)
 }
 
 func firstAny(values map[string]any, keys ...string) string {
-	for _, key := range keys {
-		if value, ok := values[key].(string); ok && value != "" {
-			return value
-		}
-	}
-	return ""
+	return paymentutil.FirstText(values, keys...)
 }
 
 // configuredInt64 keeps repository-side validation independent from the