fix: 富友回调应答XMLName缺失 + term_ip自动探测服务器IP替代硬编码

internal/service/client_order/payment_provider.go

@@ -54,7 +54,7 @@ type fuiouPaymentProvider struct {
 // CreateJSAPIPayment 创建富友 JSAPI 预下单。
 func (f *fuiouPaymentProvider) CreateJSAPIPayment(ctx context.Context, orderNo, description, openID string, amount int) (*PaymentResult, error) {
 	amountStr := strconv.Itoa(amount)
-	resp, err := f.client.WxPreCreate(orderNo, amountStr, description, "127.0.0.1", f.tradeType, f.appID, openID)
+	resp, err := f.client.WxPreCreate(orderNo, amountStr, description, fuiou.GetServerIP(), f.tradeType, f.appID, openID)
 	if err != nil {
 		return nil, errors.Wrap(errors.CodeFuiouPayFailed, err, "富友预下单失败")
 	}