feat(payment): 接入扫呗普通支付2.0

backend/internal/modules/payment/presenter.go

@@ -102,6 +102,23 @@ func jsonString(value map[string]string) string {
 	}
 	return string(raw)
 }
+
+func paymentTraceTime(raw datatypes.JSON) string {
+	if len(raw) == 0 {
+		return ""
+	}
+	var payload map[string]any
+	if err := json.Unmarshal(raw, &payload); err != nil {
+		return ""
+	}
+	for _, key := range []string{"terminal_time", "pay_time"} {
+		if value, ok := payload[key].(string); ok && value != "" {
+			return value
+		}
+	}
+	return ""
+}
+
 func newPaymentNo() (string, error) {
 	buf := make([]byte, 4)
 	if _, err := rand.Read(buf); err != nil {