优化订单结算金额展示和钱包流水号

backend/internal/modules/order/repository.go

@@ -698,7 +698,11 @@ func (r *Repository) ListForUser(userID uint64) ([]OrderDTO, error) {
 	}
 	items := make([]OrderDTO, 0, len(rows))
 	for _, row := range rows {
-		items = append(items, row.toDTOForUser(userID))
+		dto := row.toDTOForUser(userID)
+		if shouldAttachCheckout(row.Status) {
+			dto.Checkout = r.latestCheckoutDTOForUser(row.ID, userID, row.RentalOrder)
+		}
+		items = append(items, dto)
 	}
 	return items, nil
 }
@@ -1312,6 +1316,15 @@ func (r *Repository) latestCheckoutAdminDTO(orderID uint64) *CheckoutDTO {
 	return &dto
 }
 
+func shouldAttachCheckout(status string) bool {
+	switch status {
+	case "pending_checkout_confirm", "pending_checkout_accept", "checkout_disputing", "completed":
+		return true
+	default:
+		return false
+	}
+}
+
 func (r *Repository) latestCheckoutDTOForUser(orderID uint64, userID uint64, order model.RentalOrder) *CheckoutDTO {
 	var checkout model.OrderCheckout
 	if err := r.db.Where("order_id = ?", orderID).Order("id DESC").First(&checkout).Error; err != nil {
@@ -1598,7 +1611,7 @@ func newOrderNo() (string, error) {
 	// 将2字节转为0-999的数字
 	randomNum := (int(buf[0])<<8 | int(buf[1])) % 1000
 
-	return "RO" + timeStr + strconv.Itoa(1000+randomNum)[1:], nil
+	return "RO" + timeStr + strconv.Itoa(1000 + randomNum)[1:], nil
 }
 
 func appendAuditLog(tx *gorm.DB, actorID uint64, action string, bizType string, bizID uint64, meta AuditMeta, detail map[string]any) error {