throwValidationError(messages -> messages.addErrorsDesignFileNameIsInvalid("designFile"), this::asListHtml);
            }
        }
        if (StringUtil.isBlank(fileName)) {
            throwValidationError(messages -> messages.addErrorsDesignFileNameIsNotFound("designFile"), this::asListHtml);
        }

        final File baseDir = new File(getServletContext().getRealPath("/"));

    /**
     * The multipart file containing design resources to be uploaded.
     * This can include CSS files, JSP templates, images, or other design assets.
     */
    @Required
    public MultipartFormFile designFile;

    /**
     * The name for the design file being uploaded.
     * Must not contain invalid file system characters like backslash, colon, asterisk, etc.
     */