/**
     * The multipart file containing the design content to upload.
     */
    public MultipartFormFile designFile;

    /**
     * The name of the design file being uploaded.
     */
    public String designFileName;

    /**
     * The target file name for the design file.
     */
    public String fileName;

     * Must not contain invalid file system characters like backslash, colon, asterisk, etc.
     */
    @Pattern(regexp = "^[^\\\\|/|:|\\*|?|\"|<|>|\\|]+$", message = "{errors.design_file_name_is_invalid}")
    public String designFileName;

    /**
     * Default constructor for UploadForm.
     * Creates a new instance with default values.
     */
    public UploadForm() {
        // Default constructor
    }