/**
 * Enum representing the layout mode for story panels.
 * Used to control how main and side panels are arranged in the UI.
 */
export declare enum StoryPanelLayout {
    /** Single panel layout (only one panel visible at a time, e.g. on small screens) */
    SINGLE = "single",
    /** Vertical layout (main and side panels stacked vertically or side-by-side) */
    VERTICAL = "vertical",
    /** Horizontal layout (main and side panels arranged horizontally) */
    HORIZONTAL = "horizontal"
}