/**
 * HelpOverlay Component
 *
 * Keyboard shortcuts reference with Panel wrapping, two-column layout
 * for wide terminals, and visual category headers with underlines.
 *
 * @since v2.7.9 - Redesigned with Panel, two-column layout
 */
import React from 'react';
export interface Shortcut {
    key: string;
    description: string;
    category?: string;
}
export interface HelpOverlayProps {
    shortcuts: Shortcut[];
    contextShortcuts?: Shortcut[];
    title?: string;
    onClose?: () => void;
    isActive?: boolean;
}
declare function HelpOverlayBase({ shortcuts, contextShortcuts, title, onClose, isActive }: HelpOverlayProps): React.ReactElement;
export declare const HelpOverlay: React.MemoExoticComponent<typeof HelpOverlayBase>;
export declare const DEFAULT_SHORTCUTS: Shortcut[];
export {};
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