/**
 * DiffHeader Component
 *
 * Header bar for the version comparison view showing versions and summary.
 */
import React from 'react';
export interface DiffHeaderProps {
    /**
     * The before version number.
     */
    beforeVersion: number;
    /**
     * The after version number.
     */
    afterVersion: number;
    /**
     * Number of added components.
     */
    added?: number;
    /**
     * Number of removed components.
     */
    removed?: number;
    /**
     * Number of modified components.
     */
    modified?: number;
    /**
     * Number of reordered components.
     */
    reordered?: number;
    /**
     * Callback when close button is clicked.
     */
    onClose: () => void;
    /**
     * Additional CSS class name.
     */
    className?: string;
}
/**
 * Renders a header bar for the version comparison view.
 */
export declare function DiffHeader({ beforeVersion, afterVersion, added, removed, modified, reordered, onClose, className, }: DiffHeaderProps): React.ReactElement;