/**
 * Announce a message to screen readers.
 * SSR-safe: no-op when document is not available.
 */
export declare function announce(message: string, priority?: 'polite' | 'assertive'): void;
/**
 * Format size for screen reader announcement
 */
export declare function formatSizeForAnnouncement(size: number): string;
/**
 * Generate accessible label for divider
 */
export declare function getDividerLabel(index: number, direction: 'horizontal' | 'vertical'): string;
/**
 * Get keyboard instructions for divider
 */
export declare function getKeyboardInstructions(direction: 'horizontal' | 'vertical'): string;
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