/**
 * Convert Unix timestamp to human-readable format
 *
 * @param timestamp - Unix timestamp to convert
 * @returns Human-readable date string
 */
export declare function formatTimestamp(timestamp: number): string;
/**
 * Convert period in seconds to human-readable format
 *
 * @param seconds - Period in seconds to convert
 * @returns Human-readable period string
 */
export declare function formatPeriod(seconds: number): string;