/**
 * @fileoverview Small shared utilities: Tailwind class merging and human-readable time formatting.
 */
import { type ClassValue } from 'clsx';
export declare function cn(...inputs: ClassValue[]): string;
/**
 * Formats a message timestamp as a short, locale-aware clock time (e.g. "12:29 PM").
 * Returns an empty string when the value can't be parsed into a valid date.
 */
export declare const formatMessageTime: (date: Date | string | number) => string;
export declare const formatTimeDifference: (date1: Date | string, date2: Date | string) => string;