import { type ClassValue } from 'clsx';
/** Merge conditional + conflicting Tailwind classes. */
export declare function cn(...inputs: ClassValue[]): string;
/**
 * Generate a UUID. Uses the built-in Web Crypto `crypto.randomUUID()` when
 * available (all modern browsers + Node 19+), and falls back to a
 * `crypto.getRandomValues`-based v4 UUID for old Safari / non-secure (http://)
 * contexts, then to `Math.random()` as a last resort. Zero dependencies.
 */
export declare function uid(): string;
/**
 * Format an epoch-ms timestamp as a short local date-time label using the
 * built-in `Intl.DateTimeFormat` (no `dayjs`/external dependency).
 */
export declare function formatLocalDateTime(epochMs: number, locale?: string): string;