/**
 * Return today's date in the given IANA timeZone as an ISO date string.
 *
 * - Uses Temporal.Now.zonedDateTimeISO to get current date in timezone.
 * - Returns "" for invalid timezone.
 *
 * @param ianaTimezone IANA timeZone identifier
 * @returns ISO date string (YYYY-MM-DD) or "" when invalid
 *
 * @example getZonedToday("America/New_York") // "2024-02-29"
 * @example getZonedToday("invalid") // ""
 */
export declare function getZonedToday(ianaTimezone: string): string;