/**
 * Time-of-day greeting key.
 * Maps to bundled i18n keys in `_global` namespace: goodMorning / goodAfternoon / goodEvening.
 */
export type TimeOfDayKey = 'goodMorning' | 'goodAfternoon' | 'goodEvening';
/**
 * Returns the i18n key for a time-of-day greeting based on the given date's hour.
 *
 * - 00:00 - 11:59 → 'goodMorning'
 * - 12:00 - 17:59 → 'goodAfternoon'
 * - 18:00 - 23:59 → 'goodEvening'
 *
 * Pure function (testable). Defaults to current local time.
 *
 * @example
 * import { getTimeOfDayKey } from 'valtech-components';
 *
 * const key = getTimeOfDayKey();          // 'goodMorning' | 'goodAfternoon' | 'goodEvening'
 * const text = i18n.t(key);               // 'Buenos días' | 'Buenas tardes' | 'Buenas noches'
 */
export declare function getTimeOfDayKey(date?: Date): TimeOfDayKey;