/**
 * Restrict `value` to the range [`min`, `max`] in zoned datetime space.
 *
 * - Returns `value` if it falls within the bounds (inclusive on both ends).
 * - Returns `min` if `value` is before `min`.
 * - Returns `max` if `value` is after `max`.
 * - Returns `""` if any input is invalid or `min > max`.
 *
 * @param value ISO ZonedDateTime string to clamp
 * @param min ISO ZonedDateTime string for the lower bound (inclusive)
 * @param max ISO ZonedDateTime string for the upper bound (inclusive)
 * @returns The clamped zoned datetime string, or "" on invalid input
 *
 * @example clampZoned("2024-03-15T12:00:00+00:00[UTC]", "2024-03-01T00:00:00+00:00[UTC]", "2024-03-31T23:59:59+00:00[UTC]") // "2024-03-15T12:00:00+00:00[UTC]"
 * @example clampZoned("2024-02-01T12:00:00+00:00[UTC]", "2024-03-01T00:00:00+00:00[UTC]", "2024-03-31T23:59:59+00:00[UTC]") // "2024-03-01T00:00:00+00:00[UTC]"
 * @example clampZoned("2024-05-01T12:00:00+00:00[UTC]", "2024-03-01T00:00:00+00:00[UTC]", "2024-03-31T23:59:59+00:00[UTC]") // "2024-03-31T23:59:59+00:00[UTC]"
 * @example clampZoned("2024-03-15T12:00:00+00:00[UTC]", "2024-03-31T00:00:00+00:00[UTC]", "2024-03-01T00:00:00+00:00[UTC]") // ""
 * @example clampZoned("invalid", "2024-03-01T00:00:00+00:00[UTC]", "2024-03-31T23:59:59+00:00[UTC]") // ""
 */
export declare function clampZoned(value: string, min: string, max: string): string;