/**
 * Extracts the local date portion from an ISO 8601 zoned datetime string.
 *
 * - Extracts date components (year, month, day) from a ZonedDateTime.
 * - Returns "" for invalid input.
 *
 * @param value ISO 8601 zoned datetime string
 * @returns Local date string YYYY-MM-DD or "" for invalid
 *
 * @example chopZonedTime("2024-02-29T14:30:45.123-05:00[America/New_York]") // "2024-02-29"
 * @example chopZonedTime("invalid") // ""
 */
export declare function chopZonedTime(value: string): string;