/**
 * Day-level availability rules shared by the two booking pickers.
 *
 * The calendar endpoint already omits days a branch is closed, so a day it
 * never returns is simply absent. These rules cover what the endpoint cannot
 * express: a weekday a deployment never takes bookings on, and one-off blackout
 * dates — a holiday, a stock-take, a branch-wide event.
 *
 * A day matched here is rendered *disabled* rather than dropped, so a customer
 * can see the day exists and is merely not bookable, instead of wondering why
 * their calendar skips a date.
 */
/** Accepts `[5, 6]`, `"5,6"`, `"5 6"` or `"[5,6]"` — 0 is Sunday, 6 Saturday. */
export declare function parseWeekdayList(input?: string | number[] | null): number[];
/** Accepts an array or a comma/space separated string of `YYYY-MM-DD` dates. */
export declare function parseDateList(input?: string | string[] | null): string[];
/**
 * `2026-08-13` → 0 (Sunday) … 6 (Saturday).
 *
 * Built at midday on purpose: a midnight Date in a negative-offset zone rolls
 * back a day, which would shift every weekday by one.
 */
export declare function weekdayOf(date: string): number;
/** True when the day exists but must not be selectable. */
export declare function isDayBlocked(date: string, weekdays: number[], dates: string[]): boolean;