/**
 * usePrefersReducedMotion Hook
 *
 * Reactive subscription to the `prefers-reduced-motion: reduce` media
 * query. Returns true when the user has asked the OS to minimize
 * non-essential motion; components should disable decorative animation
 * (typewriter reveals, entrance transitions, pulses) in that case.
 *
 * Safe in non-browser/test environments: returns false when
 * `window.matchMedia` is unavailable.
 */
export declare function usePrefersReducedMotion(): boolean;