/**
 * Subscribes to document visibility and calls the callback when the tab becomes visible
 * after the user has been inactive for at least INACTIVE_DEFAULT_TIMEOUT (5 minutes).
 *
 * Used to re-validate the auth token when the user returns to the tab. If the token
 * is no longer valid, the backend responds with NEED_RESET, triggering a reload and
 * redirect to the auth form.
 *
 * @param onVisible - Callback invoked when the tab becomes visible after the inactivity threshold (e.g. whoami / token check)
 */
export declare function useHandleVisibilityChange(onVisible: () => void): void;