/** Take (or increment) the page-scroll lock. No-op off web. */
export declare const acquirePageScrollLock: () => void;
/** Release (or decrement) the page-scroll lock. No-op off web. */
export declare const releasePageScrollLock: () => void;
/**
 * Drop the lock regardless of depth. Only for teardown paths that cannot know
 * how many acquisitions leaked (hot reload, error boundaries, tests).
 */
export declare const resetPageScrollLock: () => void;
/** Current lock depth. Exposed for tests. */
export declare const getPageScrollLockCount: () => number;