export type NotificationType = 'success' | 'error' | 'info';
export interface NotificationState {
    type: NotificationType;
    message: string;
}
export interface UseNotificationApi {
    notification: NotificationState | null;
    notify: (type: NotificationType, message: string, durationMs?: number) => void;
    dismiss: () => void;
}
/**
 * Single-slot notification toast with timer coalescing.
 *
 * Back-to-back `notify()` calls cancel the previous auto-dismiss timer so a
 * slow earlier toast cannot wipe out a fresher one. The timer is also cleared
 * on unmount to avoid a setState-after-unmount warning when the user navigates
 * away mid-toast. A single `duration` of `Infinity` keeps the toast until the
 * caller dismisses it manually or a new `notify()` supersedes it.
 */
export declare function useNotification(): UseNotificationApi;