import type { MindMapNode } from '../types';
/**
 * Linear undo/redo history for the mind map.
 *
 * Each entry stores the data tree (full JSON snapshot) plus the
 * multi-select state, so undo / redo restores both the tree shape
 * and the user's selection.  Snapshots are deep-cloned JSON
 * strings (one string per state).  The timeline is bounded so a
 * long session doesn't grow without limit.
 */
export interface HistoryState {
    data: MindMapNode;
    /** Selected node ids at snapshot time.  Optional so older
     *  snapshots without it remain loadable. */
    selectedIds?: string[];
}
export declare function useHistory(maxSize?: number): {
    canUndo: () => boolean;
    canRedo: () => boolean;
    record: (snapshot: HistoryState) => void;
    undo: () => HistoryState | null;
    redo: () => HistoryState | null;
    reset: () => void;
};