/**
 * Custom undo/redo stack with configurable depth.
 * Provides better reliability than browser's built-in undo.
 */
export declare class HistoryManager {
    private stack;
    private index;
    private maxSize;
    private editorArea;
    /**
     * Called after every undo/redo restore so the host can re-wire interactive
     * structures (table resize handles, code block selects, task checkboxes, etc.)
     * that are lost when innerHTML is replaced.
     */
    onRestore?: () => void;
    constructor(editorArea: HTMLElement, maxSize?: number);
    /** Record current state */
    push(html: string): void;
    undo(): void;
    redo(): void;
    canUndo(): boolean;
    canRedo(): boolean;
    private moveCursorToEnd;
}
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