import type { FC } from 'react';
interface TreeCheckboxProps {
    checked: boolean;
    indeterminate: boolean;
    disabled: boolean;
    readOnly: boolean;
}
/**
 * TreeCheckbox — Stateless appearance primitive.
 *
 * Renders the checkbox in exactly 3 visual states:
 * - Unchecked: empty bordered box
 * - Checked: filled box with check SVG
 * - Indeterminate: filled box with dash SVG
 *
 * This component is purely presentational:
 * NO state, NO hooks, NO event handlers, NO useTree import.
 */
export declare const TreeCheckbox: FC<TreeCheckboxProps>;
export {};
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