import { ToolbarFontOption } from '../../../core/types/index.js';
/**
 * Normalize a font dropdown option so each row renders in its own typeface.
 *
 * Consumers can pass a minimal `{ label, key }` shape. The toolbar dropdown
 * spreads `option.props` onto each rendered `<li>`, so without an inline
 * `style.fontFamily` every row inherits the toolbar's UI font and the
 * dropdown loses its visual font preview. This fills that in from
 * `props.style.fontFamily` → `label` → `key` and keeps the existing
 * `data-item` hook that e2e selectors rely on.
 *
 * Idempotent: if `props.style.fontFamily` and `data-item` are already set,
 * the option is returned with those values preserved.
 */
export declare const normalizeFontOption: <T extends ToolbarFontOption>(option: T) => T;