export type BreadcrumbItem = {
    label: string;
    /** Optional URL. When set on a non-last item, the crumb renders as an `<a href>`. */
    href?: string | null;
    /**
     * Optional click handler. When set on a non-last item WITHOUT an `href`, the crumb renders as a
     * `<button>` styled like an anchor. When both `href` and `on.click` are set, the anchor's click
     * event fires the callback before the browser navigates — the consumer can `preventDefault()`
     * for SPA routing.
     */
    on?: {
        click?: (event: MouseEvent) => void;
    };
};