export type ThemeSpreadOrigin = {
    x: number;
    y: number;
};
/**
 * Circular theme reveal from a click. Chrome/Edge use View Transitions;
 * Safari/Firefox and reduced-motion apply immediately. Callers pass the
 * actual class/token mutation in `apply` — this helper does not own
 * localStorage or light/dark/system policy.
 *
 * Do not clone the live DOM as a fallback: editors and large trees are
 * too expensive to snapshot.
 */
export declare function runThemeSpread(apply: () => void | Promise<void>, origin?: ThemeSpreadOrigin): Promise<void>;