import { type RefObject } from 'react';
export interface PlayheadProps {
    /**
     * Lane-area wrapper ref, used for coordinate conversion when dragging
     * the triangle handle. Clicking the handle seeks exactly like clicking
     * the ruler does — it's a visual affordance for the same intent.
     */
    areaRef: RefObject<HTMLElement | null>;
}
/**
 * Vertical red line tracking `clock.time` with a draggable triangle
 * handle at the top. Line position updates imperatively via the clock's
 * tick event so the React tree around it never re-renders at frame rate.
 */
export declare function Playhead({ areaRef }: PlayheadProps): import("react/jsx-runtime").JSX.Element;
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