Curtain Parting Reveal

"use client";

import { useEffect, useId, useRef } from "react";
import type { ReactNode } from "react";

/**
 * CurtainPartingReveal — a feature section whose picture is behind two
 * reeded panels that part from the centre as you scroll.
 *
 * The panels meet on a double gold hairline, the seam. As the picture rises
 * through the viewport the seam splits and the two panels draw apart toward
 * the edges, tied to the scroll position rather than a timer, so the reader
 * controls the pace and can close them again by scrolling back. The picture
 * settles from a slight enlargement as it opens. When it is fully open the
 * caption below comes forward, set on an asymmetric catalogue grid: a lot
 * or plate reference on the left, the text on the right.
 *
 * Give it `media` (an image) or `children` for any other content in the

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}