/**
 * The hover outline the panel draws over an element in the page.
 *
 * Its own module because two transports drive it: the in-page channel (the
 * fast path, no server in the loop) and the Vite HMR command channel (the
 * fallback, for a panel with no page script to handshake with). Both end up
 * here, so the box is created once and behaves identically either way.
 *
 * Deliberately independent of the source overlay, which draws its own,
 * richer highlight — this one has to work whether or not `sourceOverlay` is
 * enabled.
 */
/** Draw the outline over `el`. */
export declare const showHighlight: (el: Element) => void;
/** Most elements outlined at once, so a long list cannot flood the page. */
export declare const MAX_OUTLINES = 200;
/** Hide every outline. Cheap and safe before any box has been built. */
export declare const clearHighlight: () => void;
/**
 * Outline each element in `ids` that still resolves and is on screen,
 * replacing the single hover outline. Returns how many were drawn.
 */
export declare const highlightAll: (ids: readonly number[]) => number;
/**
 * Outline the element with this id, or clear it for `null` — and also when
 * the id no longer resolves, since a stale outline over the wrong element is
 * worse than none.
 */
export declare const highlightById: (id: number | null) => void;
/**
 * Scroll the element with this id into view and outline it until the scroll
 * has settled. The box is `position: fixed`, so it is redrawn every frame
 * while the page scrolls rather than once at the start. Unknown ids do
 * nothing.
 */
export declare const revealById: (id: number) => void;
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