/**
 * Comment mode: a full-viewport transparent capture layer (crosshair) inside
 * the shadow root, a dismissible hint bar, and numbered pins. Handles mouse and
 * touch. Pins live in document space so they stay glued to content on scroll.
 *
 * Pins are first-class objects, not decorations: they render whenever any
 * exist (dimmed while the widget is idle, full strength when engaged), expose
 * a ~36px hit target, show their comment on hover/focus, and open the thread
 * popover on click. Scroll/resize tracking is owned HERE, tied to pin
 * visibility, so a visible pin can never freeze mid-viewport regardless of
 * which surface (drawer, composer, popover) is coming or going.
 */
import type { Overlay, Runtime } from "../index";
export declare function createOverlay(rt: Runtime): Overlay;