import { type ReactNode } from "react";
/**
 * Reserve the chat slot before starting expensive media work. Activation is
 * one-way: scrolling away must not discard an interactive preview's state.
 * The timeline parks at its initial tip in layout effects before this observer
 * is attached, so historical previews above the entry viewport stay dormant.
 */
export declare function DeferredChatMedia({ children, height, label, actionLabel, }: {
    children: ReactNode;
    height: number;
    /** What is loading, as in "Load {label}". */
    label?: string | undefined;
    /** The complete (translated) activation label; overrides `label`. */
    actionLabel?: string | undefined;
}): import("react").JSX.Element;