import { type HTMLAttributes } from "react";
/**
 * UpdateBanner — top-of-app alert when a newer version is available.
 *
 * Controlled. Dismiss persistence (localStorage/cookie/etc) is the consumer's
 * responsibility (per EC-16 DOCUMENT). Component just fires `onDismiss`.
 */
export interface UpdateBannerProps extends Omit<HTMLAttributes<HTMLDivElement>, "title" | "children"> {
    currentVersion: string;
    latestVersion: string;
    onUpdate: () => void;
    onDismiss?: () => void;
    severity?: "info" | "warn";
    "data-testid"?: string;
}
export declare const UpdateBanner: import("react").ForwardRefExoticComponent<UpdateBannerProps & import("react").RefAttributes<HTMLDivElement>>;