/**
 * ConnectionBanner — minimal, action-only surface for degraded realtime.
 *
 * Industry alignment (Intercom / Slack / iMessage):
 *
 *  - The **initial attach** ("connecting") is invisible. The user can
 *    already see their history (painted from the REST hydrate) and the
 *    SDK queues anything they type until realtime attaches, so there is
 *    nothing actionable to surface. The old "Connecting…" banner was
 *    visual noise that flashed on every channel switch and `vt.identify()`.
 *
 *  - **Reconnecting** (Ably is `suspended` / `disconnected` mid-session
 *    and retrying) only surfaces after a 2.5 s grace window so the brief
 *    blips that happen on a healthy network never reach the UI. When it
 *    does appear it's a compact inline pill with a pulsing dot — not a
 *    full-width amber banner — so it doesn't dominate the conversation.
 *
 *  - **Failed** (Ably terminal failure) is the only state that asks the
 *    user to do something, so we render an actionable card with a Retry
 *    button instead of a passive "refresh to retry" hint.
 *
 * Anything that needs to know the SDK is mid-attach (e.g. typing
 * indicators) reads `store.realtimeReady` directly — this banner is
 * purely a user-facing surface.
 */
import type { JSX } from "preact";
import type { ChatStore } from "../store/chat-store";
interface ConnectionBannerProps {
    store: ChatStore;
}
export declare function ConnectionBanner({ store, }: ConnectionBannerProps): JSX.Element | null;
export {};