import type { ArkmeArkoHistoryPage } from '../types.js';
import { ArkmeArkoConversationPreviewStore } from './arko-conversation-preview-store.js';
export declare const ARKO_CONVERSATION_PREVIEW_SYNC_INTERVAL_MS = 15000;
export interface ArkmeArkoPreviewVisibilityTarget {
    readonly visibilityState: string;
    addEventListener(type: 'visibilitychange', listener: () => void): void;
    removeEventListener(type: 'visibilitychange', listener: () => void): void;
}
export type ArkmeArkoPreviewHistoryLoader = (signal: AbortSignal) => Promise<ArkmeArkoHistoryPage>;
/**
 * Keeps the navigation preview fresh when Arko messages are written by another
 * client or a DSH Tool. Arko has no dedicated cross-device push projection, so
 * this foreground-only poll is the browser-side freshness owner.
 */
export declare class ArkmeArkoConversationPreviewSync {
    private readonly store;
    private readonly loadHistory;
    private readonly intervalMs;
    private readonly visibilityTarget;
    private running;
    private userId;
    private generation;
    private interval;
    private controller;
    private pending;
    private readonly onVisibilityChange;
    constructor(store?: ArkmeArkoConversationPreviewStore, loadHistory?: ArkmeArkoPreviewHistoryLoader, intervalMs?: number, visibilityTarget?: ArkmeArkoPreviewVisibilityTarget | undefined);
    start(userId: number): () => void;
    stop(): void;
    refresh(): Promise<void>;
}
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