/** history.state key on entries pushed by opening a thread from the list or a search hit. */
export declare const DESK_FROM_LIST_KEY = "dcDeskFromList";
/** Marker value: unique per page load, so an entry left by an earlier document is never trusted. */
export declare const DESK_DOC_ID: string;
interface ThreadTarget {
    threadId: string;
    messageId?: string;
}
/**
 * Opening and leaving a thread. On phone a thread is its own history entry (marked) so the
 * browser back button returns to the list; otherwise leaving replaces the URL, never leaves the app.
 */
export declare const useDeskThreadNavigation: () => {
    openFromList: (target: ThreadTarget) => void;
    openThread: (target: ThreadTarget, hostUrl: string) => void;
    backToList: () => void;
};
export {};
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