/**
 * @fileoverview localStorage-backed CRUD for guest (unauthenticated) chat history.
 *
 * Mirrors the shape of server-persisted chats so guest users can create,
 * read, update, and delete chats entirely client-side without an account.
 */
import { Message } from "../components/ChatConversation/ChatWindow";
import type { ChatFile as File } from "../types/chat";
export interface GuestChat {
    id: string;
    title: string;
    createdAt: string;
    focusMode: string;
    files?: File[];
    messages: Message[];
}
export declare function getGuestChats(): GuestChat[];
export declare function getGuestChat(chatId: string): GuestChat | null;
export declare function saveGuestChat(chat: GuestChat): void;
export declare function deleteGuestChat(chatId: string): void;
export declare function clearAllGuestChats(): void;
export declare function addMessageToGuestChat(chatId: string, message: Message): void;
export declare function createGuestChat(chatId: string, title: string, focusMode: string, files?: File[]): GuestChat;
export declare function updateGuestChatTitle(chatId: string, title: string): void;
export declare function updateGuestChatFiles(chatId: string, files: File[]): void;