/**
 * 会话存储 — 内存会话追踪（Map 插入序 LRU）
 */
import type { SessionInfo } from "../types.js";
export declare class SessionStore {
    private readonly maxSessions;
    private sessions;
    private cleanupTimer;
    constructor(maxSessions?: number, cleanupIntervalMs?: number);
    /** 记录或更新会话（同时维护 Map 插入序 = 最近活跃序） */
    touch(opts: {
        session: string;
        accountId: string;
        chatType: "direct" | "group";
        from: string;
    }): SessionInfo;
    /** 获取单个会话 */
    get(session: string): SessionInfo | undefined;
    /** 列出所有活跃会话 */
    list(filter?: {
        accountId?: string;
        chatType?: string;
    }): SessionInfo[];
    /** 删除会话 */
    delete(session: string): boolean;
    /** 会话总数 */
    get size(): number;
    /** 清理过期会话 */
    private cleanup;
    destroy(): void;
}
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