import { FieldLockInfo } from '../types/index.js';
export declare class LockManager {
    private static locks;
    private static LOCK_EXPIRATION_MS;
    private static getLockKey;
    /**
     * Attempt to acquire or refresh a lock.
     * Returns { success: boolean, lock?: FieldLockInfo, currentLock?: FieldLockInfo }
     */
    static acquireLock(ticketId: string, field: 'title' | 'description', socketId: string, userId: string, userName: string): {
        success: boolean;
        lock?: FieldLockInfo;
        currentHolder?: FieldLockInfo;
    };
    /**
     * Release a lock by ticketId and field.
     */
    static releaseLock(ticketId: string, field: 'title' | 'description', socketId?: string): FieldLockInfo | null;
    /**
     * Release all locks held by a disconnected socket.
     */
    static releaseSocketLocks(socketId: string): FieldLockInfo[];
    /**
     * Get all active (non-expired) locks for a board/tickets.
     */
    static getActiveLocks(): FieldLockInfo[];
}