import { randomUUID } from 'crypto'; type AdminSessionRecord = {  adminKey: string;  expiresAt: number;}; const sessions = new Map<string, AdminSessionRecord>(); function purgeExpiredSessions() {  const now = Date.now();  for (const [token, session] of sessions.entries()) {    if (session.expiresAt <= now) {      sessions.delete(token);    }  }} export function createAdminSessionToken(adminKey: string, maxAgeSeconds: number): string {  purgeExpiredSessions();  const token = randomUUID();  sessions.set(token, {    adminKey,    expiresAt: Date.now() + maxAgeSeconds * 1000,  });  return token;} export function resolveAdminSessionToken(token: string): string {  purgeExpiredSessions();  const session = sessions.get(token);  if (!session) return '';  return session.adminKey;} export function hasAdminSessionToken(token: string): boolean {  return Boolean(resolveAdminSessionToken(token));} export function clearAdminSessionToken(token: string): void {  if (!token) return;  sessions.delete(token);}