let uxSessionId: string | null = null;
let lastActivityAt = Date.now();

export const sessionMemory = {
  get id() { return uxSessionId; },
  get lastActivityAt() { return lastActivityAt; },
  touch() { lastActivityAt = Date.now(); },
  set(id: string) { uxSessionId = id; lastActivityAt = Date.now(); },
  clear() { uxSessionId = null; lastActivityAt = Date.now(); },
};