Function cleanup

src/lib/token.ts:26–30

()

    let expirationTimeout: NodeJS.Timeout | null = null;

    const cleanup = () => {
      if (pollTimeout) clearTimeout(pollTimeout);
      if (expirationTimeout) clearTimeout(expirationTimeout);
      spinner.stop();
    };

    // Set up expiration timeout
    expirationTimeout = setTimeout(() => {