Function shutdown

src/main.tsx:4026–4034

()

      });
      let shuttingDown = false;
      const shutdown = async () => {
        if (shuttingDown) return;
        shuttingDown = true;
        // Stop accepting new connections before tearing down sessions.
        server.stop(true);
        await sessionManager.destroyAll();
        await removeServerLock();
        process.exit(0);
      };
      process.once('SIGINT', () => void shutdown());
      process.once('SIGTERM', () => void shutdown());
    });