Method wirePtyEvents

src/server/web/session-manager.ts:236–265

* Wire PTY → scrollback + WebSocket. * Called once per session lifetime (idempotent via `wiredPtys` guard).

(token: string, pty: IPty)

   * Called once per session lifetime (idempotent via `wiredPtys` guard).
   */
  private wirePtyEvents(token: string, pty: IPty): void {
    if (this.wiredPtys.has(token)) return;
    this.wiredPtys.add(token);

    const session = this.store.get(token);
    if (!session) return;

    pty.onData((data: string) => {
      // Always capture to scrollback for future replay
      session.scrollback.write(data);
      // Forward to the currently attached WebSocket, if any
      const ws = session.ws;
      if (ws && ws.readyState === 1 /* OPEN */) {
        ws.send(data);
      }
    });

    pty.onExit(({ exitCode, signal }) => {
      this.wiredPtys.delete(token);
      console.log(
        `[session ${token.slice(0, 8)}] PTY exited: code=${exitCode}, signal=${signal}`,
      );
      const ws = session.ws;
      if (ws && ws.readyState === 1 /* OPEN */) {
        ws.send(JSON.stringify({ type: "exit", exitCode, signal }));
        ws.close(1000, "PTY exited");
      }
      this.store.destroy(token);
    });
  }

  /**
   * Wire WebSocket → PTY (input, resize, ping).