Method flush

src/ink/terminal-querier.ts:170–175

* Send the DA1 sentinel. Resolves when DA1's response arrives. * * As a side effect, all queries still pending when DA1 arrives are * resolved with `undefined` (terminal didn't respond → doesn't support * the query). This is the barrier that makes send() timeout-free. * * Safe to c

()

   * Safe to call with no pending queries — still waits for a round-trip.
   */
  flush(): Promise<void> {
    return new Promise(resolve => {
      this.queue.push({ kind: 'sentinel', resolve })
      this.stdout.write(SENTINEL)
    })
  }

  /**
   * Dispatch a response parsed from stdin. Called by App.tsx's