refactor: formaliza formatos de áudio e alinhamento PCM

tests/js/voice-session.test.mjs

@@ -733,3 +733,14 @@ test("barge-in resets player before new TTS response", () => {
   assert.equal(finished, false);
   assert.equal(resetCount, 1);
 });
+
+
+test("session.ready configures output before starting microphone capture", () => {
+  const { controller } = makeController();
+  const operations = [];
+  const format = { encoding: "pcm_s16le", sample_rate: 24000, channels: 1 };
+  controller.player = { configure: (received) => operations.push(received) };
+  controller.startListening = () => operations.push("listen");
+  controller.handleGatewayEvent({ type: "session.ready", output_audio: format });
+  assert.deepEqual(operations, [format, "listen"]);
+});