feat(conversation): TTS 投递与 WebSocket 管线；客户端播放门禁与会话页联动；COS 键与迁移脚本调整

app-expo/tests/features/voice/tts-playback-gate.test.ts

@@ -0,0 +1,14 @@
+import { createTtsPlaybackGate } from '@/features/voice/tts-playback-gate';
+
+describe('createTtsPlaybackGate', () => {
+  test('accepts TTS until interrupt, then drops until user sends', () => {
+    const gate = createTtsPlaybackGate();
+    expect(gate.shouldAcceptIncomingTts()).toBe(true);
+
+    gate.interrupt();
+    expect(gate.shouldAcceptIncomingTts()).toBe(false);
+
+    gate.onUserMessageSent();
+    expect(gate.shouldAcceptIncomingTts()).toBe(true);
+  });
+});