[打断低延迟修复]：完成真实播报打断门控修正，包含短保护窗口、用户音色优先和诊断输出

tests/test_barge_in.py

@@ -197,6 +197,49 @@ class BargeInTests(unittest.TestCase):
 
         self.assertFalse(monitor.interrupted)
 
+    def test_user_profile_match_can_override_render_echo_candidate(self) -> None:
+        gate = BargeInSpeakerGate(
+            enabled=True,
+            user_similarity_threshold=0.62,
+            assistant_reject_threshold=0.72,
+            min_rms=0.001,
+        )
+        gate.remember_user_segment(segment_for_speaker("owner"))
+        assistant = AudioSegment(b"\x01\x20\x02\x20" * 320, 16000, 1, 0, 40, {"speaker_id": "assistant"})
+        frames = [
+            AudioFrame(
+                assistant.pcm[: 640 * 2],
+                16000,
+                1,
+                20 * idx,
+                idx,
+                {"duration_ms": 20, "speech": True, "speaker_id": "owner"},
+            )
+            for idx in (1, 2)
+        ]
+        transport = MemoryAudioTransport(frames)
+        transport.start_input()
+        monitor = AsyncBargeInMonitor(
+            transport=transport,
+            vad_provider=EnergyVadProvider(threshold=1),
+            realtime_stt=None,
+            speaker_gate=gate,
+            assistant_profile=gate.assistant_profile(assistant),
+            assistant_reference=assistant,
+            echo_guard_ms=0,
+            min_speech_ms=40,
+            listen_interval_ms=1,
+        )
+        monitor.vad_provider.load()
+
+        monitor.start()
+        deadline = time.monotonic() + 1
+        while not monitor.interrupted and time.monotonic() < deadline:
+            time.sleep(0.005)
+        monitor.stop()
+
+        self.assertTrue(monitor.interrupted)
+
 
 if __name__ == "__main__":
     unittest.main()