[真实全双工运行时]：完成run-agent-live可打断语音闭环，包含持续监听、软件回声抑制和播放取消验证

tests/test_live_runtime.py

@@ -261,6 +261,40 @@ def silence_frames(start_id: int, start_ms: int, count: int) -> list[AudioFrame]
 
 
 class LiveRuntimeTests(unittest.TestCase):
+    def test_agent_runtime_listens_without_wake_word(self) -> None:
+        frames = segment_frames(1, 20, partials=["直接提问", "直接提问"])
+        transport = MemoryAudioTransport(frames, flush_clears_input=False)
+        stt = QueueSttProvider(["直接提问"])
+        llm = QueueLlmProvider([["这是全双工回答。"]])
+        reporter = RecordingReporter()
+        runtime = VoiceAssistantPipeline(
+            config=AppConfig(
+                assistant_mode="full_duplex_agent",
+                llm_api_key="secret",
+                speech_provider="cloud",
+                wake_ack_text="",
+            ),
+            transport=transport,
+            wakeword=KeywordWakeWordProvider(),
+            vad_recorder=VadRecorder(EnergyVadProvider(), min_duration_ms=40, end_silence_ms=40),
+            stt=stt,
+            realtime_stt=MetadataSttProvider(),
+            llm=llm,
+            tts=SineTtsProvider(),
+            context=ConversationContext(),
+            reporter=reporter,
+            event_bus=PipelineEventBus(),
+        )
+
+        summary = runtime.run_agent(once=True)
+
+        self.assertEqual(summary.completed_turns, 1)
+        self.assertEqual(stt.calls[0].metadata["end_reason"], "silence")
+        self.assertEqual(reporter.transcripts, ["直接提问"])
+        self.assertIn("监听中：请直接说话", reporter.statuses)
+        self.assertNotIn("唤醒命中", reporter.statuses)
+        self.assertIn("恢复监听：可直接说话", reporter.statuses)
+
     def test_repeated_runtime_runs_two_turns_and_returns_to_standby(self) -> None:
         runtime, stt, llm, transport, reporter = make_runtime(["第一问", "第二问"])
         self.assertIsInstance(runtime, VoiceAssistantPipeline)