[全双工打断]：完成常驻打断控制器，包含播放取消、推理取消和低延迟验收

tests/test_full_duplex_integration.py

@@ -5,6 +5,7 @@ import unittest
 from pathlib import Path
 
 from owner_voice_pet.agent_memory import FakeMemoryManager, MemoryRecordInput, SQLiteMemoryManager
+from owner_voice_pet.config import AppConfig
 from owner_voice_pet.full_duplex_audio import FakeWebRtcAudioProcessingProvider, RenderReferenceRingBuffer
 from owner_voice_pet.full_duplex_control import CancellationGraph, FullDuplexStateMachine
 from owner_voice_pet.full_duplex_response import (
@@ -15,6 +16,7 @@ from owner_voice_pet.full_duplex_response import (
     SentenceSegmenter,
 )
 from owner_voice_pet.full_duplex_speech import FakeStreamingSttProvider, FakeVadProvider, InterruptionDetector, TranscriptEvent
+from owner_voice_pet.full_duplex_runtime import FullDuplexAgentRuntime
 from owner_voice_pet.full_duplex_testing import (
     PerformanceMetricRecorder,
     build_fake_full_duplex_audio_fixture,
@@ -70,6 +72,27 @@ class FullDuplexIntegrationTests(unittest.TestCase):
         self.assertTrue(graph.root.cancelled)
         self.assertEqual(machine.current_state, PipelineState.LISTENING)
 
+    def test_full_duplex_runtime_interrupt_fixture_uses_audio_hub_and_buffers_user_audio(self) -> None:
+        runtime = FullDuplexAgentRuntime(
+            config=AppConfig(
+                audio_apm_provider="fake",
+                audio_apm_required=False,
+                barge_in_min_speech_ms=200,
+            )
+        )
+        fixture = build_fake_full_duplex_audio_fixture()[1:3]
+
+        summary = runtime.run_interrupt_fixture(fixture, initial_state=PipelineState.SPEAKING)
+
+        self.assertTrue(summary.interrupted)
+        self.assertTrue(runtime.cancellation_graph.root.cancelled)
+        self.assertEqual(runtime.state_machine.current_state, PipelineState.LISTENING)
+        self.assertIsNotNone(runtime.interrupt_controller)
+        self.assertEqual(
+            [item.frame_id for item in runtime.interrupt_controller.buffered_user_frames],
+            [2, 3],
+        )
+
     def test_streaming_stt_llm_tts_playback_order(self) -> None:
         stt = FakeStreamingSttProvider(
             scripted_events=[