[真实流程命令]：完成完整链路自测入口，包含真实Provider CLI、播放验收和文档测试

tests/test_real_live_check.py

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+from __future__ import annotations
+
+import unittest
+
+from owner_voice_pet.models import AudioFrame, AudioSegment, PlaybackResult, TransportHealth
+from owner_voice_pet.real_live_check import FixtureLiveAudioTransport
+
+
+def frame(idx: int) -> AudioFrame:
+    return AudioFrame(b"\x00\x00", 16000, 1, idx * 20, idx, {"duration_ms": 20})
+
+
+class FakeOutputTransport:
+    def __init__(self) -> None:
+        self.played: list[AudioSegment] = []
+
+    def play_pcm(self, segment: AudioSegment, interrupt: bool = False) -> PlaybackResult:
+        self.played.append(segment)
+        return PlaybackResult(True, segment.duration_ms)
+
+    def health(self) -> TransportHealth:
+        return TransportHealth(True, True, "fake")
+
+
+class RealLiveCheckTests(unittest.TestCase):
+    def test_fixture_transport_flush_preserves_generated_future_frames(self) -> None:
+        transport = FixtureLiveAudioTransport([frame(1), frame(2)], play_audio=False)
+        transport.start_input()
+
+        self.assertEqual(transport.flush_input(), 0)
+        self.assertEqual(transport.flush_count, 1)
+        self.assertEqual([item.frame_id for item in transport.read_frames(10)], [1])
+
+    def test_fixture_transport_can_delegate_real_playback(self) -> None:
+        output = FakeOutputTransport()
+        transport = FixtureLiveAudioTransport([], play_audio=True, output_transport=output)
+        segment = AudioSegment(b"\x00\x00", 16000, 1, 0, 20)
+
+        result = transport.play_pcm(segment)
+
+        self.assertTrue(result.played)
+        self.assertEqual(output.played, [segment])
+        self.assertEqual(transport.played_segments, [segment])
+
+
+if __name__ == "__main__":
+    unittest.main()