[结束提示音]：完成对话结束音效提示，包含本地短音生成、恢复待机播放和配置测试

src/owner_voice_pet/runtime.py

@@ -33,7 +33,7 @@ from .models import AudioSegment, ErrorCode, PipelineState, ProviderError
 from .protocols import AudioTransport, LlmProvider, RealtimeSttProvider, SttProvider, TtsProvider, WakeWordProvider
 from .stt import CloudAsrSttProvider, SherpaOnnxSttProvider, is_valid_transcript_text
 from .transport import SoundDeviceAudioTransport
-from .tts import CloudTtsProvider, MacSayTtsProvider, SentenceBuffer, sanitize_tts_text
+from .tts import CloudTtsProvider, MacSayTtsProvider, SentenceBuffer, make_prompt_chime, sanitize_tts_text
 from .vad import EnergyVadProvider, HybridVadProvider, PrimarySpeakerVadRecorder, SherpaOnnxVadProvider, VadRecorder
 from .wakeword import SherpaOnnxKeywordWakeWordProvider
 
@@ -323,6 +323,7 @@ class LiveVoiceRuntime:
                 turn_id,
             )
         self.context.append_assistant(spoken_text)
+        self._play_end_chime()
         self._event(STANDBY_RESUMED, PipelineState.WAKE_LISTENING, "恢复待机：可继续唤醒", turn_id=turn_id)
         return TurnResult(True, user_text, spoken_text, states=list(self._states))
 
@@ -339,6 +340,20 @@ class LiveVoiceRuntime:
         self._drain_input_after_playback()
         return spoken_sentence
 
+    def _play_end_chime(self) -> None:
+        if not self.config.end_chime_enabled:
+            return
+        segment = make_prompt_chime(
+            frequency_hz=self.config.end_chime_frequency_hz,
+            duration_ms=self.config.end_chime_duration_ms,
+            sample_rate=self.config.sample_rate,
+            channels=self.config.channels,
+        )
+        playback = self.transport.play_pcm(segment)
+        if playback.error:
+            return
+        self._drain_input_after_playback()
+
     def _recover(self, error: ProviderError, turn_id: int) -> TurnResult:
         self._event(STAGE_ERROR, PipelineState.ERROR_RECOVERING, error.message, turn_id=turn_id, payload={"error": error})
         self._event(RECOVERING, PipelineState.ERROR_RECOVERING, "恢复待机：本轮已结束", turn_id=turn_id)