[实时转写]：完成录音期间转写显示，包含partial事件、本地streaming STT和终端实时反馈

src/owner_voice_pet/runtime.py

@@ -29,7 +29,7 @@ from .events import (
 )
 from .llm import OpenAICompatibleLlmProvider
 from .models import AudioSegment, ErrorCode, PipelineState, ProviderError
-from .protocols import AudioTransport, LlmProvider, SttProvider, TtsProvider, WakeWordProvider
+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
@@ -58,7 +58,7 @@ class TerminalRuntimeReporter:
 
     def transcript(self, text: str, *, final: bool, turn_id: int | None = None) -> None:
         prefix = f"[第{turn_id}轮] " if turn_id is not None else ""
-        label = "转写结果" if final else "转写中"
+        label = "转写结果" if final else "实时转写"
         print(f"{prefix}{label}：{text}", flush=True)
 
     def error(self, stage: str, code: str, message: str, *, turn_id: int | None = None) -> None:
@@ -336,6 +336,12 @@ def build_live_runtime(config: AppConfig, reporter: RuntimeReporter | None = Non
     else:
         stt = SherpaOnnxSttProvider(str(config.speech_models_dir))
         tts = MacSayTtsProvider()
+    realtime_stt: RealtimeSttProvider | None = None
+    if config.realtime_transcript_enabled:
+        if isinstance(stt, SherpaOnnxSttProvider):
+            realtime_stt = stt
+        else:
+            realtime_stt = SherpaOnnxSttProvider(str(config.speech_models_dir))
     if config.vad_provider == "hybrid":
         vad_provider = HybridVadProvider(
             SherpaOnnxVadProvider(config.speech_models_dir, threshold=config.vad_threshold),
@@ -375,6 +381,7 @@ def build_live_runtime(config: AppConfig, reporter: RuntimeReporter | None = Non
         ),
         vad_recorder=recorder_cls(**recorder_kwargs),
         stt=stt,
+        realtime_stt=realtime_stt,
         llm=OpenAICompatibleLlmProvider(config),
         tts=tts,
         ack_tts=MacSayTtsProvider(),