[唤醒应答与快速端点]：完成唤醒后我在播报和本地VAD端点优化，包含缓冲清理、配置项和测试覆盖

src/owner_voice_pet/config.py

@@ -24,6 +24,14 @@ class AppConfig:
     wake_keywords_file: Path | None = None
     wake_kws_threshold: float = 0.25
     wake_kws_score: float = 1.0
+    wake_ack_text: str = "我在"
+    post_playback_drain_ms: int = 250
+    vad_provider: str = "local"
+    vad_threshold: float = 0.5
+    vad_min_duration_ms: int = 250
+    vad_end_silence_ms: int = 350
+    vad_no_speech_timeout_ms: int = 5000
+    vad_max_recording_ms: int = 12000
     speech_provider: str = "cloud"
     asr_model: str = "mimo-v2.5-asr"
     tts_model: str = "mimo-v2.5-tts"
@@ -57,6 +65,14 @@ class AppConfig:
             wake_keywords_file=Path(value) if (value := get("WAKE_KEYWORDS_FILE")) else None,
             wake_kws_threshold=float(get("WAKE_KWS_THRESHOLD", "0.25") or "0.25"),
             wake_kws_score=float(get("WAKE_KWS_SCORE", "1.0") or "1.0"),
+            wake_ack_text=get("WAKE_ACK_TEXT", "我在") or "我在",
+            post_playback_drain_ms=int(get("POST_PLAYBACK_DRAIN_MS", "250") or "250"),
+            vad_provider=(get("VAD_PROVIDER", "local") or "local").lower(),
+            vad_threshold=float(get("VAD_THRESHOLD", "0.5") or "0.5"),
+            vad_min_duration_ms=int(get("VAD_MIN_DURATION_MS", "250") or "250"),
+            vad_end_silence_ms=int(get("VAD_END_SILENCE_MS", "350") or "350"),
+            vad_no_speech_timeout_ms=int(get("VAD_NO_SPEECH_TIMEOUT_MS", "5000") or "5000"),
+            vad_max_recording_ms=int(get("VAD_MAX_RECORDING_MS", "12000") or "12000"),
             speech_provider=(get("SPEECH_PROVIDER", "cloud") or "cloud").lower(),
             asr_model=get("ASR_MODEL", "mimo-v2.5-asr") or "mimo-v2.5-asr",
             tts_model=get("TTS_MODEL", "mimo-v2.5-tts") or "mimo-v2.5-tts",
@@ -152,6 +168,52 @@ class AppConfig:
                     "startup",
                 )
             )
+        if self.post_playback_drain_ms < 0:
+            errors.append(
+                ProviderError(
+                    ErrorCode.CONFIG_MISSING_VALUE,
+                    "OWNER_POST_PLAYBACK_DRAIN_MS must be non-negative",
+                    False,
+                    "config",
+                    "startup",
+                )
+            )
+        if self.vad_provider not in {"local", "energy"}:
+            errors.append(
+                ProviderError(
+                    ErrorCode.CONFIG_MISSING_VALUE,
+                    "OWNER_VAD_PROVIDER must be local or energy",
+                    False,
+                    "config",
+                    "startup",
+                )
+            )
+        if self.vad_threshold <= 0:
+            errors.append(
+                ProviderError(
+                    ErrorCode.CONFIG_MISSING_VALUE,
+                    "OWNER_VAD_THRESHOLD must be positive",
+                    False,
+                    "config",
+                    "startup",
+                )
+            )
+        for name, value in {
+            "OWNER_VAD_MIN_DURATION_MS": self.vad_min_duration_ms,
+            "OWNER_VAD_END_SILENCE_MS": self.vad_end_silence_ms,
+            "OWNER_VAD_NO_SPEECH_TIMEOUT_MS": self.vad_no_speech_timeout_ms,
+            "OWNER_VAD_MAX_RECORDING_MS": self.vad_max_recording_ms,
+        }.items():
+            if value <= 0:
+                errors.append(
+                    ProviderError(
+                        ErrorCode.CONFIG_MISSING_VALUE,
+                        f"{name} must be positive",
+                        False,
+                        "config",
+                        "startup",
+                    )
+                )
         if not self.llm_base_url.startswith(("http://", "https://")):
             errors.append(
                 ProviderError(