[唤醒灵敏度与端点恢复]：完成唤醒提示顺序和Hybrid VAD优化，包含阈值默认值、缓冲时序和测试覆盖

src/owner_voice_pet/config.py

@@ -22,11 +22,11 @@ class AppConfig:
     log_dir: Path = Path("logs")
     wake_provider: str = "local_kws"
     wake_keywords_file: Path | None = None
-    wake_kws_threshold: float = 0.25
+    wake_kws_threshold: float = 0.15
     wake_kws_score: float = 1.0
     wake_ack_text: str = "我在"
-    post_playback_drain_ms: int = 250
-    vad_provider: str = "local"
+    post_playback_drain_ms: int = 50
+    vad_provider: str = "hybrid"
     vad_threshold: float = 0.5
     vad_min_duration_ms: int = 250
     vad_end_silence_ms: int = 350
@@ -63,11 +63,11 @@ class AppConfig:
             log_dir=Path(get("LOG_DIR", "logs") or "logs"),
             wake_provider=(get("WAKE_PROVIDER", "local_kws") or "local_kws").lower(),
             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_threshold=float(get("WAKE_KWS_THRESHOLD", "0.15") or "0.15"),
             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(),
+            post_playback_drain_ms=int(get("POST_PLAYBACK_DRAIN_MS", "50") or "50"),
+            vad_provider=(get("VAD_PROVIDER", "hybrid") or "hybrid").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"),
@@ -178,11 +178,11 @@ class AppConfig:
                     "startup",
                 )
             )
-        if self.vad_provider not in {"local", "energy"}:
+        if self.vad_provider not in {"hybrid", "local", "energy"}:
             errors.append(
                 ProviderError(
                     ErrorCode.CONFIG_MISSING_VALUE,
-                    "OWNER_VAD_PROVIDER must be local or energy",
+                    "OWNER_VAD_PROVIDER must be hybrid, local, or energy",
                     False,
                     "config",
                     "startup",