[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

tests/test_models_config.py

@@ -70,11 +70,11 @@ class ModelsConfigTests(unittest.TestCase):
             self.assertEqual(config.llm_api_key, "secret-value")
             self.assertEqual(config.llm_model, "test-model")
             self.assertEqual(config.wake_provider, "local_kws")
-            self.assertEqual(config.wake_kws_threshold, 0.25)
+            self.assertEqual(config.wake_kws_threshold, 0.15)
             self.assertEqual(config.wake_kws_score, 1.0)
             self.assertEqual(config.wake_ack_text, "我在")
-            self.assertEqual(config.post_playback_drain_ms, 250)
-            self.assertEqual(config.vad_provider, "local")
+            self.assertEqual(config.post_playback_drain_ms, 50)
+            self.assertEqual(config.vad_provider, "hybrid")
             self.assertEqual(config.vad_threshold, 0.5)
             self.assertEqual(config.vad_min_duration_ms, 250)
             self.assertEqual(config.vad_end_silence_ms, 350)
@@ -98,7 +98,7 @@ class ModelsConfigTests(unittest.TestCase):
         errors = config.validate_basic()
         self.assertTrue(any("OWNER_WAKE_PROVIDER" in error.message for error in errors))
 
-    def test_vad_provider_must_be_local_or_energy(self) -> None:
+    def test_vad_provider_must_be_hybrid_local_or_energy(self) -> None:
         config = AppConfig(vad_provider="invalid")
         errors = config.validate_basic()
         self.assertTrue(any("OWNER_VAD_PROVIDER" in error.message for error in errors))