update: 优化vad判断逻辑

main/xiaozhi-server/core/connection.py

@@ -117,8 +117,8 @@ class ConnectionHandler:
         self.client_have_voice = False
         self.last_activity_time = 0.0  # 统一的活动时间戳（毫秒）
         self.client_voice_stop = False
-        self.client_voice_window = deque(maxlen=5)
         self.last_is_voice = False
+        self.continuous_false_count = 0
 
         # asr相关变量
         # 因为实际部署时可能会用到公共的本地ASR，不能把变量暴露给公共ASR