Optimize VAD logic by replacing `np.max(probs)` with `any(prob >= threshold)` for improved readability and efficiency.

src/voice_dialogue/services/audio/vad.py

@@ -82,7 +82,7 @@ class SileroVAD:
                 prob = self._model(audio_slice, sample_rate).item()
                 probs.append(prob)
 
-            return np.max(probs) > self.threshold
+            return any(prob >= self.threshold for prob in probs)
         except Exception as e:
             logger.error(f"VAD 检测过程中发生错误: {e}")
             return False