feat(motion_app): implement asynchronous similarity calculation

audio_player.py

@@ -91,6 +91,8 @@ class AudioPlayer:
         """Restarts the audio from the beginning."""
         if self.pygame_initialized and self.audio_file:
             self.stop()
+            # Small delay to ensure proper stopping
+            time.sleep(0.1)
             return self.play()
         return False