Add process check before terminating audio playback in play_audio function

src/audio.py

@@ -61,6 +61,7 @@ def play_audio(file_path: str, loop: bool = False) -> Callable[[], None]:
             )
     
     def stop():
+        if process.poll() is None:  # Check if the process is still running
             process.terminate()
     
     return stop