feat: wait for audio to be uploaded

app.py

@@ -15,6 +15,11 @@ def read_file_as_base64(file_path: str) -> str:
 def transcribe_audio(audio: str) -> str:
     print(f"{audio=}")
 
+    if audio is None:
+        raise gr.Error(
+            "Please wait a moment for the audio to be uploaded, then click the button again."
+        )
+
     b64 = read_file_as_base64(audio)
     url = f"https://api-inference.huggingface.co/models/{model_id}"
     headers = {