Use gr.File for JSON API to fix file path handling

app.py

@@ -432,10 +432,10 @@ with gr.Blocks(css=custom_css, title="Pro-TeVA Tone Recognition") as demo:
                 show_label=True
             )
 
-    # JSON API interface
+    # JSON API interface - use gr.File to properly handle file paths from API
     json_api = gr.Interface(
         fn=predict_tone_json,
-        inputs=gr.Audio(type="filepath", label="Audio File"),
+        inputs=gr.File(label="Audio File", file_types=["audio"]),
         outputs=gr.JSON(label="Prediction Result"),
         api_name="predict_json",
         title="Pro-TeVA JSON API",