Update app.py (#14)

- Update app.py (f5cd4f86625bd037966c3b8266a6dda3b88d8429)


Co-authored-by: Manay Porwal <manayporwal07@users.noreply.huggingface.co>

app.py

@@ -329,10 +329,15 @@ with gr.Blocks() as demo:
 
     def on_run(file_in):
         (gallery_items, captions), metrics_df, lb = run_evaluation(file_in)
-        gallery_display = [(p, captions[i] if i < len(captions) else "") for i, p in enumerate(gallery_items)]
-        return gallery_display, metrics_df, lb
-
-    run_btn.click(fn=on_run, inputs=[file_input], outputs=[gallery, table, leaderboard])
+        gallery_display = [(p, captions[i] if i < len(captions) else "") for i, p in enumerate(gallery_items)] if gallery_items else []
+        csv_path = "/tmp/eval_results.csv"  # ensure CSV report is downloadable
+        return gallery_display, metrics_df, lb, csv_path
+
+    run_btn.click(
+        fn=on_run,
+        inputs=[file_input],
+        outputs=[gallery, table, leaderboard, download_report]
+        )
 
     gr.Markdown("## Tips\n- Ensure columns: `task_id,prompt,response,agent,reference` "
                 "(case-insensitive).\n- Visualization images in Gallery.\n- Download CSV after evaluation.")