debug app

backend/app.py

@@ -244,6 +244,7 @@ def get_chart(config, df):
         "attacks_with_variations": config["attacks_with_variations"],
         "all_attacks_df": df.to_dict(orient="records"),
     }
+    print(f"Chart data prepared with {len(df)} rows, columns: {df.columns.tolist()}")
 
     return Response(json.dumps(chart_data), mimetype="application/json")