[Fix] sorting of selected models

app.py

@@ -13,7 +13,8 @@ def create_heatmap(selected_models, selected_dataset, selected_metric):
     if not selected_models or not selected_dataset:
         return None
     
-    selected_models = selected_models.sort()
+    # Sort models and get short names
+    selected_models = sorted(selected_models)
     selected_models_short = [model.split("/")[-1] for model in selected_models]
     
     # Generate random similarity matrix