Filling num_params as "Unknown" if N/A

app/backend/data_engine.py

@@ -104,6 +104,10 @@ class DataEngine:
         models_list = self.models
 
         df_model = pd.DataFrame(models_list)
+        
+        # Replace None values in num_params with "Unknown"
+        if 'num_params' in df_model.columns:
+            df_model['num_params'] = df_model['num_params'].fillna("Unknown")
 
         # Create mapping for model names/aliases
         if 'alias' in df_model.columns: