Update app.py

app.py

@@ -139,6 +139,7 @@ app_ui = ui.page_sidebar(
         
         # Row for the action button to generate plot
         ui.row(ui.input_action_button("generate_plot", "Generate Plot", class_="btn-primary")),
+        width="400px"  # Added this parameter to control sidebar width
     ),
             
     # Main content area with tabs (placed directly in page_sidebar)