make global leaderboard data refresh on tab switch and vote submission

app.py

@@ -435,6 +435,10 @@ The Elo rating system provides a more accurate ranking than simple win rates:
             fn=handle_new_example_click,
             inputs=[],
             outputs=[current_example]
+        ).then(
+            fn=load_leaderboard_data,  # Add this to refresh results_agg
+            inputs=[],
+            outputs=[results_agg]
         ).then(
             fn=update_ui_for_new_context,
             inputs=[current_example],
@@ -482,6 +486,10 @@ The Elo rating system provides a more accurate ranking than simple win rates:
         inputs=[],
         outputs=[results_table_display],
         api_name="refresh_leaderboard"
+    ).then(
+        fn=load_leaderboard_data,
+        inputs=[],
+        outputs=[results_agg]
     )
     
     demo.unload(cleanup_on_disconnect)