Move thread start to main

app.py

@@ -77,17 +77,12 @@ def background_refresh():
                 )
 
                 cached_fetch(get_gpus_for_leaderboard, lb_name, force_refresh=True)
-
             cached_fetch(get_leaderboard_names, force_refresh=True)
 
         except Exception as e:
             print(f"Background refresh error: {e}")
 
 
-background_thread = threading.Thread(target=background_refresh, daemon=True)
-background_thread.start()
-
-
 def create_table_for_lb(lb_data):
     headers = [
         "Rank",
@@ -397,6 +392,8 @@ def build_ui():
 
 if __name__ == "__main__":
     try:
+        background_thread = threading.Thread(target=background_refresh, daemon=True)
+        background_thread.start()
         app = build_ui()
         app.launch()
     finally: