Fix UI score formatting: do not coerce NaN to 0; rely on format_score_column to show 'Not Submitted'.\n\nCo-authored-by: openhands <openhands@all-hands.dev>

ui_components.py

@@ -386,7 +386,7 @@ def create_leaderboard_display(
         if "Cost" in col:
             df_view = format_cost_column(df_view, col)
 
-    # Fill NaN scores with 0
+    # Apply score formatting without coercing NaN to 0
     for col in df_view.columns:
         if "Score" in col:
             df_view = format_score_column(df_view, col)