revert: Leaderboard.value requires a DataFrame at construction

app.py

@@ -80,7 +80,7 @@ def gradio_interface() -> gr.Blocks:
         with gr.Tabs(elem_classes="tab-buttons"):
             with gr.TabItem("🛰️ Tracker"):
                 Leaderboard(
-                    value=load_results_df,
+                    value=load_results_df(),
                     datatype=["date", "str", "html", "number", "number", "html"],
                     select_columns=["submission time", "problem type", "user", "score", "bundle size", "bundle"],
                     search_columns=["submission time", "score", "user", "problem type"],