Update app.py

app.py

@@ -35,7 +35,7 @@ def save_activity(activity):
 def update_activity_display(show_all=False):
     data = load_data()
     if not data:
-        return pd.DataFrame(columns=["#(行號)", "活動", "時間"])
+        return pd.DataFrame(columns=["No.", "活動", "時間"])
     
     # 添加索引列
     df = pd.DataFrame(data)