fix: 删除3小时前的旧数据错误

修正ProgramData 就数据无法删除问题

Author: LiubeibeiLiu

StickyNotes/App.xaml.cs

@@ -62,7 +62,7 @@ protected override async void OnStartup(StartupEventArgs e)
             // 初始化数据库
             DBInit.InitDB();
             // 删除3小时前的旧数据
-            new ProgramDataService().DeleteByDate(DateTime.Now.AddHours(3));
+            new ProgramDataService().DeleteByDate(DateTime.Now.AddHours(-3));
             var systemtray = SystemTray.Instance;
             var programData = await DataHelper.RestoreDataAsync();
             if (programData == null)