fix: user related order issue

Pixiview/Illust/UserIllustPage.xaml.cs

@@ -60,7 +60,7 @@ namespace Pixiview.Illust
                 {
                     return null;
                 }
-                illustIds = init.body.illusts.Keys.OrderByDescending(i => i).ToArray();
+                illustIds = init.body.illusts.Keys.OrderByDescending(i => int.TryParse(i, out int id) ? id : -1).ToArray();
                 App.DebugPrint($"user has ({illustIds.Length}) illusts.");
                 startIndex = 0;
             }