feat: selected realm stored in browser's local storage

WotBlitzStatisticsPro.Blazor/Model/UserSettings.cs

@@ -1,9 +1,13 @@
-namespace WotBlitzStatisticsPro.Blazor.Model
+using WotBlitzStatisticsPro.Blazor.GraphQl;
+
+namespace WotBlitzStatisticsPro.Blazor.Model
 {
     public class UserSettings
     {
         public const string UserSettingsLocalStorageKey = "user-settings";
 
         public string Culture { get; set; } = "en-US";
+
+        public RealmType RealmType { get; set; } = RealmType.Eu;
     }
 }