Fixed many warnings, moved some classes to their own files.

LightlessSync/UI/SyncshellAdminUI.cs

@@ -13,13 +13,13 @@ using LightlessSync.API.Dto.User;
 using LightlessSync.PlayerData.Pairs;
 using LightlessSync.Services;
 using LightlessSync.Services.Mediator;
+using LightlessSync.Services.Profiles;
 using LightlessSync.UI.Handlers;
 using LightlessSync.WebAPI;
 using Microsoft.Extensions.Logging;
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
 using System.Globalization;
-using System.Linq;
 using System.Numerics;
 
 namespace LightlessSync.UI;