Add Telegram bot integration and enhance user management features

- Introduced Telegram.Bot package for bot functionality.
- Updated user management to include Telegram linking and blocking features.
- Enhanced activation request handling with notifications via Telegram.
- Added new database entities for Telegram link tokens and login requests.
- Implemented traffic synchronization for client stats in the XuiPanelGateway.
- Updated application structure to support new test projects and improved dependency injection for Telegram services.

backend/src/PnvPanel.Application/Activation/RequestActivationCommandHandler.cs

@@ -7,7 +7,8 @@ using PnvPanel.Domain.Activation;
 
 namespace PnvPanel.Application.Activation;
 
-public sealed class RequestActivationCommandHandler(IAppDbContext dbContext, ICurrentUser currentUser)
+public sealed class RequestActivationCommandHandler(
+    IAppDbContext dbContext, IRealtimeNotifier notifier, ITelegramNotifier telegramNotifier, ICurrentUser currentUser)
     : ICommandHandler<RequestActivationCommand, Result<ActivationRequestDto>>
 {
     public async Task<Result<ActivationRequestDto>> Handle(RequestActivationCommand command, CancellationToken cancellationToken)
@@ -24,6 +25,11 @@ public sealed class RequestActivationCommandHandler(IAppDbContext dbContext, ICu
         var request = ActivationRequest.Create(userId, command.Comment);
         dbContext.ActivationRequests.Add(request);
 
+        var userName = currentUser.UserName ?? userId.ToString();
+
+        await notifier.NotifyActivationRequestedAsync(request.Id, userId, userName, request.Comment, request.CreatedAt, cancellationToken);
+        await telegramNotifier.NotifyAdminsActivationRequestedAsync(request.Id, userName, request.Comment, cancellationToken);
+
         return Result.Success(new ActivationRequestDto(request.Id, request.Comment, request.CreatedAt));
     }
 }