fix: some errors w AdminSubscribeRequest

LibraryManagement.Shared/Models/LibraryDtos.cs

@@ -138,6 +138,8 @@ namespace LibraryManagement.Shared.Models
         public int MembershipId { get; set; }
     }
 
+    public class AdminSubscribeRequest
+    {
         public Guid UserId { get; set; }
         public int MembershipId { get; set; }
     }
@@ -151,7 +153,6 @@ namespace LibraryManagement.Shared.Models
         public bool CanUpgrade { get; set; }
     }
 
-
     // Loyalty DTOs
     public class LoyaltyAccountDto
     {
@@ -265,7 +266,6 @@ namespace LibraryManagement.Shared.Models
         public string? Description { get; set; }
     }
 
-
     public class UserCreateRequest
     {
         public string FullName { get; set; } = string.Empty;