feat: мультироль

backend/UniVerse.Domain/Entities/User.cs

@@ -8,7 +8,6 @@ public class User
     public string Email { get; set; } = string.Empty;
     public string? DisplayName { get; set; }
     public string? AvatarUrl { get; set; }
-    public UserRole Role { get; set; } = UserRole.Student;
     public bool IsActive { get; set; } = true;
     public string? MicrosoftId { get; set; }
     public int Xp { get; set; }
@@ -19,6 +18,7 @@ public class User
     // Navigation properties
     public StudentProfile? StudentProfile { get; set; }
     public TeacherProfile? TeacherProfile { get; set; }
+    public ICollection<UserRoleAssignment> Roles { get; set; } = new List<UserRoleAssignment>();
     public ICollection<LectureEnrollment> Enrollments { get; set; } = new List<LectureEnrollment>();
     public ICollection<Review> Reviews { get; set; } = new List<Review>();
     public ICollection<UserAchievement> UserAchievements { get; set; } = new List<UserAchievement>();