feat: добавил каталог достижений и автоначисление

Реализовал автосоздание и обновление каталога достижений на бэке и синхронизацию на фронте.

backend/UniVerse.Infrastructure/Services/LectureService.cs

@@ -12,7 +12,13 @@ namespace UniVerse.Infrastructure.Services;
 public class LectureService : ILectureService
 {
     private readonly AppDbContext _db;
-    public LectureService(AppDbContext db) => _db = db;
+    private readonly IGamificationService _gamification;
+
+    public LectureService(AppDbContext db, IGamificationService gamification)
+    {
+        _db = db;
+        _gamification = gamification;
+    }
 
     private IQueryable<Lecture> BaseQuery() => _db.Lectures
         .Include(l => l.Course).Include(l => l.Teacher)
@@ -96,6 +102,7 @@ public class LectureService : ILectureService
             throw new ConflictException("Already enrolled.");
         _db.LectureEnrollments.Add(new LectureEnrollment { LectureId = lectureId, UserId = userId });
         await _db.SaveChangesAsync();
+        await _gamification.CheckAndAwardAchievementsAsync(userId);
     }
 
     public async Task UnenrollAsync(int lectureId, int userId)
@@ -114,6 +121,8 @@ public class LectureService : ILectureService
             ?? throw new NotFoundException("Enrollment not found.");
         enrollment.Attended = attended;
         await _db.SaveChangesAsync();
+        if (attended)
+            await _gamification.CheckAndAwardAchievementsAsync(userId);
     }
 
     public async Task<PagedResult<EnrollmentDto>> GetEnrollmentsAsync(int lectureId, PaginationRequest pagination)