fix: перенёс уровни в бд и пофиксид их отображение на фронте

backend/UniVerse.Infrastructure/Services/UserService.cs

@@ -26,7 +26,7 @@ public class UserService : IUserService
             .Include(u => u.Roles)
             .FirstOrDefaultAsync(u => u.Id == id)
             ?? throw new NotFoundException("User", id);
-        return user.ToDto(_gamification.CalculateLevel(user.Xp));
+        return user.ToDto(await _gamification.CalculateLevelAsync(user.Xp));
     }
 
     public async Task<UserDto> UpdateProfileAsync(int id, UpdateUserRequest request)
@@ -42,7 +42,7 @@ public class UserService : IUserService
 
         await _db.SaveChangesAsync();
         await _gamification.CheckAndAwardAchievementsAsync(id);
-        return user.ToDto(_gamification.CalculateLevel(user.Xp));
+        return user.ToDto(await _gamification.CalculateLevelAsync(user.Xp));
     }
 
     public async Task<UserStatsDto> GetStatsAsync(int id)
@@ -55,9 +55,13 @@ public class UserService : IUserService
         var reviews = await _db.Reviews.CountAsync(r => r.UserId == id);
         var achievements = await _db.UserAchievements.CountAsync(ua => ua.UserId == id);
 
+        var level = await _gamification.CalculateLevelAsync(user.Xp);
+        var levelProgress = await _gamification.GetLevelProgressAsync(user.Xp);
+
         return new UserStatsDto(
             totalLectures, attended, reviews,
-            user.Xp, user.Coins, _gamification.CalculateLevel(user.Xp), achievements
+            user.Xp, user.Coins, level, achievements,
+            levelProgress.CurrentLevelXp, levelProgress.NextLevelXp
         );
     }
 
@@ -94,7 +98,10 @@ public class UserService : IUserService
             .Take(filter.PageSize)
             .ToListAsync();
 
-        var items = users.Select(u => u.ToDto(_gamification.CalculateLevel(u.Xp))).ToList();
+        var items = new List<UserDto>(users.Count);
+        foreach (var user in users)
+            items.Add(user.ToDto(await _gamification.CalculateLevelAsync(user.Xp)));
+
         return PagedResult<UserDto>.Create(items, total, filter.Page, filter.PageSize);
     }