Добавил слой Application

backend/UniVerse.Application/Interfaces/IGamificationService.cs

@@ -0,0 +1,16 @@
+using UniVerse.Application.DTOs.Achievements;
+using UniVerse.Application.DTOs.Common;
+using UniVerse.Application.DTOs.Gamification;
+using UniVerse.Domain.Enums;
+
+namespace UniVerse.Application.Interfaces;
+
+public interface IGamificationService
+{
+    Task AwardCoinsAsync(int userId, int amount, CoinTransactionType type,
+        int? reviewId = null, int? achievementId = null, string? description = null);
+    Task CheckAndAwardAchievementsAsync(int userId);
+    int CalculateLevel(int xp);
+    Task<List<UserAchievementDto>> GetUserAchievementsAsync(int userId);
+    Task<PagedResult<CoinTransactionDto>> GetTransactionsAsync(int userId, PaginationRequest pagination);
+}