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

backend/UniVerse.Infrastructure/Data/AppDbContext.cs

@@ -23,6 +23,7 @@ public class AppDbContext : DbContext
     public DbSet<Achievement> Achievements { get; set; } = null!;
     public DbSet<UserAchievement> UserAchievements { get; set; } = null!;
     public DbSet<CoinTransaction> CoinTransactions { get; set; } = null!;
+    public DbSet<LevelThreshold> LevelThresholds { get; set; } = null!;
     public DbSet<UserNotification> UserNotifications { get; set; } = null!;
     public DbSet<RefreshToken> RefreshTokens { get; set; } = null!;
 

backend/UniVerse.Infrastructure/Data/Configurations/LevelThresholdConfiguration.cs

@@ -0,0 +1,33 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class LevelThresholdConfiguration : IEntityTypeConfiguration<LevelThreshold>
+{
+    public void Configure(EntityTypeBuilder<LevelThreshold> builder)
+    {
+        builder.ToTable("level_thresholds", table =>
+        {
+            table.HasCheckConstraint("CK_level_thresholds_level_positive", "level > 0");
+            table.HasCheckConstraint("CK_level_thresholds_required_xp_non_negative", "required_xp >= 0");
+        });
+
+        builder.HasKey(t => t.Level);
+        builder.Property(t => t.Level).HasColumnName("level").ValueGeneratedNever();
+        builder.Property(t => t.RequiredXp).HasColumnName("required_xp").IsRequired();
+        builder.HasIndex(t => t.RequiredXp).IsUnique();
+
+        builder.HasData(
+            new LevelThreshold { Level = 1, RequiredXp = 0 },
+            new LevelThreshold { Level = 2, RequiredXp = 100 },
+            new LevelThreshold { Level = 3, RequiredXp = 300 },
+            new LevelThreshold { Level = 4, RequiredXp = 600 },
+            new LevelThreshold { Level = 5, RequiredXp = 1000 },
+            new LevelThreshold { Level = 6, RequiredXp = 1500 },
+            new LevelThreshold { Level = 7, RequiredXp = 2500 },
+            new LevelThreshold { Level = 8, RequiredXp = 4000 }
+        );
+    }
+}