feat(leader-skin): shop catalog + 5 endpoints (/products, /buy, /buy_set, /buy_set_item, /ids)

Schema: LeaderSkinShopSeries -> Products (owned rewards) + owned
SetCompletionRewards on the series; ViewerLeaderSkinSetClaim composite
PK (ViewerId, SeriesId) backs the /buy_set_item idempotent-claim check.

Importer mirrors SleeveShopImporter: idempotent find-or-create, owned
collections rewritten wholesale on rerun. 16 series, 104 products.

Controller (extends existing /set with 5 new endpoints):
- /products: dict-keyed-by-series_id-string wire shape. is_completed
  per-viewer, rewards.status from ViewerLeaderSkinSetClaim (0=no set
  sale, 1=available, 2=claimed) matching client RewardStatus enum.
- /buy: single skin, sales_type 1/2 dispatch, 3=>501.
- /buy_set: whole series at SetPrice; requires set_sales_status != 0;
  grants every product's rewards (RewardGrantService idempotent on
  already-owned cosmetics, so partial-set buys don't double-add).
- /buy_set_item: requires viewer owns every skin in series; idempotent
  on re-claim (returns 200 + empty reward_list, not 400) so client
  retries don't error.
- /ids: flat owned-skin-id list for badge refresh.

496 tests pass (was 486; +10 leader-skin-shop tests).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.Database/Migrations/20260528024430_AddLeaderSkinShop.cs

@@ -0,0 +1,155 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace SVSim.Database.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddLeaderSkinShop : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "LeaderSkinShopSeries",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false),
+                    IsNew = table.Column<bool>(type: "boolean", nullable: false),
+                    IsEnabled = table.Column<bool>(type: "boolean", nullable: false),
+                    SetSalesStatus = table.Column<int>(type: "integer", nullable: false),
+                    SetPriceCrystal = table.Column<int>(type: "integer", nullable: true),
+                    SetPriceRupy = table.Column<int>(type: "integer", nullable: true),
+                    SetPriceTicket = table.Column<int>(type: "integer", nullable: true),
+                    SetPriceTicketId = table.Column<long>(type: "bigint", nullable: true),
+                    SetCompletionRewardStatus = table.Column<int>(type: "integer", nullable: false),
+                    DateCreated = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    DateUpdated = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_LeaderSkinShopSeries", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ViewerLeaderSkinSetClaims",
+                columns: table => new
+                {
+                    ViewerId = table.Column<long>(type: "bigint", nullable: false),
+                    SeriesId = table.Column<int>(type: "integer", nullable: false),
+                    ClaimedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ViewerLeaderSkinSetClaims", x => new { x.ViewerId, x.SeriesId });
+                });
+
+            migrationBuilder.CreateTable(
+                name: "LeaderSkinShopProducts",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false),
+                    SeriesId = table.Column<int>(type: "integer", nullable: false),
+                    LeaderSkinId = table.Column<int>(type: "integer", nullable: false),
+                    ProductNameKey = table.Column<string>(type: "text", nullable: false),
+                    IntroductionKey = table.Column<string>(type: "text", nullable: false),
+                    CvNameKey = table.Column<string>(type: "text", nullable: false),
+                    SinglePriceCrystal = table.Column<int>(type: "integer", nullable: true),
+                    SinglePriceRupy = table.Column<int>(type: "integer", nullable: true),
+                    SinglePriceTicket = table.Column<int>(type: "integer", nullable: true),
+                    TicketNumber = table.Column<int>(type: "integer", nullable: true),
+                    TicketItemId = table.Column<long>(type: "bigint", nullable: true),
+                    IsEnabled = table.Column<bool>(type: "boolean", nullable: false),
+                    DateCreated = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    DateUpdated = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_LeaderSkinShopProducts", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_LeaderSkinShopProducts_LeaderSkinShopSeries_SeriesId",
+                        column: x => x.SeriesId,
+                        principalTable: "LeaderSkinShopSeries",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "LeaderSkinShopSeriesRewardEntry",
+                columns: table => new
+                {
+                    LeaderSkinShopSeriesEntryId = table.Column<int>(type: "integer", nullable: false),
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    OrderIndex = table.Column<int>(type: "integer", nullable: false),
+                    RewardType = table.Column<int>(type: "integer", nullable: false),
+                    RewardDetailId = table.Column<long>(type: "bigint", nullable: false),
+                    RewardNumber = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_LeaderSkinShopSeriesRewardEntry", x => new { x.LeaderSkinShopSeriesEntryId, x.Id });
+                    table.ForeignKey(
+                        name: "FK_LeaderSkinShopSeriesRewardEntry_LeaderSkinShopSeries_Leader~",
+                        column: x => x.LeaderSkinShopSeriesEntryId,
+                        principalTable: "LeaderSkinShopSeries",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "LeaderSkinShopProductRewardEntry",
+                columns: table => new
+                {
+                    LeaderSkinShopProductEntryId = table.Column<int>(type: "integer", nullable: false),
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    OrderIndex = table.Column<int>(type: "integer", nullable: false),
+                    RewardType = table.Column<int>(type: "integer", nullable: false),
+                    RewardDetailId = table.Column<long>(type: "bigint", nullable: false),
+                    RewardNumber = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_LeaderSkinShopProductRewardEntry", x => new { x.LeaderSkinShopProductEntryId, x.Id });
+                    table.ForeignKey(
+                        name: "FK_LeaderSkinShopProductRewardEntry_LeaderSkinShopProducts_Lea~",
+                        column: x => x.LeaderSkinShopProductEntryId,
+                        principalTable: "LeaderSkinShopProducts",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_LeaderSkinShopProducts_SeriesId",
+                table: "LeaderSkinShopProducts",
+                column: "SeriesId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ViewerLeaderSkinSetClaims_ViewerId",
+                table: "ViewerLeaderSkinSetClaims",
+                column: "ViewerId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "LeaderSkinShopProductRewardEntry");
+
+            migrationBuilder.DropTable(
+                name: "LeaderSkinShopSeriesRewardEntry");
+
+            migrationBuilder.DropTable(
+                name: "ViewerLeaderSkinSetClaims");
+
+            migrationBuilder.DropTable(
+                name: "LeaderSkinShopProducts");
+
+            migrationBuilder.DropTable(
+                name: "LeaderSkinShopSeries");
+        }
+    }
+}

SVSim.Database/Migrations/SVSimDbContextModelSnapshot.cs

@@ -1182,6 +1182,100 @@ namespace SVSim.Database.Migrations
                     b.ToTable("LeaderSkins");
                 });
 
+            modelBuilder.Entity("SVSim.Database.Models.LeaderSkinShopProductEntry", b =>
+                {
+                    b.Property<int>("Id")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CvNameKey")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("DateCreated")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("DateUpdated")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("IntroductionKey")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<int>("LeaderSkinId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("ProductNameKey")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("SinglePriceCrystal")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("SinglePriceRupy")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("SinglePriceTicket")
+                        .HasColumnType("integer");
+
+                    b.Property<long?>("TicketItemId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int?>("TicketNumber")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SeriesId");
+
+                    b.ToTable("LeaderSkinShopProducts");
+                });
+
+            modelBuilder.Entity("SVSim.Database.Models.LeaderSkinShopSeriesEntry", b =>
+                {
+                    b.Property<int>("Id")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("DateCreated")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("DateUpdated")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<bool>("IsEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("IsNew")
+                        .HasColumnType("boolean");
+
+                    b.Property<int>("SetCompletionRewardStatus")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("SetPriceCrystal")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("SetPriceRupy")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("SetPriceTicket")
+                        .HasColumnType("integer");
+
+                    b.Property<long?>("SetPriceTicketId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("SetSalesStatus")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("LeaderSkinShopSeries");
+                });
+
             modelBuilder.Entity("SVSim.Database.Models.LoadingExclusionCardEntry", b =>
                 {
                     b.Property<long>("Id")
@@ -2300,6 +2394,24 @@ namespace SVSim.Database.Migrations
                     b.ToTable("ViewerEventCounters");
                 });
 
+            modelBuilder.Entity("SVSim.Database.Models.ViewerLeaderSkinSetClaim", b =>
+                {
+                    b.Property<long>("ViewerId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("ClaimedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("ViewerId", "SeriesId");
+
+                    b.HasIndex("ViewerId");
+
+                    b.ToTable("ViewerLeaderSkinSetClaims");
+                });
+
             modelBuilder.Entity("SVSim.Database.Models.ViewerMission", b =>
                 {
                     b.Property<long>("Id")
@@ -2714,6 +2826,86 @@ namespace SVSim.Database.Migrations
                     b.Navigation("Class");
                 });
 
+            modelBuilder.Entity("SVSim.Database.Models.LeaderSkinShopProductEntry", b =>
+                {
+                    b.HasOne("SVSim.Database.Models.LeaderSkinShopSeriesEntry", "Series")
+                        .WithMany("Products")
+                        .HasForeignKey("SeriesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.OwnsMany("SVSim.Database.Models.LeaderSkinShopProductRewardEntry", "Rewards", b1 =>
+                        {
+                            b1.Property<int>("LeaderSkinShopProductEntryId")
+                                .HasColumnType("integer");
+
+                            b1.Property<int>("Id")
+                                .ValueGeneratedOnAdd()
+                                .HasColumnType("integer");
+
+                            NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b1.Property<int>("Id"));
+
+                            b1.Property<int>("OrderIndex")
+                                .HasColumnType("integer");
+
+                            b1.Property<long>("RewardDetailId")
+                                .HasColumnType("bigint");
+
+                            b1.Property<int>("RewardNumber")
+                                .HasColumnType("integer");
+
+                            b1.Property<int>("RewardType")
+                                .HasColumnType("integer");
+
+                            b1.HasKey("LeaderSkinShopProductEntryId", "Id");
+
+                            b1.ToTable("LeaderSkinShopProductRewardEntry");
+
+                            b1.WithOwner()
+                                .HasForeignKey("LeaderSkinShopProductEntryId");
+                        });
+
+                    b.Navigation("Rewards");
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("SVSim.Database.Models.LeaderSkinShopSeriesEntry", b =>
+                {
+                    b.OwnsMany("SVSim.Database.Models.LeaderSkinShopSeriesRewardEntry", "SetCompletionRewards", b1 =>
+                        {
+                            b1.Property<int>("LeaderSkinShopSeriesEntryId")
+                                .HasColumnType("integer");
+
+                            b1.Property<int>("Id")
+                                .ValueGeneratedOnAdd()
+                                .HasColumnType("integer");
+
+                            NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b1.Property<int>("Id"));
+
+                            b1.Property<int>("OrderIndex")
+                                .HasColumnType("integer");
+
+                            b1.Property<long>("RewardDetailId")
+                                .HasColumnType("bigint");
+
+                            b1.Property<int>("RewardNumber")
+                                .HasColumnType("integer");
+
+                            b1.Property<int>("RewardType")
+                                .HasColumnType("integer");
+
+                            b1.HasKey("LeaderSkinShopSeriesEntryId", "Id");
+
+                            b1.ToTable("LeaderSkinShopSeriesRewardEntry");
+
+                            b1.WithOwner()
+                                .HasForeignKey("LeaderSkinShopSeriesEntryId");
+                        });
+
+                    b.Navigation("SetCompletionRewards");
+                });
+
             modelBuilder.Entity("SVSim.Database.Models.PackConfigEntry", b =>
                 {
                     b.OwnsMany("SVSim.Database.Models.PackBannerEntry", "Banners", b1 =>
@@ -3396,6 +3588,11 @@ namespace SVSim.Database.Migrations
                     b.Navigation("LeaderSkins");
                 });
 
+            modelBuilder.Entity("SVSim.Database.Models.LeaderSkinShopSeriesEntry", b =>
+                {
+                    b.Navigation("Products");
+                });
+
             modelBuilder.Entity("SVSim.Database.Models.PuzzleGroupEntry", b =>
                 {
                     b.Navigation("Puzzles");

SVSim.Database/Models/LeaderSkinShopProductEntry.cs

@@ -0,0 +1,36 @@
+using SVSim.Database.Common;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// One purchasable leader-skin product. PK = wire product_id (small ints in captures — e.g. 31,
+/// 165, 166). FK <see cref="SeriesId"/>. <see cref="LeaderSkinId"/> points at the
+/// <see cref="LeaderSkinEntry"/> the buyer ends up owning.
+/// </summary>
+public class LeaderSkinShopProductEntry : BaseEntity<int>
+{
+    public int SeriesId { get; set; }
+    public int LeaderSkinId { get; set; }
+
+    /// <summary>SystemText keys — resolved client-side via Data.Master.GetLeaderSkinProductText.</summary>
+    public string ProductNameKey { get; set; } = string.Empty;
+    public string IntroductionKey { get; set; } = string.Empty;
+    public string CvNameKey { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Per-product price for solo buy. Captures consistently show crystal/rupy parity for
+    /// regular skins (500c / 500r single, 400 unit-price when bought as set). Nullable so
+    /// promotions can offer one currency without the other.
+    /// </summary>
+    public int? SinglePriceCrystal { get; set; }
+    public int? SinglePriceRupy { get; set; }
+    public int? SinglePriceTicket { get; set; }
+    public int? TicketNumber { get; set; }
+    public long? TicketItemId { get; set; }
+
+    public bool IsEnabled { get; set; }
+
+    public List<LeaderSkinShopProductRewardEntry> Rewards { get; set; } = new();
+
+    public LeaderSkinShopSeriesEntry? Series { get; set; }
+}

SVSim.Database/Models/LeaderSkinShopProductRewardEntry.cs

@@ -0,0 +1,17 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// One per-buy reward attached to a leader-skin product. Owned by
+/// <see cref="LeaderSkinShopProductEntry"/>. Captures show each skin product bundles 3 rewards:
+/// the skin itself (type=10), the matching emblem (type=7), and the matching sleeve (type=6).
+/// </summary>
+[Owned]
+public class LeaderSkinShopProductRewardEntry
+{
+    public int OrderIndex { get; set; }
+    public int RewardType { get; set; }   // Wizard.UserGoods.Type
+    public long RewardDetailId { get; set; }
+    public int RewardNumber { get; set; }
+}

SVSim.Database/Models/LeaderSkinShopSeriesEntry.cs

@@ -0,0 +1,33 @@
+using SVSim.Database.Common;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// One leader-skin-shop series (a themed collection — e.g. "7th Anniversary Skins").
+/// PK = wire series_id. <see cref="SetSalesStatus"/> controls whether the per-series
+/// "buy whole set" UI is offered: 0=none (single-skin purchases only), non-zero=set sale active.
+/// When set-active, the set-price + set-completion-reward fields are populated.
+/// </summary>
+public class LeaderSkinShopSeriesEntry : BaseEntity<int>
+{
+    public bool IsNew { get; set; }
+    public bool IsEnabled { get; set; }
+
+    /// <summary>SkinSeriesPurchaseInfo.eSetSalesStatus — 0=None.</summary>
+    public int SetSalesStatus { get; set; }
+
+    public int? SetPriceCrystal { get; set; }
+    public int? SetPriceRupy { get; set; }
+    public int? SetPriceTicket { get; set; }
+    public long? SetPriceTicketId { get; set; }
+
+    /// <summary>
+    /// SkinSeriesPurchaseInfo.RewardStatus — 0=none. The per-VIEWER claim state is computed
+    /// at request time from <see cref="ViewerLeaderSkinSetClaim"/>; this column is the catalog
+    /// default surfaced when no viewer is in context (or when set_sales_status==0).
+    /// </summary>
+    public int SetCompletionRewardStatus { get; set; }
+
+    public List<LeaderSkinShopProductEntry> Products { get; set; } = new();
+    public List<LeaderSkinShopSeriesRewardEntry> SetCompletionRewards { get; set; } = new();
+}

SVSim.Database/Models/LeaderSkinShopSeriesRewardEntry.cs

@@ -0,0 +1,18 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// One set-completion bonus item attached to a leader-skin series. Owned by
+/// <see cref="LeaderSkinShopSeriesEntry"/>. Granted by /leader_skin/buy_set_item once the
+/// viewer owns every skin in the series. Wire shape: entries inside
+/// <c>rewards.items[]</c> on the per-series block of /leader_skin/products.
+/// </summary>
+[Owned]
+public class LeaderSkinShopSeriesRewardEntry
+{
+    public int OrderIndex { get; set; }
+    public int RewardType { get; set; }
+    public long RewardDetailId { get; set; }
+    public int RewardNumber { get; set; }
+}

SVSim.Database/Models/ViewerLeaderSkinSetClaim.cs

@@ -0,0 +1,14 @@
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// One row per (viewer, leader-skin series) marking that the viewer has claimed the
+/// series-completion bonus via /leader_skin/buy_set_item. Composite PK (ViewerId, SeriesId).
+/// Standalone table (not a Viewer owned collection) to avoid the cartesian-explode pitfall
+/// when loading the viewer graph — claim state is checked per-series, not per-viewer-load.
+/// </summary>
+public class ViewerLeaderSkinSetClaim
+{
+    public long ViewerId { get; set; }
+    public int SeriesId { get; set; }
+    public DateTime ClaimedAt { get; set; }
+}

SVSim.Database/SVSimDbContext.cs

@@ -73,6 +73,9 @@ public class SVSimDbContext : DbContext
     public DbSet<SleeveShopSeriesEntry> SleeveShopSeries => Set<SleeveShopSeriesEntry>();
     public DbSet<SleeveShopProductEntry> SleeveShopProducts => Set<SleeveShopProductEntry>();
     public DbSet<ItemPurchaseCatalogEntry> ItemPurchaseCatalog => Set<ItemPurchaseCatalogEntry>();
+    public DbSet<LeaderSkinShopSeriesEntry> LeaderSkinShopSeries => Set<LeaderSkinShopSeriesEntry>();
+    public DbSet<LeaderSkinShopProductEntry> LeaderSkinShopProducts => Set<LeaderSkinShopProductEntry>();
+    public DbSet<ViewerLeaderSkinSetClaim> ViewerLeaderSkinSetClaims => Set<ViewerLeaderSkinSetClaim>();
     public DbSet<MaintenanceCardEntry> MaintenanceCards => Set<MaintenanceCardEntry>();
     public DbSet<FeatureMaintenanceEntry> FeatureMaintenances => Set<FeatureMaintenanceEntry>();
     public DbSet<PreReleaseInfo> PreReleaseInfos => Set<PreReleaseInfo>();
@@ -191,6 +194,21 @@ public class SVSimDbContext : DbContext
             .OnDelete(DeleteBehavior.Cascade);
         modelBuilder.Entity<SleeveShopProductEntry>().HasIndex(p => p.SeriesId);
 
+        modelBuilder.Entity<LeaderSkinShopSeriesEntry>().OwnsMany(s => s.SetCompletionRewards);
+        modelBuilder.Entity<LeaderSkinShopProductEntry>().OwnsMany(p => p.Rewards);
+        modelBuilder.Entity<LeaderSkinShopProductEntry>()
+            .HasOne(p => p.Series)
+            .WithMany(s => s.Products)
+            .HasForeignKey(p => p.SeriesId)
+            .OnDelete(DeleteBehavior.Cascade);
+        modelBuilder.Entity<LeaderSkinShopProductEntry>().HasIndex(p => p.SeriesId);
+
+        modelBuilder.Entity<ViewerLeaderSkinSetClaim>(b =>
+        {
+            b.HasKey(c => new { c.ViewerId, c.SeriesId });
+            b.HasIndex(c => c.ViewerId);
+        });
+
         modelBuilder.Entity<CardCosmeticReward>(b =>
         {
             b.HasKey(r => new { r.CardId, r.Type, r.CosmeticId });