Additional card content

SVSim.Database/Models/CardCosmeticReward.cs

@@ -0,0 +1,24 @@
+using SVSim.Database.Enums;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// Association: when a viewer acquires <see cref="CardId"/>, they should also receive
+/// the cosmetic identified by (<see cref="Type"/>, <see cref="CosmeticId"/>) if they don't
+/// already own it.
+///
+/// Always recorded on the NON-FOIL row of a card. Foil twins (card_id + 1) inherit at
+/// lookup time — see CardAcquisitionService for the foil-resolution rule.
+///
+/// Composite PK on (CardId, Type, CosmeticId): naturally enforces "no duplicates" AND
+/// satisfies EF's deterministic-PK requirement for HasData seeding.
+/// </summary>
+public class CardCosmeticReward
+{
+    public long CardId { get; set; }
+    public CosmeticType Type { get; set; }
+    public long CosmeticId { get; set; }
+    public int Quantity { get; set; } = 1;
+
+    public ShadowverseCardEntry Card { get; set; } = null!;
+}