feat: Update appVersion to 2023.03.21 and enhance avatar-item linkage in store service

DorkNet.Server/Services/StoreService.cs

@@ -968,6 +968,15 @@ public class StoreService(DorkNetDbContext db, LevelService level, IConfiguratio
             Tooltip                   = i.Description,
             AvatarItemDesc            = avatarItemDesc,
             AvatarItemDescOrHairDyeDesc = avatarItemDesc,
+            // AvatarItemId is the field the 2023 client's StoreItemListModel
+            // actually reads (store-item +0x38) to resolve the card to a baked
+            // AvatarItem and read its OutfitType for tab placement — verified
+            // vs 2023 ISIL (EMBCEDNHFLB/CLIANCNHNIE, AvatarItem.GIJPCPDKHPO).
+            // AvatarItemDesc alone is NOT the join key, so clothing cards
+            // resolved to OutfitType=-1 and the Shop rendered empty. Ship the
+            // same {guid},,, descriptor (GIJPCPDKHPO accepts bare {guid} or the
+            // composite and falls back to parsing it to the immutable Guid).
+            AvatarItemId              = avatarItemDesc,
             AvatarItemType            = string.IsNullOrEmpty(avatarItemDesc) ? (int?)null : avatarItemType,
             ConsumableItemDesc        = consumableItemDesc,
             EquipmentPrefabName       = equipmentPrefabName,