重构

- 统一 ItemDescForm/RewardItem/GoodsItem 的描述格式
- 减少组件属性的 Clone 数量，目前只在合并仓库、组装防御塔时才进行复制
- 删除先前留下的冗余 fallback 代码

Assets/GameMain/Scripts/UI/Shop/UseCase/ShopFormUseCase.cs

@@ -30,7 +30,7 @@ namespace GeometryTD.UI
             return new ShopFormRawData
             {
                 PlayerGold = GameEntry.PlayerInventory != null ? GameEntry.PlayerInventory.Gold : 0,
-                GoodsItems = CloneGoodsItems(_currentGoods)
+                GoodsItems = new List<GoodsItemRawData>(_currentGoods)
             };
         }
 
@@ -93,59 +93,5 @@ namespace GeometryTD.UI
             return inventory;
         }
 
-        private static List<GoodsItemRawData> CloneGoodsItems(List<GoodsItemRawData> source)
-        {
-            List<GoodsItemRawData> result = new List<GoodsItemRawData>(source?.Count ?? 0);
-            if (source == null)
-            {
-                return result;
-            }
-
-            foreach (var item in source)
-            {
-                if (item == null)
-                {
-                    continue;
-                }
-
-                result.Add(new GoodsItemRawData
-                {
-                    GoodsIndex = item.GoodsIndex,
-                    Title = item.Title,
-                    TypeText = item.TypeText,
-                    Description = item.Description,
-                    Price = item.Price,
-                    Tags = item.Tags != null ? (TagType[])item.Tags.Clone() : Array.Empty<TagType>(),
-                    IconAreaContext = item.IconAreaContext == null
-                        ? null
-                        : new IconAreaContext
-                        {
-                            Rarity = item.IconAreaContext.Rarity,
-                            ComponentSlotType = item.IconAreaContext.ComponentSlotType,
-                            Color = item.IconAreaContext.Color,
-                            Icon = item.IconAreaContext.Icon
-                        },
-                    SourceItem = CloneSourceItem(item.SourceItem),
-                    IsPurchased = item.IsPurchased
-                });
-            }
-
-            return result;
-        }
-
-        private static TowerCompItemData CloneSourceItem(TowerCompItemData item)
-        {
-            switch (item)
-            {
-                case MuzzleCompItemData muzzleComp:
-                    return InventoryCloneUtility.CloneMuzzleComp(muzzleComp);
-                case BearingCompItemData bearingComp:
-                    return InventoryCloneUtility.CloneBearingComp(bearingComp);
-                case BaseCompItemData baseComp:
-                    return InventoryCloneUtility.CloneBaseComp(baseComp);
-                default:
-                    return null;
-            }
-        }
     }
 }