仓库组件 + 防御塔升级

- `PlayerInventoryComponent`：玩家库存组件，收集金币/组件/防御塔等道具
- 补全防御塔的升级逻辑，最高 5 级

Assets/GameMain/Scripts/UI/Combat/UseCase/CombatFinishFormUseCase.cs

@@ -6,7 +6,6 @@ namespace GeometryTD.UI
 {
     public class CombatFinishFormUseCase : IUIUseCase
     {
-        private readonly RepoFormUseCase _repoFormUseCase = new RepoFormUseCase();
         private CombatScheduler _combatScheduler;
         private int _defeatedEnemyCount;
         private int _gainedGold;
@@ -57,8 +56,7 @@ namespace GeometryTD.UI
             BackpackInventoryData rewardInventory = _rewardInventory;
             if (rewardInventory == null)
             {
-                RepoFormRawData repoRawData = _repoFormUseCase.CreateInitialModel();
-                rewardInventory = repoRawData != null ? repoRawData.Inventory : null;
+                rewardInventory = RepoFormUseCase.SampleInventory();
             }
 
             return new CombatFinishFormRawData

Assets/GameMain/Scripts/UI/Combat/UseCase/CombatSelectFormUseCase.cs

@@ -134,6 +134,11 @@ namespace GeometryTD.UI
             _upgradeOption.Price = Mathf.Max(0, cost);
         }
 
+        public void SetUpgradeVisible(bool visible)
+        {
+            _upgradeOption.IsVisible = visible;
+        }
+
         public void SetDestroyGain(int gain)
         {
             _destroyOption.Price = Mathf.Max(0, gain);