Extend VContainer DI: eliminate manual composition and duplicate references

- Register InventoryModel, ShopModel as container-managed singletons
- Register GameController, ShopController, InventoryController via RegisterComponent
- Replace [SerializeField] with [Inject] for service dependencies in controllers
- Move maxActiveModifierSlots config to GameLifetimeScope (composition root)
- Remove manual model creation and Initialize() calls from GameController
- Add ToggleVisibility() to ShopController/InventoryController, removing GetComponentInChildren
- Move event subscriptions from Awake to Start for safe VContainer injection order
- Transfer game startup orchestration to GameController.Start()

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Assets/Scripts/Shop/ShopController.cs

@@ -1,4 +1,5 @@
 using UnityEngine;
+using VContainer;
 using YachtDice.Economy;
 using YachtDice.Modifiers.Definition;
 
@@ -6,27 +7,30 @@ namespace YachtDice.Shop
 {
     public class ShopController : MonoBehaviour
     {
-        [SerializeField] private ModifierCatalogSO catalog;
         [SerializeField] private ShopView shopView;
-        [SerializeField] private CurrencyBank currencyBank;
 
+        private ModifierCatalogSO catalog;
+        private CurrencyBank currencyBank;
         private ShopModel model;
 
         public ModifierCatalogSO Catalog => catalog;
 
-        public void Initialize(ShopModel shopModel)
+        [Inject]
+        public void Construct(ModifierCatalogSO catalog, CurrencyBank currencyBank, ShopModel model)
         {
-            model = shopModel;
+            this.catalog = catalog;
+            this.currencyBank = currencyBank;
+            this.model = model;
+        }
 
+        private void Start()
+        {
             shopView.OnBuyClicked += HandleBuyClicked;
-
-            if (currencyBank != null)
-                currencyBank.OnBalanceChanged += HandleCurrencyChanged;
-
+            currencyBank.OnBalanceChanged += HandleCurrencyChanged;
             model.OnItemPurchased += HandleItemPurchased;
 
             shopView.Populate(catalog.All, model);
-            shopView.UpdateCurrencyDisplay(currencyBank != null ? currencyBank.Balance : 0);
+            shopView.UpdateCurrencyDisplay(currencyBank.Balance);
         }
 
         private void OnDestroy()
@@ -41,6 +45,16 @@ namespace YachtDice.Shop
                 model.OnItemPurchased -= HandleItemPurchased;
         }
 
+        public void ToggleVisibility()
+        {
+            if (shopView == null) return;
+
+            if (shopView.IsVisible)
+                shopView.Hide();
+            else
+                shopView.Show();
+        }
+
         private void HandleBuyClicked(ModifierDefinitionSO def)
         {
             model.TryPurchase(def);