UI系统优化

Assets/_Game/Scripts/UI/MainMenu/MainMenuController.cs

@@ -1,7 +1,9 @@
 using System.Collections;
 using UnityEngine;
 using UnityEngine.UI;
+using UnityEngine.EventSystems;
 using BaseGames.Core;
+using BaseGames.Core.Assets;
 using BaseGames.Core.Events;
 
 namespace BaseGames.UI.MainMenu
@@ -61,7 +63,7 @@ namespace BaseGames.UI.MainMenu
 
         [Header("场景")]
         [Tooltip("新游戏 / 继续后进入的第一个游戏场景（Addressable Key）")]
-        [SerializeField] private string _firstGameSceneKey = "Scene_Game_Chapter1";
+        [SerializeField] private string _firstGameSceneKey = AddressKeys.SceneGameChapter1;
 
         // ── Event Channels ────────────────────────────────────────────────────
 
@@ -148,6 +150,9 @@ namespace BaseGames.UI.MainMenu
 
             _mainButtonsGroup.interactable   = true;
             _mainButtonsGroup.blocksRaycasts = true;
+
+            // 手柄导航：入场动画完成后将焦点置于第一个按钮
+            EventSystem.current?.SetSelectedGameObject(_btnNewGame?.gameObject);
         }
 
         // ── 按钮回调 ─────────────────────────────────────────────────────────