0312 整理战场和主界面的关系；增加获取当前激活的战场接口GetActiveBattleName

hch

2025-10-21 4dc1c86671e53f830f2ef9996d9dba0ada58099e

 Main/System/Battle/BattleField/BattleRootNode.cs

@@ -56,6 +56,7 @@
      if (imgBackground != null)
      {
         imgBackground.texture = texture;
         imgBackground.raycastTarget = false;
         // imgBackground.SetNativeSize();
      }
   }