refactor(map): 移除技能框背景节点相关代码

1.  删除SskillBoxComp中bg_node属性和updateBgNode方法
2.  精简prefab中冗余的节点配置
3.  修复CardLiteComp的canup渲染覆盖问题

assets/script/game/map/CardLiteComp.ts

@@ -80,6 +80,8 @@ export class CardLiteComp extends CCComp {
         this.bindEvents();
         this.opacityComp = this.node.getComponent(UIOpacity) || this.node.addComponent(UIOpacity);
         this.opacityComp.opacity = 255;
+        // onLoad 在 addChild 时才触发，晚于 setHeroByUuid；此处按已赋值的数据重新判定 canup，避免覆盖渲染结果
+        this.refreshCanUp();
     }
 
     onDestroy() {
@@ -104,6 +106,7 @@ export class CardLiteComp extends CCComp {
         this.card_uuid = uuid;
         this.node.active = true;
         this.applyHeroUI(hero);
+        this.refreshCanUp();
         mLogger.log(this.debugMode, "CardLiteComp", "setHeroByUuid", { uuid });
     }