refactor(任务卡片): 使用close方法替代直接设置node.active

将直接设置node.active改为调用close方法，提高代码可维护性和一致性

assets/script/game/map/MissionCardComp.ts

@@ -263,7 +263,7 @@ export class MissionCardComp extends CCComp {
                if (this.card4.active && !this.purchasedSlots[4]) allPurchased = false;
                
                if (allPurchased) {
-                   this.node.active = false;
+                   this.close();
                }
                return;
            }
@@ -304,7 +304,7 @@ export class MissionCardComp extends CCComp {
                         oops.message.dispatchEvent(GameEvent.CallFriend, { uuid: selectedData.uuid });
                     }
                     // 后续扩展其他类型事件
-                    this.node.active = false;
+                    this.close();
                 })
                 .start();
        }