fix: 直接保存互斥区的路线ID，移除不必要的过滤逻辑以简化代码

src/services/editor.service.ts

@@ -521,7 +521,8 @@ export class EditorService extends Meta2d {
       });
     }
     if (MapAreaType.互斥区 === type) {
-      area.routes = routes?.filter((v) => !isEmpty(this.getPenById(v)?.area));
+      // 互斥区直接保存路线ID，不需要过滤
+      area.routes = routes;
     }
     return area;
   }