引擎侧和物料库的通信

场景：引擎侧（页面渲染或者构建的地方）去拖拽了组件，然后去预览页面。调用某个接口获取到了一些id之类的信息，然后我需要在自己物料库的组件里面能获取到，有什么方案可以通信吗？目前采用的是挂在window上面，不是很优雅，而且也不是响应式的

Start by clarifying the communication contract between the engine-side preview or build context and components in the material library. The issue names no files, entry points, or tests; done would require an agreed reactive alternative to attaching data on window, along with documented behavior and coverage for the proposed integration.

Written by the indexing model from the issue text.