I think writing an abstraction that allows you to decouple your app in a way that you could use either Angular or React is going to take far longer than just rewriting your app if you ever get to the point of needing to switch.
In case of a UI, the trick is not so much to write an abstraction for this, but to write the application logic such a way that it does not depend on the UI framework.
Your own UI code should be limited to displaying the data with the help of the framework. This minimal UI code should depend on the application code and that should be the only dependency between the two.
There are simple techniques to keep view logic and application logic decoupled, for example by introducing a separate data structures prepared and optimized for view components to consume. An added bonus of this is testability of both application and UI logic without opening a browser.
