Since you're a user, I'm going to ask: what do you think as Postgrest with its UI working as a standalone app for boring data management and that kind of stuff? The case I have in mind is one in which a small company wants to get some data into the computer, for no specific reason, and wants to pay for an expensive software. Postgrest for the rescue! Or isn't it a good idea? (I have never used it aside from the demo)
Yes! postgrest + ng-admin for boring CRUD admin panels is perfect.
https://github.com/marmelab/ng-admin
And here a repo that has the http interceptor configured for postrest.
https://github.com/marmelab/ng-admin-postgrest
ngAdmin it's based on Angularjs, but marmelab has a version based on Reactjs too, that I did't have time to test yet.
[edit] Just to clarify, you said "its UI" but postgrest and ng-admin are independent pieces of software, that happened to work very nicely together.