Using ActiveJS with Angular doesn't require any special bindings or facade, you can treat ActiveJS as an extension of RxJS, and use it in the same way.
That being said, you should still try to follow the general guidelines regarding how you structure your code.
In addition to general guidelines, one thing specific to Angular is DI and Services. So. instead of directly exporting the Units and other ActiveJS constructs from a file, you put them in a Service.
Ideally, you'd have two to three Services, 2 for State Management (ActiveJS) and 1 for general business logic or Angular related logic.
[feature].streams.tsThe FeatureStreams Service contains all the side-effects built using Streams and Angular's
[feature].service.tsThe FeatureService is an optional Service, which can contain any custom logic depending on your use-case.
For example, if we have a feature called Auth, we would create 3 Services like this:
auth.state.ts- with Service name AuthState
auth.streams.ts- with Service name AuthStreams
auth.service.ts- with Service name AuthService