Why does the role of the interactor in Clean Swift architecture include managing navigation and screen transitions?

In the Clean Swift (VIP) architecture, the interactor is responsible for business logic and data processing, but it also manages navigation and transitions between screens because it knows when and under what conditions to move to the next screen. This allows separating navigation logic from the UI layer (ViewController), making the code more modular and testable.

The interactor initiates transitions by calling the router, which implements specific transitions. This approach ensures:

• Centralization of navigation logic in one place.
• A clean ViewController that only handles display.
• Ease of testing navigation logic without UI.

Example: upon successful data processing, the interactor can call the router to transition to the next screen.