If you were designing a SwiftUI app from scratch with dozens of screens and several teams working on it, how would you set up state management, navigation, dependency injection, and module boundaries?
Boundaries where Feature modules talk only through Interface contracts, screen state in @Observable ViewModels, app-wide state in a few Environment objects, navigation through a router that owns the NavigationPath (a Route enum per module), and DI created at the Composition Root and injected through Environment or init.
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