Adapter / DTO

Translating between layer shapes.

Where: ReelsPresenter (adapts app state to the pixi-reels API), response mappers in infrastructure/.

The rule: when two layers have different shapes, put a thin adapter at the boundary. Don't leak the outer shape inward.

DTO note: network responses are DTOs. Validate them at the boundary (NetworkManager) and hand domain-shaped data to the rest of the app. Do not pass raw JSON through phases.