# App Layer

`lib/app/` holds app-level code that is not one product slice:

- `relationship_saver_app.dart`: root widget and global listeners.
- `navigation/`: typed shell destinations.
- `presentation/`: responsive app shell.
- `data/`: aggregate prototype repository and persistence plumbing.
- `state/`: shared aggregate snapshot used by the current local-first store.

This is the place to change boot flow, shell behavior, or prototype-wide state
composition.