Built from rounds 5–7 of the wireframes. Sample data; everything is computed live from the transactions.
1. Log in with any password (4+ characters)
2. Unlock with Face ID or any 6 digits, then 3 onboarding steps (first time only)
3. Tap + to add an expense: Home, Budgets and Stats update
4. Tap a transaction to see, edit or delete it (with Undo)
5. Stats: tap slices, days, bars or accounts, then Open in Activity
6. Tap Personal ▾ to switch to the shared Kitchen space