Brings in the mobile-app work from the design handoff session as a
sub-project alongside the backend:
- app/ React Native + Expo iOS implementation (components, screens,
state, theme tokens)
- chats/ design conversation transcript(s)
- project/ Claude Design export (HTML prototype + design-system tokens)
Kept the backend's top-level README.md; the design-handoff instructions
are preserved at project/HANDOFF.md.