- Add Expo Router with bottom tabs (Home, Scan, Proforma, Payments, Profile)
- Home: earnings summary, quick actions, invoice list with Waiting/Paid filters
- Scan: placeholder for camera flow, recent scans list
- Proforma: list of proforma requests with send-to-contacts CTA
- Payments: pending match and reconciled list
- Profile: account info, about, logout
- Apply Yaltopia theme: primary orange (#ea580c), dark navbar/tabs (#2d2d2d)
- Add mock data (invoices, proforma, payments, user) in lib/mock-data.ts
- Root layout: GestureHandler, SafeArea, PortalHost; tab bar dark with orange active
Co-authored-by: Cursor <cursoragent@cursor.com>
