Add authentication flow and bottom tab navigation #47
Description
Component
- formulus (React Native mobile app)
Feature Description
Implement authentication flow (Welcome, Server Config, Login) and navigation structure (bottom tabs + menu drawer) for Formulus mobile app.
Problem Statement
App lacks authentication flow and navigation structure for users to configure server, login, and navigate between sections.
Proposed Solution
- Phase 1: Welcome, Server Configuration, and Login screens with QR scanning
- Phase 2: Bottom tab navigation (Home, Forms, Observations, Sync, More) and menu drawer
Additional Context
- This is the foundation for future phases (Forms tab, Observations tab)
- The authentication flow should integrate with the existing server configuration service
- Navigation structure should follow React Navigation best practices