Expo Router Demo App Implementation

This PR implements a complete Expo Router version of the demo app with 100% feature parity to the React Navigation version.

Features Implemented

Authentication Flow

• Login Screen: Form validation, pre-filled credentials, password visibility toggle
• Welcome Screen: Logout functionality, navigation to demo tabs, responsive design
• Auth Routing: Context-based state management with automatic redirects

Tab Navigation (4 Screens)

• Community: External links, community resources, logos, hiring info
• Debug: App info, theme controls, Reactotron integration, logout
• Podcast: Episode list with favorites, animations, pull-to-refresh, API integration
• Showroom: Component showcase with drawer navigation and interactive demos

Advanced Showroom Features

• Drawer Navigation: Fully functional side menu for component selection
• Component Demos: Button, Text, and Card components with multiple use cases
• Deep Linking: Support for direct navigation to specific components via URL params
• Interactive: Tap drawer items to navigate, automatic drawer closing

Technical Excellence

• File-based Routing: Clean, intuitive Expo Router structure
• Context Integration: AuthContext and EpisodeContext providers
• Theme Support: Full dark/light mode with smooth animations
• RTL Support: Right-to-left language compatibility
• Error Handling: 404 page and proper error boundaries
• Type Safety: Full TypeScript integration with automatic route typing

File Structure

boilerplate/src/app/
├── _layout.tsx                 # Root layout with providers
├── index.tsx                   # Auth redirect logic
├── login.tsx                   # Login screen  
├── welcome.tsx                 # Welcome screen
├── (demo)/                     # Tab group
│   ├── _layout.tsx             # Tab layout
│   ├── community.tsx           # Community links
│   ├── debug.tsx               # Debug tools
│   ├── podcast.tsx             # Episode list
│   └── showroom/               # Component showcase
│       ├── index.tsx           # Drawer + demos
│       ├── demos/              # Component demos
│       └── [helpers]           # UI components
└── +not-found.tsx              # 404 error page

Benefits

For Users

• Same excellent demo experience as React Navigation version
• Better deep linking with clean URLs
• Improved web performance and SEO
• More intuitive file-based routing

For Developers

• Cleaner, more maintainable codebase
• Automatic route typing for better DX
• File-based routing reduces boilerplate
• Better alignment with modern React patterns

Testing Completed

• All authentication flows work correctly
• Tab navigation functions properly
• Showroom drawer opens and navigates correctly
• Deep links work for all screens
• Theme switching persists across navigation
• Podcast favorites functionality works
• All external links open correctly
• RTL layouts work properly

Migration Notes

This implementation maintains complete feature parity while providing the benefits of Expo Router:

• Navigation patterns: Converted from navigation.navigate() to router.push()
• Route parameters: Using useLocalSearchParams() instead of useRoute()
• Deep linking: Built-in URL parameter handling
• Tab structure: Using file-based (demo) group instead of createBottomTabNavigator
• Context providers: Maintained in root layout for global access

Ready for Review

The Expo Router demo app is production-ready and provides users with the same high-quality experience they expect from Ignite, with the added benefits of modern file-based routing.

Users can now select Expo Router during app generation and get a fully functional demo app that showcases all components and features!