Build a full-stack mobile app using React Native (Expo) that works seamlessly on both Android and iOS platforms. The app should be styled professionally and include all necessary functionality inside the app (no external dashboards or tools).

Use Supabase as the backend for authentication, database, and real-time functionality.

Project Description: Create a modern, responsive, production-ready mobile application designed for cross-platform deployment. Use best practices in architecture and folder structure as a senior mobile developer would.

Key Features:

1. User Authentication (email/password, Google, and OTP using Supabase)
2. Profile Management (view/edit profile, avatar upload)
3. CRUD functionality for user-generated content (posts, items, etc.)
4. Real-time data updates (e.g. new post notifications or chat)
5. Secure session handling with refresh tokens
6. In-app navigation using React Navigation
7. Local storage using AsyncStorage or SecureStore
8. Offline fallback and error handling
9. Push Notifications (Expo Notifications)
10. Clean, modular folder structure with reusable components
11. Dark/Light mode toggle
12. State management using Context API or Zustand
13. Auto-login with session restoration
14. Deployment-ready for Play Store and App Store

Tech Stack:

• Frontend: React Native (Expo)
• Backend: Supabase (Auth, DB, Storage, Realtime)
• API: Supabase client SDK
• Styling: Tailwind (via nativewind) or styled-components
• State Management: Context API or Zustand
• Push: Expo Notifications
• Environment: .env support

Output Requirements:

• Use TypeScript
• Code should be well-documented and modular
• Include Expo config, Supabase initialization
• Use app/ directory structure (for Expo Router, if applicable)
• Include logic for build testing and production

Generate the full project setup, including folder structure, config files, and code snippets for all major screens: Login, Register, Home, Profile, Settings, PostList, PostDetail, and NewPost.