The app uses a storage abstraction layer that makes it easy to switch between different storage backends:

• Currently using browser localStorage for persistence
• Will transition to Firebase in the future
• All storage operations are async to match Firebase's API
• Storage service handles both intentions and weekly focus data

To switch to Firebase:

1. Create new FirebaseStorageService class implementing StorageService interface
2. Update storage.ts to export Firebase implementation instead of localStorage

• Intentions and weekly focus are stored separately
• All storage operations are wrapped in try/catch for error handling
• Loading state prevents saving partial data during initial load