4. Authentication & User Roles

🔑Token System:

• The app uses an access token for API authentication.
• Token expires:
  • After 15 minutes of inactivity
  • After 1 day, regardless of usage
• On token expiration: API returns “Unauthorized” → user is redirected to onboarding.

🗃️Caching:

• Stores:
  • Selected theme (dark/light/system)
  • Selected language
  • File/image caches
• On logout: All caches cleared (except theme/language)