- Add refreshToken() method to automatically refresh expired tokens
- Add isTokenExpiringSoon() to check if token expires within 1 hour
- Store password in SecureStore for auto-refresh capability
- Add periodic token check every 30 minutes in WebView
- Intercept WebView navigation to login pages and refresh instead
- Re-inject fresh token into WebView localStorage after refresh
- Add metro.config.js to fix Metro bundler path resolution
This prevents the app from showing web login page when session expires.
