- Added SessionGuard component to manage session expiration and online status.
- Updated AuthProvider to streamline session fetching and handling.
- Introduced IdentityProvidersSection for managing OAuth, SAML, and LDAP identity providers.
- Implemented identity provider guides for easier configuration.
- Enhanced mail settings with infinite scroll option for improved user experience.
- Updated global styles and layout components for better consistency across the application.
Move mail, compose, contacts, and accounts off mocks onto REST + WS.
Add client, auth store, IDB-backed query cache, offline queue, and
sync bar; hybrid Zustand for UI-only state. Settings still local until
backend has preferences API.
