- Implemented OAuthClientsController for CRUD operations on OAuth clients.
- Added SecurityController to manage security settings.
- Created SubscriptionsController for handling subscriptions with export functionality.
- Developed TenantsController for tenant management including create, edit, and delete operations.
- Added views for each controller to facilitate user interaction.
- Introduced layout and shared views for consistent admin UI.
- Implemented model classes for handling data in views.
- Added validation and error handling in forms.
