Added CSRF protection and enforced POST requests for user delete and toggle status actions in UserController. Updated the users index view to use JavaScript for submitting POST forms with CSRF tokens for these actions, improving security and user experience. Also improved login success messages to include the user's full name.
Introduces two-factor authentication (2FA) with TOTP, backup codes, and email codes. Adds controllers, services, views, and migration for 2FA setup, verification, and management. Updates user and settings models, email helper, and relevant controllers to support 2FA policy enforcement, configuration, and user flows. Enhances security by allowing admins to require or disable 2FA, and provides backup code generation and management for account recovery.
