Migrate many view templates from raw PHP to Twig and modernize UI/UX for 2FA and settings. Controllers updated to provide avatar data and two-factor info (ProfileController, UserController) and SettingsController now includes timezone lists, notification preset selection, cron path, cached update state and rollback availability. ErrorHandler now attempts to render error pages via a new Core\TwigService with a safe fallback to raw PHP views. TwoFactorService generation silences deprecated warnings during QR code creation. Numerous .php view files were removed and replaced with .twig equivalents (2fa setup/verify/backup-codes and many auth, dashboard, domains, errors, layout, users, tags, tld-registry, etc.), and core/TwigService was added. These changes move the app toward a Twig-based templating system, improve 2FA flows, surface avatar images in lists/profiles, and make error rendering more robust.
Introduces controller actions and UI modals for admins to edit WHOIS and RDAP servers for TLDs. Updates redirect logic to return users to the correct page after actions. Adds new POST routes for updating WHOIS and RDAP servers. Improves clipboard copy feedback in the debug WHOIS view.
