Header Discord Entry & Brand Asset Refresh

A config-driven Discord community entry in the landing header, redesigned favicon, app icons and hero images, and locale handling refactored to an enum with better default resolution.

This release polishes the landing page community entry point and the default brand assets.

Updates

The landing header (desktop controls and mobile menu) gains a config-driven Discord button, so a single config entry surfaces your community link.
Default favicon, app icons, OG image, and hero images were redesigned at higher resolution, giving fresh deployments a polished look out of the box.
Locale handling was refactored to an enum with safer default-locale resolution, reducing i18n misconfiguration risk in derivative projects.