Warez-style hand-drawn logo, IBM VGA webfont inlined for exact
full-width scaling without JS, light/dark schemes, clickable nix
attrset profile with project links, robots.txt and eval-able
/profile.nix.

openai-agents 0.18.1 gained a websockets runtime dep that nixpkgs does not
declare yet, and nixpkgs' openai 2.53.0 is past omnigent's <2.45 cap.

jellyfin only listens on IPv4, but yellow.r also resolves to its
retiolum AAAA. nginx round-robined both addresses, so requests
hitting the v6 upstream failed and poisoned the upstream group,
causing intermittent 502 'no live upstreams' on flix.lassul.us.

Also drop the stale duplicate flix vhost from container-host.nix.