OpenIcon gallery: all 370 icons on /openicon, with search, filters and terminal glyphs (#199)

Replaces the 47-icon sample with the whole reference set: search by name,
alias or keyword; category chips with counts; UI/brand filter; SVG,
Nerd Font, Unicode or ASCII view (the Nerd Font view uses the official
symbols subset to the set's 349 glyphs, 38 KB woff2, MIT); size and
colour; a detail panel with all three glyphs and codepoints, trademark
notes, copy SVG / <img> / icon("key"), and downloads. Ready for the
optional HQ (full-colour) style: a Simple/HQ toggle appears once icons
carry an hq field. Filters live in the URL.

Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/logicsrc-web/public/openicon/set/svg/ubuntu.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><title>Ubuntu</title><g transform="translate(2 2) scale(0.83333)"><path d="M17.61.455a3.41 3.41 0 0 0-3.41 3.41 3.41 3.41 0 0 0 3.41 3.41 3.41 3.41 0 0 0 3.41-3.41 3.41 3.41 0 0 0-3.41-3.41zM12.92.8C8.923.777 5.137 2.941 3.148 6.451a4.5 4.5 0 0 1 .26-.007 4.92 4.92 0 0 1 2.585.737A8.316 8.316 0 0 1 12.688 3.6 4.944 4.944 0 0 1 13.723.834 11.008 11.008 0 0 0 12.92.8zm9.226 4.994a4.915 4.915 0 0 1-1.918 2.246 8.36 8.36 0 0 1-.273 8.303 4.89 4.89 0 0 1 1.632 2.54 11.156 11.156 0 0 0 .559-13.089zM3.41 7.932A3.41 3.41 0 0 0 0 11.342a3.41 3.41 0 0 0 3.41 3.409 3.41 3.41 0 0 0 3.41-3.41 3.41 3.41 0 0 0-3.41-3.41zm2.027 7.866a4.908 4.908 0 0 1-2.915.358 11.1 11.1 0 0 0 7.991 6.698 11.234 11.234 0 0 0 2.422.249 4.879 4.879 0 0 1-.999-2.85 8.484 8.484 0 0 1-.836-.136 8.304 8.304 0 0 1-5.663-4.32zm11.405.928a3.41 3.41 0 0 0-3.41 3.41 3.41 3.41 0 0 0 3.41 3.41 3.41 3.41 0 0 0 3.41-3.41 3.41 3.41 0 0 0-3.41-3.41z"/></g></svg>