Desktop icons move from lucide to Phosphor (@phosphor-icons/react, per-icon imports, regular weight; fill for the
active nav item, notices and rating stars). The site's icons and the fixture art use Phosphor's own files from
@phosphor-icons/core. App Store and Google Play are shown with their marks from simple-icons (CC0 data), vendored
unchanged by tools/site-icons.ts and rendered as a mask in the neutral text colour next to the store's name; the
trademark note is in docs/desktop.md and the site footer. lucide-react and lucide-static removed. The
no-hand-written-SVG guard allows only the vendored files (byte-equal to their packages) and per-icon Phosphor
imports. Site stylesheet ?v= bumped.
