- ApiKeysPanel: dropped invalid variant="ghost" on GnIconButton (the
  component has no variant prop — it leaked into the DOM as an attribute)
- Icon audit: all icon props/classes carry the required ph base class
  and ph- prefix (kit v1.0 dev-warning otherwise); variant whitelist
  (primary/secondary/warning/danger/info) confirmed against the kit
- webclient/CLAUDE.md: new 'Design system (gnexus-ui-kit v1.0)' section
  — points to vendor/gnexus-ui-kit/CLAUDE.md, documents prebuilt-css
  consumption, dark kit.css theme, --gn-* + kit-deps tokens, icon rule,
  test-locked app classes, and the documented non-kit surfaces