The header badge now uses the exact visual treatment of
.creds-title-version-badge from modals.css: neutral translucent pill
(rgba(255,255,255,0.06) background, 0.08 white border, 12px radius,
--text-secondary text, 0.72rem/600/2px-10px padding), no hover
animation, and a bare version number like the modals show (e.g.
"2.8.4") instead of the green pill with a "v" prefix.
The badge markup flattens to a single text span; the .version-label
and .version-number rules are removed.
Co-authored-by: arena-agent <297053741+arena-agent@users.noreply.github.com>