src/app/home-page/components/ArticleFeed.tsx:597 — the article-card badge
shown when promoted==='client' said '◆ Advertiser' with a title tooltip
'Advertiser coverage: <name>'. Both copies now say 'HIGHLIGHT' / 'Highlight: <name>'.
Visual treatment (diamond glyph, blue token, uppercase tracking) preserved.
The ★ Featured badge for promoted==='premium' is untouched.
Note: BB still has the original 'Advertiser' label; this change is avbeat-only
unless Ryan asks for it mirrored on BB.