The buttons were flat and the reused .tooltip-content rendered in music's
default purple. Now everything is driven by --ve-accent (on the container so the
tooltip inherits it):
- buttons mirror music's .musicbrainz-button — always-on accent glow, accent
gradient/scale on hover, bigger glow when active; logo 24px @0.85 opacity with
drop-shadow; spinner uses the accent.
- tooltip-content border/glow/arrow/header + the status value are tinted with
the service accent (TMDB blue / TVDB green), overriding music's purple default
scoped to the video tooltip only. Music untouched.
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