Three small audit v3 cleanups bundled:
* Bug-6 / §4.19 — AdminLanding Users card subtitle was stale
("Manage accounts") even though Invites shipped weeks ago.
Now: "Manage accounts and invites" to match Flutter.
* §4.22 — Account card never showed the admin badge. Flutter
appends " · admin" next to the username when isAdmin. Threaded
isAdmin through AccountCard and added the suffix.
* Bug-4 — NowPlayingBody used Column.Center with no scroll, so on
small-portrait or any landscape phone the cover + scrubber +
transport + actions row clip. Added verticalScroll so users on
small screens can scroll the body instead of losing affordances.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
cc6a8e2476