Member Library Platform 0.12.0

Puts the Library menu in one deliberate order (Dashboard, Courses, Series, Content, Speakers, Collections, Topics, Homepage, Announcements, Access Groups, Settings, Migration) and turns the Dashboard into a status hub: one card per subsystem with a Live / Draft / Review / Needs attention badge, the one number that matters, and a link. Covers catalogue drafts, Access Groups, the app connection, the homepage layout, and migration. Includes 0.11.0 Access Groups redesign, 0.10.2 write-only revocation secret, and 0.10.1 catalogue speed-up.