Add social login (Discord/Google) + batch-6 pages
Auth: NextAuth Discord + Google providers (enabled when env id+secret set);
OAuth signIn allowed only if a hotel account matches the email; jwt binds the
session to that account (id/rank/username). Login page gets social buttons.
Batch 6 (parallel agents): /friends (messenger_friendships), /guilds/[id]/forum
(threads), /admin/navigation (navigator config), /admin/maintenance (toggle
maintenance settings), /admin/alerts (alert_logs + send hotel alert via RCON).
Header (Friends) + admin nav (Alerts/Maintenance/Navigator) extended.
Verified: tsc exit 0, vitest 48/48, next build exit 0 (57 page routes).
Simo
486ce51559