Ships #571: /account is the friendly owner home — connect dedup (checklist
owns it), token-mint UI removed (OAuth-first), backup state surfaced live
('✓ Backed up — full version history' + Back up to GitHub), build-your-own-UI
hint, single 'Advanced vault settings ↗' entry point.

Tag v0.6.4-rc.5 → npm dist-tag `rc`.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>