Confirm Q8 account/settings IA and ship the closed-beta gap:
- Extend POST /auth/login with display_name (required for DEMO-YKAVU)
- Entry screen tabs: signup vs already-registered login
- Settings hub with tone, autonomy, sessions, data-flow, logout
- Logout revokes current session and clears local token
Co-authored-by: okuma <o0kuma@users.noreply.github.com>
Add decision-log Q8/Q9 as proposals, account-settings-ia.md for Phase 1
invite-only auth + logout/settings IA, and align PRD/tech-design/roadmap
so implementation waits for Master confirmation.
Co-authored-by: okuma <o0kuma@users.noreply.github.com>