## What's new
Compliance, audit, and account lifecycle improvements — admin actions are now fully auditable, user data is properly anonymized on deletion, and OAuth signup flow gives users control over their profile.
### Audit
- Added audit logging for all admin actions (user activate/deactivate, team BYOC toggle, team delete, template delete, build create/cancel)
- Added admin audit page with infinite scroll and hierarchical filters
- Fixed audit log team assignment — admin/host actions now correctly land under PlatformTeamID
- Anonymize audit logs on user hard-delete (actor name, IDs, emails stripped)
- Deduplicated audit logger internals (665 → 374 lines, no behavior change)
### Authentication
- Separated GitHub OAuth login/signup flows — login no longer auto-creates accounts
- Added name confirmation dialog for new GitHub signups
### Account Lifecycle
- Email notification sent when account is permanently deleted after grace period
- Audit log anonymization tied to user purge (per-user transactional)
### UX
- Removed accent gradient bars from admin host dialogs (border + shadow only)
- Frontend renders deleted users as styled badge in audit log view
### Others
- Version bump
- Bug fixes
Reviewed-on: wrenn/wrenn#36
