- Add delete button with self-delete guard (parses JWT sub claim)
- Add ConfirmDeleteDialog for safe user deletion
- Add MultiSelectDropdown for group membership assignment with remove buttons
- Add MultiSelectDropdown for direct role assignment with remove buttons
- Inherited roles show source but no remove button
- Change Created date format from date-only to full locale string
- Remove unused formatDate helper
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Tab-based admin page at /admin/rbac with split-pane entity views,
inheritance visualization, OIDC badges, and role/group management.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
