- Added role and tier fields to the ProfileUpdate model, allowing for better user role management.
- Implemented new API endpoint for listing admin users, accessible only to portal admins.
- Updated profile retrieval and update logic to handle role and tier changes, enforcing permissions for modifications.
- Enhanced frontend navigation and routing to include the new admin users page, improving admin interface usability.
- Bumped application version to 0.8.19 and updated changelog to reflect these changes.
