- Create GroupLeader model and migration
- Alter GroupLeader member field to include related_name
- Implement is_leader and is_owner methods in Group model
- Update GroupDetailView to pass leader and owner status to template
- Refactor group buttons and members display into separate templates
- Add view and URL for setting group leaders
- Update permissions for adding/removing members and clearing blacklist
- Bump version to 0.1.1 in uv.lock
