Archived
Backend: - Add groups Django app with models: Group, GroupMember, GroupInvite, JoinRequest - Create serializers with business rule validation - Implement GroupViewSet with full CRUD + custom actions (members, invites, roles, leave, join requests) - Add JoinGroupViewSet for invite-based joining flow - Register app in Django config and URL routing Frontend: - Add shared types for groups to @cloud-reader/shared - Create groups API client (groupsApi) - Build GroupsListPage, GroupDetailPage (member mgmt, invites, role transfer) - Build CreateGroupPage and JoinGroupPage - Add lazy-loaded routes to App.tsx with ProtectedRoute - Add navigation links to Library header Ref: #28