Enables multi-user project collaboration mirroring the shared calendar
pattern. Includes ProjectMember model with permission levels, task
assignment with auto-membership, optimistic locking, field allowlist
for assignees, disconnect cascade, delta polling for projects and
calendars, and full frontend integration with share sheet, assignment
picker, permission gating, and notification handling.
Migrations: 057 (indexes + version + comment user_id), 058
(project_members), 059 (project_task_assignments)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Migration 036 adds ondelete rules to 5 transitive FKs that would
otherwise block user deletion (calendar_events via calendars,
project_tasks via projects, todos via projects, etc.).
DELETE /api/admin/users/{user_id} with self-action guard, last-admin
guard, session revocation, and audit logging. Frontend gets a red
two-click confirm button in the IAM actions menu.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Backend: TaskComment model + migration, comment CRUD endpoints,
task reorder endpoint, updated selectinload for comments
- Frontend: Two-panel master-detail layout with TaskRow (compact)
and TaskDetailPanel (full details + comments section)
- Sort toolbar: manual (drag-and-drop via @dnd-kit), priority, due date
- Kanban board view with drag-and-drop between status columns
- Responsive: mobile falls back to overlay panel on task select
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Backend:
- Add self-referencing parent_task_id FK on project_tasks with CASCADE delete
- Add Alembic migration 002 for parent_task_id column + index
- Update schemas with parent_task_id in create, nested subtasks in response
- Chain selectinload for subtasks on all project queries
- Validate parent must be top-level task (single nesting level only)
Frontend:
- Add parent_task_id and subtasks[] to ProjectTask type
- ProjectDetail: expand/collapse chevrons, subtask progress bars, inline
subtask rendering with accent left border, add/edit/delete subtask buttons
- TaskForm: accept parentTaskId prop, include in create payload, context-aware
dialog title (New Task vs New Subtask)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
