- **Important first:** `pinImportant=true` (sort pin, not filter).
- **Task assignment:** assign in Cases (`TAB_CASES_EDIT`); status edit on Tasks only for assignee or unassigned tasks; others see “Assigned to {name}”.
- **Grouped comments:** when `sortBy=date`, one comments icon on **case header** (not per row); flat sort keeps per-row comments.
- **Share link page** (`/lab-case/[token]`): reuses `TaskRow` + assignee rules; comments via token API — see `.cursor/skills/lab-case-share-link/SKILL.md`.
- **Mobile UX:** `LAB_TASK_STATUS_SELECT_CLASS` (44px tap target on small screens); `TaskCaseGroupHeader` sticky while scrolling grouped tasks; filter selects use same touch sizing on Tasks.