- **Grouping:** only when `sortBy=date`; flat list + hint for other sorts. Unconnected teeth stay one pipeline; **connected** teeth that share a type share a pipeline; `partial_denture` is one pipeline for all selected teeth.
- **Prosthesis colors:** `PROSTHESIS_TYPE_COLORS` + `prosthesisTypeColorFromCatalog` as text (no type pills) — never row index. Stacked `code+code` labels use `ProsthesisStackedTypeLabel` (one color per type).
- **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.