improvement: fdi tooth chart selection modes polished. bugs related to teeth selecyion fixed.

.cursor/skills/lab-cases/SKILL.md

@@ -12,8 +12,10 @@ description: Lab Cases tab — list, filters, detail panel, assignment, share QR
 ## List behavior
 
 - **Default sort:** `sentAt` desc (newest first).
+- **Page size:** `PAGE_SIZE = 10` in `CasesPage.tsx`.
 - **Auto-select:** On tab open / after filter reload, select first list item if none selected; keep selection when still in list; `?caseId=` URL wins.
 - **Right panel:** Always shows detail for selected case when list non-empty (loading state while fetching).
+- **Left rail layout:** section is `flex flex-col` + `lg:min-h-[420px]` / `h-full` with `lg:items-stretch` on the grid; case list wrapper is `flex-1 min-h-0 overflow-y-auto` (do **not** use a fixed `max-h-[55vh]` — that leaves empty space above pagination).
 
 ## Filters (`GET /cases`)
 

.cursor/skills/lab-tasks/SKILL.md

@@ -66,7 +66,7 @@ Components: `TaskCaseGroupHeader`, `TaskProsthesisGroupHeader`, `TaskRow`.
 ## APIs
 
 - `GET /tasks` — paginated flat task list (grouping is client-side when `sortBy=date`)
-- `PATCH /tasks/:taskId` — update status (only assignee or unassigned task)
+- `PATCH /tasks/:taskId` — update status (only assignee or unassigned task). Completing **`intraoral_scan`** also completes every other `intraoral_scan` task in the same case (case-scoped; catalog first step for all prosthesis types).
 - `GET /tasks/filter-options` — clinics + workflow steps (localized)
 - `GET /tasks/locate-page` — page number for a task in the sorted filtered list
 - `GET /cases/assignable-staff` — staff eligible for task assignment

.cursor/skills/treatment-workspace/SKILL.md

@@ -40,12 +40,13 @@ Right-column entry uses `WizardStepper` (`components/ui/shared/WizardStepper.tsx
 
 | Step | UI | Notes |
 |------|-----|--------|
-| **Teeth** | `FdiToothChart` | Shift+click connected range; Ctrl/⌘+click single range; linked dots |
+| **Teeth** | `FdiToothChart` | Shift+click connected bridge (union if overlap); click cuts tooth from bridge as selected single |
 | **Content** | `TreatmentDetailsEditor` fields only (`showChrome={false}`) | Type / **Notes** / attachments — **no delete button** |
 | **Lab** | `LabCasesDispatchPanel` | Shown in stepper **only** when active detail type is lab-dependent (`labDependentCodes`). Entering Lab **auto-ensures** a shipment draft (no “Add lab shipment” click). Add detail stays ungated. Due date beside title (RTL via logical end). Prosthesis dropdown same-row from `md`. |
 
 - Detail type may differ from appointment purpose (purpose only defaults new details).
 - Next/Back navigate visible steps; leaving prosthesis while on Lab returns to Content.
+- Switching `activeDetailId` resets the wizard to **Teeth**, unless `pendingEntryStepRef` is set to `lab` first (lab shipments rail / “Go to dispatch” / load-with-focus). That ref prevents the reset effect from overwriting Lab on the first click.
 
 
 
@@ -53,12 +54,11 @@ Right-column entry uses `WizardStepper` (`components/ui/shared/WizardStepper.tsx
 
 
 
-Helpers: `frontend/src/components/treatment/toothSelectionGroups.ts`. Persisted as `toothSelectionGroups` on the detail; lab tasks group by `selectionGroupId`.
+Helpers: `frontend/src/components/treatment/toothSelectionGroups.ts`. Persisted as `toothSelectionGroups` on the detail. Lab **dispatch** rows are 1:1 with selection groups; after send, Cases/Tasks **merge** teeth by prosthesis type (not by selection group).
 
-- **Plain click:** add/remove single; if tooth is in a **connected** group → drop the whole span and keep **only** that tooth as a single (no peel / no connected+single pair for the same span).
-- **Shift+click:** inclusive same-arch range → one **connected** group (linked dots above/below). Shift wins if Ctrl also held.
-- **Ctrl/⌘+click:** same range, but each tooth as its own **single** (one lab-dispatch row per tooth).
-- Prevent browser selection artifacts (`select-none`, modifier `preventDefault` on mousedown).
+- **Plain click:** add/remove single; if tooth is in a **connected** bridge → cut it out as a selected **single** (second click deselects). End of bridge → remainder stays connected (≥2) or demotes to single. Middle → left and right become separate groups. Never a 1-tooth connected (no lone dots).
+- **Shift+click:** inclusive same-arch range → one **connected** bridge; if the range overlaps existing bridges, **union** them into one bridge. Non-overlapping bridges stay separate.
+- Prevent browser selection artifacts (`select-none`, Shift `preventDefault` on mousedown).
 - On group change, prune/remap `labCase.toothProsthesis` via `pruneToothProsthesisForGroups`.
 - Connected UI label: `ConnectedSelectionBadge` (shared `Badge` + primary tint) in dispatch + lab case lists.
 - Lab case comments: shared `LabCaseCommentsPanel` — newest-first; **sent** = `justify-start` / `text-start`, **received** = `justify-end` / `text-end` (RTL-safe); require `viewerSide: 'LAB' | 'CLINIC'`. Used in Cases, Tasks, share focus, and Treatment (`DetailLabCaseCommentsSection`). Composer: `h-9` input + primary send / visibility buttons (white icons; Send mirrored in RTL).