improvement: Some improvements done. some bugs fixed.

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

@@ -43,7 +43,7 @@ Right-column entry is **not** a three-step wizard. Type dropdown + `TreatmentDet
 | **Treatment** | Type dropdown + `TreatmentDetailAttachmentsStrip`, `FdiToothChart` / `ProsthesisAssignChart`, full-width Notes | Always |
 | **Lab** | `LabCasesDispatchPanel` under the form | When active detail type is lab-dependent. Auto-ensures a shipment draft (teeth/arch not required to create the draft). **No default lab or prosthesis type** on a new detail (including siblings in the same plan). Last **3 sent** labs appear as chips under search — pick is explicit. Comments stay on the dispatch panel. |
 
-- Prosthesis types are assigned on the chart (`ProsthesisAssignChart` + `ProsthesisJobPopover` in `prosthesisTree.ts`). One restoration slot per tooth (crown / indirect / screw-retained); implant abutments and post & core **stack**. Arch products (denture, night guard, digital) use **Upper arch / Lower arch** labels and store `UA`/`LA` rows — they do not select 16 FDI teeth. Lab dispatch is on the same screen (no Treatment → Lab stepper).
+- Prosthesis types are assigned on the chart (`ProsthesisAssignChart` + `ProsthesisJobPopover` in `prosthesisTree.ts`). One **restoration** slot per tooth (crown / veneer-inlay-onlay-overlay); **screw-retained** is an implant add-on (`stackGroup: implant`, paints the crown) and stacks with a restoration. Implant abutments and post & core also stack (post & core stays off when the implant is screw-retained). Complete denture / overdenture / appliances / digital use **Upper arch / Lower arch** (`UA`/`LA`). **Partial denture** is tooth-level (select FDI teeth, Removable in the tooth picker); after send it is **one lab job** for all those teeth. Picker leaves are filtered by `chartRegion` so Removable appears in both tooth and arch pickers. Lab dispatch is on the same screen (no Treatment → Lab stepper).
 - Detail chips show **type + teeth**, not “Detail N”. Lab-dependent chips use colored sent/unsent text (same size as the label); sent date stays on Lab dispatch.
 - Detail type may differ from appointment purpose. Purpose seeds the first line of an empty **appointment** draft (first open, and **Add detail** when the plan is `[]`). Later **Add detail** starts with an empty type. Unscheduled / New treatment still seeds a blank first line.
 - Lab shipments rail / “Go to dispatch” / load-with-focus **scrolls** to the dispatch panel (`pendingScrollToLabRef` + `labPanelRef`).
@@ -55,14 +55,14 @@ Right-column entry is **not** a three-step wizard. Type dropdown + `TreatmentDet
 
 
 
-Helpers: `frontend/src/components/treatment/toothSelectionGroups.ts`. Persisted as `toothSelectionGroups` on the detail. Lab **dispatch** lists **one row per tooth** (`LabCaseToothJobsList`, colored catalog types). After send, Cases/Tasks keep one item per tooth; stacked types on that tooth **union** their workflow steps (not merge teeth by type). `LabCaseTask` unique key includes `tooth`.
+Helpers: `frontend/src/components/treatment/toothSelectionGroups.ts`. Persisted as `toothSelectionGroups` on the detail. Lab **dispatch** lists connected teeth that share a type as **one row** (`LabCaseToothJobsList`); unconnected teeth stay one row per tooth (stacked codes stay together). After send, Cases/Tasks match that: a connected same-type bridge is one pipeline; stacked types on a **single** tooth **union** their workflow steps; `partial_denture` is one task set per `sourceKey`. `LabCaseTask` unique key includes `tooth` (first tooth of a merged bridge).
 
 Chart hit-testing (`FdiToothChart.tsx`): the hit target is the **unrotated full cell** (`pointerdown` + keyboard). Do **not** bind both `pointerdown` and `click` (double-toggle looks like a miss). Visual glyph is `pointer-events-none`; tilt lives on the outer wrapper; **scale/hover is nested inside** so inline `transform` does not kill scale. Horizontal inset (~22%) leaves a dead zone between teeth; FDI numbers are also clickable (`ToothNumber`).
 
 - **Plain click:** add/remove single; deselecting a tooth in a bridge removes it and splits/shrinks remaining sides (never a 1-tooth connected group).
 - **Neighbor circles:** when two arch-adjacent teeth are both selected, an empty circle appears **between** them (not per-tooth). Click empty → connect; click filled → disconnect (teeth stay selected). Transitive A–B + B–C = one bridge.
 - **Shift+click:** inclusive same-arch range → all selected as **singles** (empty circles); overlapping existing bridges are absorbed as singles too. Midline neighbors (11–21, 41–31) allowed.
-- **Prosthesis assign chart:** Shift = range then assign to the span; Ctrl/Cmd or drag copies the last type-set. Arch products open from the Upper/Lower arch labels and store `UA`/`LA` (not 16 FDI teeth). `pruneToothProsthesisForGroups` must keep those sentinels.
+- **Prosthesis assign chart:** Shift = range then assign to the span; Ctrl/Cmd or drag copies the last type-set. Click a selected tooth **opens the picker**; click drops a tooth only from an in-progress Shift range that still has no jobs. Arch products open from the Upper/Lower arch labels and store `UA`/`LA` (not 16 FDI teeth). Partial denture is assigned from selected teeth (not the arch labels). `pruneToothProsthesisForGroups` must keep those sentinels.
 - 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.
@@ -80,7 +80,7 @@ Chart hit-testing (`FdiToothChart.tsx`): the hit target is the **unrotated full
 
 | **Preview** | `previewTreatment`; `selectedPreviewId !== null` = **browse mode** | History click updates preview only |
 
-| **Form** | `details[]`, `labCaseDrafts[]` | Appointment change → draft API; **Load into workspace** → hydrate |
+| **Form** | `details[]`, `labCaseDrafts[]` | Appointment change → draft API; **Load into workspace** → hydrate. Autosave and strip-switch **flush both** `saveDraft` then `saveLabCases`. Dirty includes the lab-case snapshot (jobs, dest, due date), not only details. Non-prosthesis plans keep empty drafts and do not create lab rows. |