After the legacy SVG layers and handler callbacks were dismantled, the
backing drag-state useStates, mirror useRefs, and watch-effects became
orphans, along with a handful of top-level math helpers whose callers
were already gone.
Removed:
- 12 dead `useState` declarations: `slabBoundaryDraft` /
`slabVertexDragState` / `slabHoleBoundaryDraft` /
`slabHoleVertexDragState` / `slabHoleMoveDraft` / `ceilingBoundary
Draft` / `ceilingVertexDragState` / `ceilingHoleBoundaryDraft` /
`ceilingHoleVertexDragState` / `ceilingHoleMoveDraft` /
`zoneBoundaryDraft` / `zoneVertexDragState`. All written only by
the dead vertex-drag handlers and read only by the dead
`clear*BoundaryInteraction` callbacks and `transientFloorplanFit`
checks (which collapse to `false` once their inputs are gone).
- 5 dead `useRef` mirrors of the above (`slabBoundaryDraftRef` etc.)
plus their mirror `useEffect` writes.
- 5 dead `clear*BoundaryInteraction` callbacks (slab, slabHole,
ceiling, ceilingHole, zone) — only called by deleted useEffects
and by `clearDraft`, where the call became a no-op.
- 7 dead `useEffect` watchers for `slabVertexDragState`,
`ceilingVertexDragState`, `slabHoleVertexDragState`,
`slabHoleMoveDraft`, `ceilingHoleVertexDragState`,
`ceilingHoleMoveDraft`, `zoneVertexDragState` (each early-returns
because state is always null, so all listener wiring + commit /
cancel paths inside were unreachable).
- 5 dead `shouldShow*BoundaryHandles` flags + the 5 `useEffect`s
that called `clear*BoundaryInteraction` when they flipped.
- `selectedSlabEditingHoleIndex` / `selectedSlabEditingHole` /
`selectedCeilingEditingHoleIndex` / `selectedCeilingEditingHole`
— derived from now-`null` selectedX entries.
- Dead drag-state guards in `handlePointerMove`, `handleSvgPointer
Move`, and the floor-plan fit `useMemo`.
- Dead top-level helpers: `getRaySegmentIntersection`,
`getSlabHandlePolygon`, `getSlabVisualOffsets`,
`getDraftSlabVisualPolygon`, `WallMeasurementFaceContext` type,
`getWallMeasurementFaceContext`, `getAdjacentOpeningBounds`,
`getSelectedWallMeasurementOverlays`,
`getItemDimensionMeasurementOverlays`, `polygonCentroid`.
Floor-plan panel: 10,466 → 9,006 lines (-1,460). Cumulative reduction
vs `main`: 17,913 → 9,006 (-8,907 lines, **~50%**).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
