Phase 5 Stage D: re-port curve + whole-item move tools 1:1 from legacy

Each tool is now a direct copy of the legacy implementation, relocated
under @pascal-app/nodes/<kind>/ and dispatched via the registry's
def.affordanceTools. No DragAction abstraction, no clever live-drag
exception, no novel snap pipeline — same code, same UX, same
performance, same history dance.

Ports:
- fence/curve-tool.tsx    (legacy CurveFenceTool, 1:1)
- fence/move-tool.tsx     (legacy MoveFenceTool, 1:1 — including
                           the mesh.position + useLiveTransforms
                           exception that the legacy uses for fence
                           specifically)
- wall/curve-tool.tsx     (legacy CurveWallTool, 1:1)
- slab/move-tool.tsx      (legacy MoveSlabTool, 1:1)
- ceiling/move-tool.tsx   (legacy MoveCeilingTool, 1:1 — preview
                           fill + outline overlay preserved)

Drops the obsolete DragAction-based action files
(packages/nodes/src/{fence,wall,slab,ceiling}/actions/{curve,move}.ts)
and their now-empty actions/ directories where applicable. Fence
keeps actions/move-endpoint.ts since that port works.

Editor public surface gains `getWallGridStep` + `snapScalarToGrid`
(transitional exports — Stage F moves them into @pascal-app/nodes).

ToolManager + MoveTool dispatch unchanged: the same legacy-fallback
branches now mount the registry component because the affordances are
declared, but the rendered behavior matches the legacy because the
implementations are copies.

Per-kind progress: fence D ✅ (curve / move-endpoint / move / placement
all kind-owned), slab D ✅, ceiling D ✅, wall D 🟡 (curve only,
endpoint/move/placement still legacy).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/nodes/src/ceiling/definition.ts

@@ -58,12 +58,13 @@ export const ceilingDefinition: NodeDefinition<typeof CeilingNode> = {
   // with a vertical TSL-gradient connector + ground-shadow lines.
   tool: () => import('./tool'),
 
-  // Stage D — boundary + hole editors ported. Whole-ceiling move kept
-  // on the legacy MoveCeilingTool for the same reason as slab (live-
-  // drag mesh.position one-frame teleport on commit).
+  // Stage D — all four ceiling drag-affordances live in this folder.
+  // 1:1 port of the legacy tools (scene.update per tick + history
+  // dance + preview fill/outline overlay on move).
   affordanceTools: {
     'boundary-edit': () => import('./boundary-editor'),
     'hole-edit': () => import('./hole-editor'),
+    move: () => import('./move-tool'),
   },
 
   renderer: {