fix(editor): harden editor interactions and WebGPU rendering

Fix editor bug sweep regressions, WebGPU CSG/material crashes, Shift snap bypass behavior, arrow handle drag projection, and the wall preview null guard covered by the Sentry follow-up PRs.

packages/nodes/src/column/tool.tsx

@@ -87,7 +87,8 @@ const ColumnTool = () => {
         rawZ: event.localPosition[2],
         gridStep: useEditor.getState().gridSnapStep,
         candidates: alignmentCandidates,
-        bypassAlignment: event.nativeEvent?.altKey === true,
+        bypassAlignment: event.nativeEvent?.altKey === true || event.nativeEvent?.shiftKey === true,
+        bypassGrid: event.nativeEvent?.shiftKey === true,
       })
       useAlignmentGuides.getState().set(guides)
 
@@ -107,7 +108,10 @@ const ColumnTool = () => {
       usePlacementPreview.getState().set({ ...previewNode, position })
 
       const prev = previousSnapRef.current
-      if (!prev || prev[0] !== position[0] || prev[1] !== position[2]) {
+      if (
+        event.nativeEvent?.shiftKey !== true &&
+        (!prev || prev[0] !== position[0] || prev[1] !== position[2])
+      ) {
         triggerSFX('sfx:grid-snap')
         previousSnapRef.current = [position[0], position[2]]
       }
@@ -116,7 +120,12 @@ const ColumnTool = () => {
     const commitAtCursor = (event: FloorPlacementClickTriggerEvent) => {
       const position =
         lastCursorRef.current ??
-        getLevelLocalSnappedPosition(activeLevelId, event, useEditor.getState().gridSnapStep)
+        getLevelLocalSnappedPosition(
+          activeLevelId,
+          event,
+          useEditor.getState().gridSnapStep,
+          event.nativeEvent?.shiftKey === true,
+        )
 
       const column = createColumnFromPreset(DEFAULT_COLUMN_PRESET_ID, position)
       useScene.getState().createNode(column, activeLevelId)