editor: add resize SFX triggered while dragging resize handles

Register a `resize` sound effect (three round-robin variations with
pitch/pan jitter and an 80ms gap) and emit it from the linear/radial
resize drag handler whenever the snapped+clamped value steps, so width /
length / depth / radius / height drags tick as the size changes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/editor/src/components/editor/node-arrow-handles.tsx

@@ -668,6 +668,11 @@ function LinearArrow({
               ? 1
               : -1
 
+      // Last value an emitted resize tick fired at — a new tick fires only
+      // when the (snapped + clamped) value actually changes, so the cue
+      // tracks real size steps instead of every sub-pixel pointer jitter.
+      let lastTickValue = initialValue
+
       return {
         overrideId,
         onBegin: () => {
@@ -695,6 +700,10 @@ function LinearArrow({
               ? snapScalar(rawNext, gridSnapStep)
               : rawNext
           const next = Math.min(maxBound, Math.max(minBound, snappedNext))
+          if (next !== lastTickValue) {
+            lastTickValue = next
+            sfxEmitter.emit('sfx:resize')
+          }
           const patch = descriptor.apply(initialNode as never, next, sceneApi) as Partial<AnyNode>
           // Let the kind publish live guides for the edge being resized.
           onDrag?.({ ...(initialNode as object), ...patch } as AnyNode, sceneApi)

packages/editor/src/lib/sfx-bus.ts

@@ -10,6 +10,7 @@ type SFXEvents = {
   'sfx:item-pick': undefined
   'sfx:item-place': undefined
   'sfx:item-rotate': undefined
+  'sfx:resize': undefined
   'sfx:structure-build-start': undefined
   'sfx:structure-build': undefined
   'sfx:structure-delete': undefined
@@ -40,6 +41,7 @@ export function initSFXBus() {
   sfxEmitter.on('sfx:item-pick', () => playSFX('itemPick'))
   sfxEmitter.on('sfx:item-place', () => playSFX('itemPlace'))
   sfxEmitter.on('sfx:item-rotate', () => playSFX('itemRotate'))
+  sfxEmitter.on('sfx:resize', () => playSFX('resize'))
   sfxEmitter.on('sfx:structure-build-start', () => playSFX('structureBuildStart'))
   sfxEmitter.on('sfx:structure-build', () => playSFX('structureBuildEnd'))
   sfxEmitter.on('sfx:structure-delete', () => playSFX('structureDelete'))

packages/editor/src/lib/sfx-player.ts

@@ -59,6 +59,16 @@ export const SFX: Record<string, SFXConfig> = {
     volumeRange: [0.92, 1.0],
     panJitter: 0.15,
   },
+  // Ticks as a resize handle is dragged across snap steps. Fires in rapid
+  // succession, so it mirrors gridSnap: three variations cycled round-robin
+  // with pitch/pan jitter and a gap so the run reads as texture, not a tone.
+  resize: {
+    src: ['/audios/sfx/resize_0.mp3', '/audios/sfx/resize_1.mp3', '/audios/sfx/resize_2.mp3'],
+    rateRange: [0.98, 1.02],
+    volumeRange: [0.26, 0.34],
+    panJitter: 0.15,
+    minIntervalMs: 80,
+  },
   // Fired when a structure draft begins (first click of a wall/slab/etc).
   structureBuildStart: {
     src: '/audios/sfx/structure_build_start.mp3',