fix: attribute batched layout operations to their real source

batchMoveNodes stamped every operation Vue regardless of the mutations
instance it came from, and the paste path passed Vue by hand, so arrange
and paste reported themselves as Vue-originated. LGraphNode.vue skips
its CSS-var rewrite for Vue-sourced changes, so both paths silently
opted out of it.

Author: DrJKL

src/lib/litegraph/src/LGraphCanvas.ts

@@ -4370,7 +4370,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
     const rootGraphId = graph.rootGraph.id
     layoutStore.batchUpdateNodeBounds(rootGraphId, newPositions, {
-      source: LayoutSource.Vue
+      source: LayoutSource.Canvas
     })
 
     // Bring cloned/pasted nodes to front so they render above the originals

src/renderer/core/layout/operations/layoutMutations.test.ts

@@ -239,6 +239,19 @@ describe('batchMoveNodes', () => {
       }
     )
   })
+
+  it('reports the source it was built with, not the batch transport', async () => {
+    const sources: LayoutSource[] = []
+    const stop = layoutStore.onChange(({ source }) => sources.push(source))
+    onTestFinished(stop)
+
+    useLayoutMutations(LayoutSource.Canvas).batchMoveNodes(GRAPH, [
+      { nodeId: NODE_1, position: { x: 50, y: 60 } }
+    ])
+    await vi.waitFor(() => expect(sources).not.toHaveLength(0))
+
+    expect(sources).toEqual([LayoutSource.Canvas])
+  })
 })
 
 describe('bringNodeToFront', () => {

src/renderer/core/layout/operations/layoutMutations.ts

@@ -11,10 +11,10 @@ import type { NodeId } from '@/types/nodeId'
 import type { UUID } from '@/utils/uuid'
 import { layoutStore } from '@/renderer/core/layout/store/layoutStore'
 import type { GroupId } from '@/types/groupId'
-import { LayoutSource } from '@/renderer/core/layout/types'
 import type {
   GroupLayout,
   LayoutOperationResult,
+  LayoutSource,
   NodeLayout,
   Point,
   RerouteId,
@@ -133,7 +133,7 @@ export function useLayoutMutations(source: LayoutSource): LayoutMutations {
 
     if (nodeBoundsUpdates.length === 0) return
     layoutStore.batchUpdateNodeBounds(rootGraphId, nodeBoundsUpdates, {
-      source: LayoutSource.Vue
+      source
     })
   }