Fix linear mode with vue (#6769)

Previously, entering linear mode from vue mode would cause all nodes to
be set to position 0.

This is fixed by ignoring resize updates with a contentRect of all 0s

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6769-Fix-linear-mode-with-vue-2b16d73d36508188964bcfb8b465dcb1)
by [Unito](https://www.unito.io)

src/renderer/extensions/vueNodes/composables/useVueNodeResizeTracking.ts

@@ -14,6 +14,7 @@ import type { MaybeRefOrGetter } from 'vue'
 import { useSharedCanvasPositionConversion } from '@/composables/element/useCanvasPositionConversion'
 import { LiteGraph } from '@/lib/litegraph/src/litegraph'
 import { layoutStore } from '@/renderer/core/layout/store/layoutStore'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import type { Bounds, NodeId } from '@/renderer/core/layout/types'
 import { LayoutSource } from '@/renderer/core/layout/types'
 
@@ -60,6 +61,7 @@ const trackingConfigs: Map<string, ElementTrackingConfig> = new Map([
 
 // Single ResizeObserver instance for all Vue elements
 const resizeObserver = new ResizeObserver((entries) => {
+  if (useCanvasStore().linearMode) return
   // Canvas is ready when this code runs; no defensive guards needed.
   const conv = useSharedCanvasPositionConversion()
   // Group updates by type, then flush via each config's handler