Fix: Persist Size across Collapsing Vue Nodes (#6726)

## Summary

When restoring a collapsed node, return to the uncollapsed size.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6726-Fix-Persist-Size-across-Collapsing-Vue-Nodes-2ae6d73d365081e28628d5640bc35ab3)
by [Unito](https://www.unito.io)

Author: DrJKL

src/renderer/extensions/vueNodes/components/LGraphNode.vue

@@ -135,9 +135,8 @@
 </template>
 
 <script setup lang="ts">
-import { whenever } from '@vueuse/core'
 import { storeToRefs } from 'pinia'
-import { computed, inject, onErrorCaptured, onMounted, ref } from 'vue'
+import { computed, inject, onErrorCaptured, onMounted, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import type { VueNodeData } from '@/composables/graph/useGraphNodeManager'
@@ -373,11 +372,17 @@ const handleResizePointerDown = (direction: ResizeHandleDirection) => {
   }
 }
 
-whenever(isCollapsed, () => {
+watch(isCollapsed, (collapsed) => {
   const element = nodeContainerRef.value
   if (!element) return
-  element.style.setProperty('--node-width', '')
-  element.style.setProperty('--node-height', '')
+  const [from, to] = collapsed ? ['', '-x'] : ['-x', '']
+  const currentWidth = element.style.getPropertyValue(`--node-width${from}`)
+  element.style.setProperty(`--node-width${to}`, currentWidth)
+  element.style.setProperty(`--node-width${from}`, '')
+
+  const currentHeight = element.style.getPropertyValue(`--node-height${from}`)
+  element.style.setProperty(`--node-height${to}`, currentHeight)
+  element.style.setProperty(`--node-height${from}`, '')
 })
 
 // Check if node has custom content (like image/video outputs)