[backport cloud/1.37] Fix dragging Vue nodes into canvas from library (#8346)

Backport of #8118 to `cloud/1.37`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8346-backport-cloud-1-37-Fix-dragging-Vue-nodes-into-canvas-from-library-2f66d73d3650816b804ae117a4674d53)
by [Unito](https://www.unito.io)

Co-authored-by: pythongosssss <125205205+pythongosssss@users.noreply.github.com>

src/components/sidebar/tabs/NodeLibrarySidebarTab.vue

@@ -139,7 +139,15 @@ import { storeToRefs } from 'pinia'
 import Divider from 'primevue/divider'
 import Popover from 'primevue/popover'
 import type { Ref } from 'vue'
-import { computed, h, nextTick, onMounted, ref, render } from 'vue'
+import {
+  computed,
+  getCurrentInstance,
+  h,
+  nextTick,
+  onMounted,
+  ref,
+  render
+} from 'vue'
 
 import SearchBox from '@/components/common/SearchBox.vue'
 import type { SearchFilter } from '@/components/common/SearchFilterChip.vue'
@@ -171,6 +179,8 @@ import type { FuseFilterWithValue } from '@/utils/fuseUtil'
 
 import NodeBookmarkTreeExplorer from './nodeLibrary/NodeBookmarkTreeExplorer.vue'
 
+const instance = getCurrentInstance()!
+const appContext = instance.appContext
 const nodeDefStore = useNodeDefStore()
 const nodeBookmarkStore = useNodeBookmarkStore()
 const nodeHelpStore = useNodeHelpStore()
@@ -272,6 +282,7 @@ const renderedRoot = computed<TreeExplorerNode<ComfyNodeDefImpl>>(() => {
       draggable: node.leaf,
       renderDragPreview(container) {
         const vnode = h(NodePreview, { nodeDef: node.data })
+        vnode.appContext = appContext
         render(vnode, container)
         return () => {
           render(null, container)

src/components/sidebar/tabs/nodeLibrary/NodeBookmarkTreeExplorer.vue

@@ -22,7 +22,15 @@
 </template>
 
 <script setup lang="ts">
-import { computed, h, nextTick, ref, render, watch } from 'vue'
+import {
+  computed,
+  getCurrentInstance,
+  h,
+  nextTick,
+  ref,
+  render,
+  watch
+} from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import FolderCustomizationDialog from '@/components/common/CustomizationDialog.vue'
@@ -41,6 +49,8 @@ import type {
   TreeNode
 } from '@/types/treeExplorerTypes'
 
+const instance = getCurrentInstance()!
+const appContext = instance.appContext
 const props = defineProps<{
   filteredNodeDefs: ComfyNodeDefImpl[]
   openNodeHelp: (nodeDef: ComfyNodeDefImpl) => void
@@ -154,6 +164,7 @@ const renderedBookmarkedRoot = computed<TreeExplorerNode<ComfyNodeDefImpl>>(
         },
         renderDragPreview(container) {
           const vnode = h(NodePreview, { nodeDef: node.data })
+          vnode.appContext = appContext
           render(vnode, container)
           return () => {
             render(null, container)