Feat/vue nodes try it now banner (#6362)

## Summary

Banner to try vue nodes. Clicking try it now will flip
shouldRenderVueNodes = true.

## Screenshots (if applicable)

<img width="1512" height="824" alt="image"
src="https://github.com/user-attachments/assets/dfd4bdc3-6753-45ee-86f1-ed7dc077f868"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6362-Feat-vue-nodes-try-it-now-banner-29b6d73d365081c29f04f9126f06ee9d)
by [Unito](https://www.unito.io)

src/components/graph/GraphCanvas.vue

@@ -3,8 +3,10 @@
   <!-- If load immediately, the top-level splitter stateKey won't be correctly
   synced with the stateStorage (localStorage). -->
   <LiteGraphCanvasSplitterOverlay v-if="comfyAppReady">
-    <template v-if="showUI && workflowTabsPosition === 'Topbar'" #workflow-tabs>
+    <template v-if="showUI" #workflow-tabs>
+      <TryVueNodeBanner />
       <div
+        v-if="workflowTabsPosition === 'Topbar'"
         class="workflow-tabs-container pointer-events-auto relative h-9.5 w-full"
       >
         <!-- Native drag area for Electron -->
@@ -152,6 +154,8 @@ import { useSearchBoxStore } from '@/stores/workspace/searchBoxStore'
 import { useWorkspaceStore } from '@/stores/workspaceStore'
 import { isNativeWindow } from '@/utils/envUtil'
 
+import TryVueNodeBanner from '../topbar/TryVueNodeBanner.vue'
+
 const emit = defineEmits<{
   ready: []
 }>()