[backport core/1.38] fix: add Frame Nodes to core menu items for multi-selection context menu (#8553)

Backport of #8524 to `core/1.38`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8553-backport-core-1-38-fix-add-Frame-Nodes-to-core-menu-items-for-multi-selection-context--2fc6d73d36508188be6be38de9df2ba0)
by [Unito](https://www.unito.io)

Co-authored-by: Christian Byrne <cbyrne@comfy.org>
Co-authored-by: Amp <amp@ampcode.com>

src/composables/graph/contextMenuConverter.test.ts

@@ -134,6 +134,27 @@ describe('contextMenuConverter', () => {
       // Node Info (section 4) should come before or with Color (section 4)
       expect(getIndex('Node Info')).toBeLessThanOrEqual(getIndex('Color'))
     })
+
+    it('should recognize Frame Nodes as a core menu item', () => {
+      const options: MenuOption[] = [
+        { label: 'Rename', source: 'vue' },
+        { label: 'Frame Nodes', source: 'vue' },
+        { label: 'Custom Extension', source: 'vue' }
+      ]
+
+      const result = buildStructuredMenu(options)
+
+      // Frame Nodes should appear in the core items section (before Extensions)
+      const frameNodesIndex = result.findIndex(
+        (opt) => opt.label === 'Frame Nodes'
+      )
+      const extensionsCategoryIndex = result.findIndex(
+        (opt) => opt.label === 'Extensions' && opt.type === 'category'
+      )
+
+      // Frame Nodes should come before Extensions category
+      expect(frameNodesIndex).toBeLessThan(extensionsCategoryIndex)
+    })
   })
 
   describe('convertContextMenuToOptions', () => {