feat: show ComfyUI context menu on textarea widget right-click (#9840)

## Summary

Right-clicking a textarea widget (e.g. text node) shows the browser's
native context menu instead of ComfyUI's context menu, preventing access
to promote/un-promote options in subgraphs.

## Changes

- **What**: Replace `@contextmenu.capture.stop` on
`WidgetTextarea.vue`'s `<Textarea>` with a handler implementing
double-right-click toggling: first right-click shows ComfyUI's context
menu, second right-click (while menu is open) allows browser native
menu. Exposes `isNodeOptionsOpen()` from `useMoreOptionsMenu.ts` to
check menu state.

## Review Focus

The capture-phase handler in `WidgetTextarea.vue` only changes
`contextmenu` handling — pointer event modifiers
(`pointerdown/move/up.capture.stop`) that prevent canvas panning are
untouched. The double-right-click pattern matches Notion/YouTube
behavior for editable text fields.

<!-- Pipeline-Ticket: d7a53160-e1e1-42bb-a5ac-c0c2702c629c -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9840-fix-show-ComfyUI-context-menu-on-textarea-widget-right-click-3216d73d36508102b4c9c13a5915bc48)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Alexander Brown <drjkl@comfy.org>

src/composables/graph/useMoreOptionsMenu.ts

@@ -80,8 +80,12 @@ export function showNodeOptions(
 }
 
 /**
- * Hide the node options popover
+ * Check if the node options menu is currently open
  */
+export function isNodeOptionsOpen(): boolean {
+  return nodeOptionsInstance?.isOpen.value ?? false
+}
+
 interface NodeOptionsInstance {
   toggle: (event: Event) => void
   show: (event: MouseEvent) => void

src/renderer/extensions/vueNodes/widgets/components/WidgetTextarea.test.ts

@@ -7,6 +7,7 @@ import WidgetTextarea from './WidgetTextarea.vue'
 import { createMockWidget } from './widgetTestUtils'
 
 const mockCopyToClipboard = vi.hoisted(() => vi.fn())
+const mockIsNodeOptionsOpen = vi.hoisted(() => vi.fn(() => false))
 
 vi.mock('@/composables/useCopyToClipboard', () => ({
   useCopyToClipboard: vi.fn().mockReturnValue({
@@ -14,6 +15,10 @@ vi.mock('@/composables/useCopyToClipboard', () => ({
   })
 }))
 
+vi.mock('@/composables/graph/useMoreOptionsMenu', () => ({
+  isNodeOptionsOpen: mockIsNodeOptionsOpen
+}))
+
 function createTextareaWidget(
   value: string = 'default text',
   options: SimplifiedWidget<string>['options'] = {},
@@ -277,3 +282,43 @@ describe('WidgetTextarea Value Binding', () => {
     })
   })
 })
+
+describe('WidgetTextarea contextmenu', () => {
+  it('prevents browser menu on first right-click (menu closed)', () => {
+    mockIsNodeOptionsOpen.mockReturnValue(false)
+    const widget = createTextareaWidget('test')
+    const wrapper = mountComponent(widget, 'test')
+    const textarea = wrapper.find('textarea')
+
+    const event = new MouseEvent('contextmenu', {
+      bubbles: true,
+      cancelable: true
+    })
+    const preventDefaultSpy = vi.spyOn(event, 'preventDefault')
+    const stopPropagationSpy = vi.spyOn(event, 'stopPropagation')
+
+    textarea.element.dispatchEvent(event)
+
+    expect(preventDefaultSpy).toHaveBeenCalled()
+    expect(stopPropagationSpy).not.toHaveBeenCalled()
+  })
+
+  it('allows browser menu on second right-click (menu open)', () => {
+    mockIsNodeOptionsOpen.mockReturnValue(true)
+    const widget = createTextareaWidget('test')
+    const wrapper = mountComponent(widget, 'test')
+    const textarea = wrapper.find('textarea')
+
+    const event = new MouseEvent('contextmenu', {
+      bubbles: true,
+      cancelable: true
+    })
+    const preventDefaultSpy = vi.spyOn(event, 'preventDefault')
+    const stopPropagationSpy = vi.spyOn(event, 'stopPropagation')
+
+    textarea.element.dispatchEvent(event)
+
+    expect(preventDefaultSpy).not.toHaveBeenCalled()
+    expect(stopPropagationSpy).toHaveBeenCalled()
+  })
+})

src/renderer/extensions/vueNodes/widgets/components/WidgetTextarea.vue

@@ -31,7 +31,7 @@
       @pointerdown.capture.stop
       @pointermove.capture.stop
       @pointerup.capture.stop
-      @contextmenu.capture.stop
+      @contextmenu.capture="handleContextMenu"
     />
     <Button
       v-if="isReadOnly"
@@ -54,6 +54,7 @@ import { computed, useId } from 'vue'
 import Button from '@/components/ui/button/Button.vue'
 import Textarea from '@/components/ui/textarea/Textarea.vue'
 import { useCopyToClipboard } from '@/composables/useCopyToClipboard'
+import { isNodeOptionsOpen } from '@/composables/graph/useMoreOptionsMenu'
 import type { SimplifiedWidget } from '@/types/simplifiedWidget'
 import { useHideLayoutField } from '@/types/widgetTypes'
 import { cn } from '@/utils/tailwindUtil'
@@ -85,6 +86,14 @@ const isReadOnly = computed(() =>
   Boolean(widget.options?.read_only || widget.options?.disabled)
 )
 
+function handleContextMenu(e: MouseEvent) {
+  if (isNodeOptionsOpen()) {
+    e.stopPropagation()
+    return
+  }
+  e.preventDefault()
+}
+
 function handleCopy() {
   copyToClipboard(modelValue.value)
 }