fix: stabilize nested subgraph promoted widget resolution (#9282)

## Summary

Fix multiple issues with promoted widget resolution in nested subgraphs,
ensuring correct value propagation, slot matching, and rendering for
deeply nested promoted widgets.

## Changes

- **What**: Stabilize nested subgraph promoted widget resolution chain
- Use deep source keys for promoted widget values in Vue rendering mode
- Resolve effective widget options from the source widget instead of the
promoted view
  - Stabilize slot resolution for nested promoted widgets
  - Preserve combo value rendering for promoted subgraph widgets
- Prevent subgraph definition deletion while other nodes still reference
the same type
  - Clean up unused exported resolution types

## Review Focus

- `resolveConcretePromotedWidget.ts` — new recursive resolution logic
for deeply nested promoted widgets
- `useGraphNodeManager.ts` — option extraction now uses
`effectiveWidget` for promoted widgets
- `SubgraphNode.ts` — unpack no longer force-deletes definitions
referenced by other nodes

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9282-fix-stabilize-nested-subgraph-promoted-widget-resolution-3146d73d365081208a4fe931bb7569cf)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: GitHub Action <action@github.com>

src/components/graph/widgets/DomWidget.test.ts

@@ -0,0 +1,116 @@
+import { mount } from '@vue/test-utils'
+import { createTestingPinia } from '@pinia/testing'
+import { setActivePinia } from 'pinia'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { reactive } from 'vue'
+
+import { createMockLGraphNode } from '@/utils/__tests__/litegraphTestUtils'
+import type { BaseDOMWidget } from '@/scripts/domWidget'
+import type { DomWidgetState } from '@/stores/domWidgetStore'
+import { useDomWidgetStore } from '@/stores/domWidgetStore'
+
+import DomWidget from './DomWidget.vue'
+
+const mockUpdatePosition = vi.fn()
+const mockUpdateClipPath = vi.fn()
+const mockCanvasElement = document.createElement('canvas')
+const mockCanvasStore = {
+  canvas: {
+    graph: {
+      getNodeById: vi.fn(() => true)
+    },
+    ds: {
+      offset: [0, 0],
+      scale: 1
+    },
+    canvas: mockCanvasElement,
+    selected_nodes: {}
+  },
+  getCanvas: () => ({ canvas: mockCanvasElement }),
+  linearMode: false
+}
+
+vi.mock('@/composables/element/useAbsolutePosition', () => ({
+  useAbsolutePosition: () => ({
+    style: reactive<Record<string, string>>({}),
+    updatePosition: mockUpdatePosition
+  })
+}))
+
+vi.mock('@/composables/element/useDomClipping', () => ({
+  useDomClipping: () => ({
+    style: reactive<Record<string, string>>({}),
+    updateClipPath: mockUpdateClipPath
+  })
+}))
+
+vi.mock('@/renderer/core/canvas/canvasStore', () => ({
+  useCanvasStore: () => mockCanvasStore
+}))
+
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: () => ({
+    get: vi.fn(() => false)
+  })
+}))
+
+function createWidgetState(overrideDisabled: boolean): DomWidgetState {
+  const domWidgetStore = useDomWidgetStore()
+  const node = createMockLGraphNode({
+    id: 1,
+    constructor: {
+      nodeData: {}
+    }
+  })
+
+  const widget = {
+    id: 'dom-widget-id',
+    name: 'test_widget',
+    type: 'custom',
+    value: '',
+    options: {},
+    node,
+    computedDisabled: false
+  } as unknown as BaseDOMWidget<object | string>
+
+  domWidgetStore.registerWidget(widget)
+  domWidgetStore.setPositionOverride(widget.id, {
+    node: createMockLGraphNode({ id: 2 }),
+    widget: { computedDisabled: overrideDisabled } as DomWidgetState['widget']
+  })
+
+  const state = domWidgetStore.widgetStates.get(widget.id)
+  if (!state) throw new Error('Expected registered DomWidgetState')
+
+  state.zIndex = 2
+  state.size = [100, 40]
+
+  return reactive(state)
+}
+
+describe('DomWidget disabled style', () => {
+  beforeEach(() => {
+    setActivePinia(createTestingPinia({ stubActions: false }))
+  })
+
+  afterEach(() => {
+    useDomWidgetStore().clear()
+    vi.clearAllMocks()
+  })
+
+  it('uses disabled style when promoted override widget is computedDisabled', async () => {
+    const widgetState = createWidgetState(true)
+    const wrapper = mount(DomWidget, {
+      props: {
+        widgetState
+      }
+    })
+
+    widgetState.zIndex = 3
+    await wrapper.vm.$nextTick()
+
+    const root = wrapper.get('.dom-widget').element as HTMLElement
+    expect(root.style.pointerEvents).toBe('none')
+    expect(root.style.opacity).toBe('0.5')
+  })
+})

src/components/graph/widgets/DomWidget.vue

@@ -110,13 +110,17 @@ watch(
       updateDomClipping()
     }
 
+    const override = widgetState.positionOverride
+    const isDisabled = override
+      ? (override.widget.computedDisabled ?? widget.computedDisabled)
+      : widget.computedDisabled
+
     style.value = {
       ...positionStyle.value,
       ...(enableDomClipping.value ? clippingStyle.value : {}),
       zIndex: widgetState.zIndex,
-      pointerEvents:
-        widgetState.readonly || widget.computedDisabled ? 'none' : 'auto',
-      opacity: widget.computedDisabled ? 0.5 : 1
+      pointerEvents: widgetState.readonly || isDisabled ? 'none' : 'auto',
+      opacity: isDisabled ? 0.5 : 1
     }
   },
   { deep: true }