Make Vue nodes read-only when in panning mode (#5574)

## Summary

Integrated Vue node components with canvas panning mode to prevent UI
interference during navigation.

## Changes

- **What**: Added
[canCapturePointerEvents](https://docs.comfy.org/guide/vue-nodes)
computed property to `useCanvasInteractions` composable that checks
canvas read-only state
- **What**: Modified Vue node components (LGraphNode, NodeWidgets) to
conditionally handle pointer events based on canvas navigation mode
- **What**: Updated node event handlers to respect panning mode and
forward events to canvas when appropriate

## Review Focus

Event forwarding logic in panning mode and pointer event capture state
management across Vue node hierarchy.

```mermaid
graph TD
    A[User Interaction] --> B{Canvas in Panning Mode?}
    B -->|Yes| C[Forward to Canvas]
    B -->|No| D[Handle in Vue Component]
    C --> E[Canvas Navigation]
    D --> F[Node Selection/Widget Interaction]

    G[canCapturePointerEvents] --> H{read_only === false}
    H -->|Yes| I[Allow Vue Events]
    H -->|No| J[Block Vue Events]

    style A fill:#f9f9f9,stroke:#333,color:#000
    style E fill:#f9f9f9,stroke:#333,color:#000
    style F fill:#f9f9f9,stroke:#333,color:#000
    style I fill:#e1f5fe,stroke:#01579b,color:#000
    style J fill:#ffebee,stroke:#c62828,color:#000
```

## Screenshots




https://github.com/user-attachments/assets/00dc5e4a-2b56-43be-b92e-eaf511e52542

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5574-Make-Vue-nodes-read-only-when-in-panning-mode-26f6d73d3650818c951cd82c8fe58972)
by [Unito](https://www.unito.io)

---------

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

src/components/graph/GraphCanvas.vue

@@ -96,7 +96,6 @@ import NodeSearchboxPopover from '@/components/searchbox/NodeSearchBoxPopover.vu
 import SideToolbar from '@/components/sidebar/SideToolbar.vue'
 import SecondRowWorkflowTabs from '@/components/topbar/SecondRowWorkflowTabs.vue'
 import { useChainCallback } from '@/composables/functional/useChainCallback'
-import { useCanvasInteractions } from '@/composables/graph/useCanvasInteractions'
 import { useViewportCulling } from '@/composables/graph/useViewportCulling'
 import { useVueNodeLifecycle } from '@/composables/graph/useVueNodeLifecycle'
 import { useNodeBadge } from '@/composables/node/useNodeBadge'
@@ -118,6 +117,7 @@ import { useWorkflowAutoSave } from '@/platform/workflow/persistence/composables
 import { useWorkflowPersistence } from '@/platform/workflow/persistence/composables/useWorkflowPersistence'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { SelectedNodeIdsKey } from '@/renderer/core/canvas/injectionKeys'
+import { useCanvasInteractions } from '@/renderer/core/canvas/useCanvasInteractions'
 import TransformPane from '@/renderer/core/layout/transform/TransformPane.vue'
 import MiniMap from '@/renderer/extensions/minimap/MiniMap.vue'
 import VueGraphNode from '@/renderer/extensions/vueNodes/components/LGraphNode.vue'

src/components/graph/GraphCanvasMenu.vue

@@ -124,11 +124,11 @@ import ButtonGroup from 'primevue/buttongroup'
 import { computed, onBeforeUnmount, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 
-import { useCanvasInteractions } from '@/composables/graph/useCanvasInteractions'
 import { useZoomControls } from '@/composables/useZoomControls'
 import { LiteGraph } from '@/lib/litegraph/src/litegraph'
 import { useSettingStore } from '@/platform/settings/settingStore'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { useCanvasInteractions } from '@/renderer/core/canvas/useCanvasInteractions'
 import { useMinimap } from '@/renderer/extensions/minimap/composables/useMinimap'
 import { useCommandStore } from '@/stores/commandStore'
 import { useWorkspaceStore } from '@/stores/workspaceStore'

src/components/graph/SelectionToolbox.spec.ts

@@ -5,12 +5,12 @@ import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { createI18n } from 'vue-i18n'
 
 import SelectionToolbox from '@/components/graph/SelectionToolbox.vue'
-import { useCanvasInteractions } from '@/composables/graph/useCanvasInteractions'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { useCanvasInteractions } from '@/renderer/core/canvas/useCanvasInteractions'
 import { useExtensionService } from '@/services/extensionService'
 
 // Mock the composables and services
-vi.mock('@/composables/graph/useCanvasInteractions', () => ({
+vi.mock('@/renderer/core/canvas/useCanvasInteractions', () => ({
   useCanvasInteractions: vi.fn(() => ({
     handleWheel: vi.fn()
   }))

src/components/graph/SelectionToolbox.vue

@@ -60,9 +60,9 @@ import MaskEditorButton from '@/components/graph/selectionToolbox/MaskEditorButt
 import RefreshSelectionButton from '@/components/graph/selectionToolbox/RefreshSelectionButton.vue'
 import PublishSubgraphButton from '@/components/graph/selectionToolbox/SaveToSubgraphLibrary.vue'
 import { useSelectionToolboxPosition } from '@/composables/canvas/useSelectionToolboxPosition'
-import { useCanvasInteractions } from '@/composables/graph/useCanvasInteractions'
 import { useSelectionState } from '@/composables/graph/useSelectionState'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { useCanvasInteractions } from '@/renderer/core/canvas/useCanvasInteractions'
 import { useMinimap } from '@/renderer/extensions/minimap/composables/useMinimap'
 import { useExtensionService } from '@/services/extensionService'
 import { type ComfyCommandImpl, useCommandStore } from '@/stores/commandStore'