Refactor: Composable disentangling (#5695)

## Summary

Prerequisite refactor/cleanup to use a global store instead of having
nodes throw up events to a parent component that stores a reference to a
singleton service that itself bootstraps and synchronizes with a
separate service to maintain a partially reactive but not fully reactive
set of states that describe some but not all aspects of the nodes on
either the litegraph, the vue side, or both.

## Changes

- **What**: Refactoring, the behavior should not change.
- **Dependencies**: A type utility to help with Vue component props

## Review Focus

Is there something about the current structure that this could affect
that would not be caught by our tests or using the application?

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5695-Refactor-Composable-disentangling-2746d73d365081e6938ce656932f3e36)
by [Unito](https://www.unito.io)

src/renderer/extensions/vueNodes/layout/useNodeLayout.ts

@@ -1,3 +1,4 @@
+import { storeToRefs } from 'pinia'
 /**
  * Composable for individual Vue node components
  *
@@ -6,7 +7,7 @@
  */
 import { computed, inject } from 'vue'
 
-import { SelectedNodeIdsKey } from '@/renderer/core/canvas/injectionKeys'
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { TransformStateKey } from '@/renderer/core/layout/injectionKeys'
 import { useLayoutMutations } from '@/renderer/core/layout/operations/layoutMutations'
 import { layoutStore } from '@/renderer/core/layout/store/layoutStore'
@@ -17,14 +18,14 @@ import { LayoutSource, type Point } from '@/renderer/core/layout/types'
  * Uses customRef for shared write access with Canvas renderer
  */
 export function useNodeLayout(nodeId: string) {
-  const store = layoutStore
   const mutations = useLayoutMutations()
+  const { selectedNodeIds } = storeToRefs(useCanvasStore())
 
   // Get transform utilities from TransformPane if available
   const transformState = inject(TransformStateKey)
 
   // Get the customRef for this node (shared write access)
-  const layoutRef = store.getNodeLayoutRef(nodeId)
+  const layoutRef = layoutStore.getNodeLayoutRef(nodeId)
 
   // Computed properties for easy access
   const position = computed(() => {
@@ -53,8 +54,6 @@ export function useNodeLayout(nodeId: string) {
   let dragStartMouse: Point | null = null
   let otherSelectedNodesStartPositions: Map<string, Point> | null = null
 
-  const selectedNodeIds = inject(SelectedNodeIdsKey, null)
-
   /**
    * Start dragging the node
    */