disable transform settling reflow when panning the graph (#6186)

## Summary

- disable pan tracking in `useTransformSettling` so we stop wiring
high-frequency pointer listeners during canvas drags
- the post-navigation-interaction forced reflow is only necessary when
zooming since it is for fixing pixel stretch that results from `scale`
(which doesn't happen during panning/`translate`)
- extend settle delay to 512ms to reduce unnecessary reflow while
preserving post-zoom pixel fix

After this PR, there should be 0 reflows when panning the graph.

First PR in series to address:

- https://github.com/Comfy-Org/ComfyUI_frontend/issues/6151

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6186-disable-transform-settling-reflow-when-panning-the-graph-2936d73d365081c2b357e3c72d711439)
by [Unito](https://www.unito.io)

---------

Co-authored-by: DrJKL <DrJKL@users.noreply.github.com>

src/renderer/extensions/vueNodes/composables/useNodePointerInteractions.test.ts

@@ -1,3 +1,4 @@
+import { createPinia, setActivePinia } from 'pinia'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { nextTick, ref } from 'vue'
 
@@ -71,6 +72,7 @@ const createMouseEvent = (
 describe('useNodePointerInteractions', () => {
   beforeEach(async () => {
     vi.clearAllMocks()
+    setActivePinia(createPinia())
     // Reset layout store state between tests
     const { layoutStore } = await import(
       '@/renderer/core/layout/store/layoutStore'