perf: add gpu hint and transform settle to prevent rasterizing while zooming (scale transform) (#7417)

## Summary

Ensures the nodes get their own compositing layers during scale
transform (tracked via mouse wheel events), which prevents rasterization
during transform. Adds forced reflow at end of transform to ensure
layers are always at correct resolution (fixes blurriness and some
readability issues).

Videos show testing this branch first then testing main - doing layer
visualization, paint (include paint operations calculations and actual
raster) visualizations, and cpu usage monitoring.


https://github.com/user-attachments/assets/c5fab219-0b32-4822-9238-c4572f0d6a44



https://github.com/user-attachments/assets/7e172e8d-cc5b-4dcd-aa07-1dfc3eb65bac

packages/design-system/src/css/style.css

@@ -1328,6 +1328,15 @@ audio.comfy-audio.empty-audio-widget {
     font-size 0.1s ease;
 }
 
+/* Performance optimization during canvas interaction */
+.transform-pane--interacting .lg-node * {
+  transition: none !important;
+}
+
+.transform-pane--interacting .lg-node {
+  will-change: transform;
+}
+
 /* ===================== Mask Editor Styles ===================== */
 /* To be migrated to Tailwind later */
   #maskEditor_brush {