fix(studio): address review findings on graded-element editing

Review follow-ups (both reviewers, all findings):

- resize captures scope to the resize group: convert-to-keyframes
  resolvedFromValues and the whole-offset backfill pass the group filter,
  so an opacity-touching intro tween can't ride into a converted scale
  tween (the rotation fix's contract, now uniform across intercepts)
- commitStaticSet resolves every group's target set BEFORE committing and
  coalesces groups landing on the same legacy mixed set into one commit —
  the second commit can no longer chase a stale group-derived id
- installAuthoredOpacityCapture also stamps an element the moment it GAINS
  data-color-grading at runtime (attributeFilter), not just at insertion
- both writer twins now share the same emitted-set dedupe shape
- applySoftReload's positional tail becomes a SoftReloadOptions object
- readAllAnimatedProperties builds the group-filtered key set immutably
  instead of deleting from the set mid-iteration
- applyAuthoredInlineOpacity documents the priority-lossy round-trip
- the marquee hit-test reads activeCompositionPathRef like its neighbors

New tests: resize intercept (scale route + group filter + non-uniform
longhands), after-write-HTML / stamp / empty-stamp opacity restore, the
no-op-commit-with-missed-instant-patch soft-reload contract, and the
runtime-gained-grading stamp.

packages/studio/src/components/editor/DomEditOverlay.tsx

@@ -315,7 +315,12 @@ export const DomEditOverlay = memo(function DomEditOverlay({
     if (!hoverSelectionRef.current && onMarqueeSelectRef.current && compRect.width > 0) {
       const iframe = iframeRef.current;
       const freshTarget = iframe
-        ? getPreviewTargetFromPointer(iframe, event.clientX, event.clientY, activeCompositionPath)
+        ? getPreviewTargetFromPointer(
+            iframe,
+            event.clientX,
+            event.clientY,
+            activeCompositionPathRef.current,
+          )
         : null;
       if (freshTarget) return;
       const overlayEl = overlayRef.current;