Follow-up to #3587909: Fix vh-unit detection in useSyncIframeHeightToContent to force cross-frame layout reflow. Pinning vh-style blocks on iframe load can still fail when editing prop values for code components: canvas-island re-renders replace DOM and drop inline constraints until a full iframe swap, so the iframe height can spiral again.
Re-apply vh detection after <canvas-island> subtree update and harden ratio logic for content taller than one viewport.
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Comment #3
lauriii