* Fix panel resize stuttering when tiled with browser panels (#1968)
During divider drag, the portal sync system was doing O(N²) work per
frame: each geometry callback synced ALL web views, and multiple
callbacks fired per layout pass (setFrameSize + setFrameOrigin + layout).
Two changes:
1. synchronizeWebViewForAnchor now only syncs the primary web view and
defers the all-sync. Each panel fires its own geometry callback, so
secondary syncs are redundant on the hot path.
2. HostContainerView.setFrameOrigin/setFrameSize use markGeometryDirtyIfNeeded
which defers the callback to layout(), coalescing 2-3 notifications
per frame into one. An async fallback ensures origin-only changes
(without a subsequent layout) are still delivered.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Fix premature geometryRevision increment in markGeometryDirtyIfNeeded
Address reviewer feedback (Greptile, CodeRabbit): geometryRevision and
lastReportedGeometryState are now only updated when the callback
actually fires, not eagerly. This prevents updateNSView from seeing a
premature revision delta and triggering a redundant synchronizeForAnchor
before the coalesced notification arrives.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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