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…l handler - Extract Mode B measurement subsystem to measurement.ts (ResizeObserver, scroll correction, content size deferral, stayAtEnd) - Extract public API assembly to api.ts (data wrappers, scroll methods, event subscription, destroy teardown) - Simplify wheel handler: delegate to onScrollFrame instead of reimplementing scroll logic (fixes missing velocity:change and afterScroll events during wheel scroll) - Add re-entry guard in onScrollFrame to skip redundant native scroll events after programmatic scrollTop assignment - Deduplicate idle timeout handler (onScrollIdle + scheduleIdle) - Deduplicate click/dblclick traversal (findClickTarget) - Use positional params + short property keys for minification core.ts: 1513 → 1097 lines (-28%) Base minified: 24.1 → 23.6 KB (-0.5 KB) Base gzipped: 8.7 → 8.8 KB (+0.1 KB) Tests: 2763/2763 pass, typecheck clean
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No public API changes. Drop-in replacement.