Frontend: - Cursor pagination (100/page) replacing hardcoded 80 message limit - Removed .slice(0,200) cap on mergeMessages - IntersectionObserver infinite scroll with skeleton loading - 15s periodic refetch for message list sync Backend: - Removed LIMIT 2000 from topic trends SQL query - Added invalidateAnalyticsCache on message capture (messageCreated) - Added invalidateAnalyticsCache on batch analysis completion Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>