onAppear doesn't fire during programmatic scrolling (UIScrollView
contentOffset changes don't trigger SwiftUI lifecycle). Added
onNearBottom callback to ScrollViewDriver — fires when within 500pt
of bottom during auto-scroll tick. 3s cooldown prevents rapid-fire.
Auto-scroll no longer stops at bottom — idles at maxOffset while
loadMore fetches. When new entries arrive, contentSize grows and
scrolling resumes automatically.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
1cfb729cae