The chart's layout effect ran after every render (no deps), so any
hover/select re-render near the right edge re-ran the stick-to-end
check — and by the time it read el.scrollWidth the value was already
the post-append width, which could misfire the anchor. The effect now
runs only when granularity, focusTurn, or the request list changes,
and the near-end check compares against the PREVIOUS pass's scrollWidth
(kept in a ref), so a reader near the right edge still follows an
appended bar while a mid-chart reader is never yanked back, and a
hover/select render never touches the scroll at all.
bowenliang123
01d16bbcf0