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Waleed
2c1392e3a0
* fix(chat): align scrollbar/keyboard detach with wheel/touch re-engage threshold The onScroll detach branch set only stickyRef.current = false, leaving userDetachedRef false, so a scrollbar-drag or keyboard detach kept the lenient 30px (STICK_THRESHOLD) re-engage threshold instead of the strict 5px (REATTACH_THRESHOLD) used after wheel/touch. A programmatic virtualizer re-pin landing within 30px could then snap autoscroll back on right after the user deliberately scrolled away. Reuse the detach() helper so all detach paths set userDetachedRef consistently. * fix(chat): keep end-of-turn options in view after streaming When a stream ends, the suggested-follow-up options and the actions row (gated on !isStreaming) mount, but the virtualizer's getTotalSize — which drives the scroll container's scrollHeight — only catches up a frame or two later via its ResizeObserver. The single scrollToBottom() on effect teardown therefore landed on a stale, too-short bottom and the options were clipped behind the input. (Pre-virtualization this worked because scrollHeight reflected the new rows immediately.) Extract the rAF follow loop already used for CSS height animations into a shared followToBottom(window) helper and run it for a short settle window on teardown, so the bottom is chased until the virtualizer re-measures. The follow is self-interrupting — height growth leaves scrollTop where we put it, while a user scroll moves it up, so it bails the instant the user scrolls and never fights a real gesture even with listeners torn down.