feat(agent-interface): scroll-to-latest arrow - #888
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A down-arrow above the composer when the last message's content sits below the fold. Content bottom is measured from the last message's children: the user-message-anchor spacer inflates the message's own box, so raw scrollHeight math reports content that isn't there and scrolling to it lands in empty space. Click scrolls the content element into view with `block: "end"`, which applies the scroller's scroll-padding-bottom and lands where the built-in scroll variants land rather than under the bottom fade mask. Re-measures on scroll and on resize of both the content box and the scroller, so it also appears on a conversation that loads taller than the viewport.
abhithesys
approved these changes
Jul 30, 2026
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A down-arrow above the composer when the last message's content sits below the fold. Content bottom is measured from the last message's children: the user-message-anchor spacer inflates the message's own box, so raw scrollHeight math reports content that isn't there and scrolling to it lands in empty space. Click scrolls the content element into view with
block: "end", which applies the scroller's scroll-padding-bottom and lands where the built-in scroll variants land rather than under the bottom fade mask. Re-measures on scroll and on resize of both the content box and the scroller, so it also appears on a conversation that loads taller than the viewport.What
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