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fix(tui): stabilize sticky prompt tracking

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Keep the latest prompt sticky while the viewport is in live assistant output beyond history, and clear stale sticky state at the real bottom using fresh scroll height.
This commit is contained in:
Brooklyn Nicholson 2026-04-28 22:10:40 -05:00
parent afb20a1d67
commit ce2cc7302e
5 changed files with 62 additions and 7 deletions
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11
ui-tui/src/lib/viewportStore.ts
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@ -28,11 +28,18 @@ export function getViewportSnapshot(s?: ScrollBoxHandle | null): ViewportSnapsho
const pending = s.getPendingDelta()
const top = Math.max(0, s.getScrollTop() + pending)
const viewportHeight = Math.max(0, s.getViewportHeight())
const scrollHeight = Math.max(viewportHeight, s.getScrollHeight())
const cachedScrollHeight = Math.max(viewportHeight, s.getScrollHeight())
let scrollHeight = cachedScrollHeight
const bottom = top + viewportHeight
let atBottom = s.isSticky() || bottom >= scrollHeight - 2
if (!atBottom) {
scrollHeight = Math.max(viewportHeight, s.getFreshScrollHeight?.() ?? cachedScrollHeight)
atBottom = s.isSticky() || bottom >= scrollHeight - 2
}
return {
atBottom: s.isSticky() || bottom >= scrollHeight - 2,
atBottom,
bottom,
pending,
scrollHeight,