Current turn virtualization

[juliusmarminge]

Disable virtualization for the currently in-progress turn to prevent height calculation issues and collisions during streaming.

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Note

Virtualize only pre-turn rows in MessagesTimeline and pass active turn state from ChatView to support current turn virtualization

Add activeTurnInProgress and activeTurnStartedAt props to MessagesTimeline; compute firstUnvirtualizedRowIndex and use virtualizedRowCount to split rendering between virtualized past rows and non-virtualized current turn, with a timestamped working row. Minor JSX formatting update in MessageCopyButton. See ChatView.tsx and MessagesTimeline.tsx.

📍Where to Start

Start with the virtualization split and firstUnvirtualizedRowIndex logic in MessagesTimeline.tsx.

^{Macroscope summarized 88ab776.}

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Note

Medium Risk
Changes chat timeline virtualization and row rendering during in-progress turns, which can affect scrolling behavior and message/work log layout while streaming. Risk is limited to UI/UX but could introduce regressions in virtual list sizing or auto-scroll.

Overview
Prevents virtualized rendering for the currently in-progress turn in ChatView to avoid height/measurement issues during streaming.

MessagesTimeline now receives activeTurnInProgress/activeTurnStartedAt, stamps rows with createdAt, computes a split index for the active turn, virtualizes only the earlier rows, and renders the remainder (including the working indicator/current turn) non-virtualized. Minor refactor extracts shared row rendering (renderRowContent) and adds clamp to bound the virtualized row count.

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