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fix(webview): anchor thinking timer to message timestamp to survive Virtuoso remounts #881

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fix(webview): anchor thinking timer to message timestamp to survive Virtuoso remounts #881

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fix(webview): anchor thinking timer to message timestamp to survive r…
umi008 Jul 11, 2026
0fce8f2
Merge branch 'main' into fix/656-reasoning-timer-reset
umi008 Jul 11, 2026
17e1593
Merge branch 'main' into fix/656-reasoning-timer-reset
umi008 Jul 11, 2026
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11 changes: 8 additions & 3 deletions webview-ui/src/components/chat/ReasoningBlock.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -14,14 +14,19 @@ interface ReasoningBlockProps {
metadata?: any
}

export const ReasoningBlock = ({ content, isStreaming, isLast }: ReasoningBlockProps) => {
export const ReasoningBlock = ({ content, isStreaming, isLast, ts }: ReasoningBlockProps) => {
const { t } = useTranslation()
const { reasoningBlockCollapsed } = useExtensionState()

const [isCollapsed, setIsCollapsed] = useState(reasoningBlockCollapsed)

const startTimeRef = useRef<number>(Date.now())
const [elapsed, setElapsed] = useState<number>(0)
// Anchor the elapsed timer to the message creation timestamp (ts)
// rather than component mount time. When Virtuoso recycles or
// remounts this component (e.g. during expand/collapse in a
// virtualized list), the timer survives because ts is a stable
// prop from the message data rather than a fresh Date.now().
const startTimeRef = useRef<number>(ts)
const [elapsed, setElapsed] = useState<number>(() => (isStreaming ? 0 : Math.max(0, Date.now() - ts)))
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const contentRef = useRef<HTMLDivElement>(null)

useEffect(() => {
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