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perf(flow-chat): reduce subagent session panel rendering overhead - #2944
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wsp1911
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Sep 10, 2026
wsp1911
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- Virtualize child-session transcripts using the shared virtualizer
- Scope subscriptions to the child session and required parent fields
- Unmount hidden panel content while preserving reading and expand state
- Restore scroll anchors and tail-follow behavior when reopening tabs
- Avoid reloading persisted review state on every tab switch
- Add regression tests for windowing, subscriptions, and panel lifecycle
- Virtualize child-session transcripts using the shared virtualizer - Scope subscriptions to the child session and required parent fields - Unmount hidden panel content while preserving reading and expand state - Restore scroll anchors and tail-follow behavior when reopening tabs - Avoid reloading persisted review state on every tab switch - Add regression tests for windowing, subscriptions, and panel lifecycle
- Separate shared helpers and contexts from component exports to preserve React Fast Refresh boundaries - Update consumers and tests to use the extracted modules - Define BtwSessionPanelContent before its wrapper - Remove an unused ESLint directive and unnecessary export
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