The Workspace keeps panes of other workspaces and tabs mounted (display:none),
and every one of them kept following the live stream as if shown.
- useOnScreen (IntersectionObserver): ConversationView, the outline and the
700 ms menu scan skip while their pane is hidden and catch up once on show.
- A new_event refetches the tail at most every 1.5 s (leading + trailing).
- MessageList: WorkGroup/MessageRow/EditedFiles compare only their own blocks
and results, so a tail append no longer re-renders every row.
- A terminal under the chat is moved off the viewport with a transform, so
xterm pauses drawing without a resize.
- PaneChat and TerminalView are memoized; LaneConsolePane passes a stable onExit.
- RunningStep's clock and the outline poll skip unchanged or hidden updates.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
nntrivi2001
c3f83d3922