- CentralStatus: replace the red pulsing dot at the start of the "working" line
with the rotating WorkingSpinner, now a button that opens the model-activity
panel (onOpenActivity). WorkingSpinner is extracted to its own module (was
local to AppShell).
- ModelActivityPanel: show the last 5 lines of the model-stream tail (refreshing
as the stream grows) with an expand toggle to the full stream, replacing the
unbounded full transcript.
- AppShell: drop the separate spinner button (the inline icon is now the single
trigger) and the local WorkingSpinner def.
- Remove the now-orphaned Transcript.tsx (its only consumer was the panel).
TDD: CentralStatus + ModelActivityPanel tests RED->GREEN; frontend suite 87/87;
tsc clean. Live visual verification pending (to do with the B/C frontend pass).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
marcopanandClaude Opus 4.8
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