The branch had drifted from main's composer and work-log design in ways
unrelated to orchestration v2: a pre-revert "Working for" shoulder tab
on the composer (main reverted #8693 and re-landed #8734 without it),
an inline stash variant plus in-flow stash menu, expanded tool rows that
hid their icons, an unmounted woke-thread banner, a composer scroll
observer main never had, and a right-panel toggle that lost its
showRightPanelControl gate so it rendered twice with the panel open.

ChatComposer and its satellites now start from main's files with only
the v2 delta re-applied (dispatch modes, queued-message editing, runtime
request ids, response capability). Background tasks surface as a
ChatView banner in main's backgroundLiveness shape instead of a
composer tab. SimpleWorkEntryRow takes main's PlainWorkEntryRow body
with the V2ItemInspector kept behind the expander.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>