Round 10 restored the branch's pre-#7150 composer body while its
satellites (shoulder badges, banner drawers, glass css) arrived in
main's new form, and every seam between the two was a visible bug:
opaque/frameless composer, overflowing stash tab, detached stash menu.

Rebuilt ChatComposer via a reverse three-way merge (main's body as the
base, branch delta re-applied): dispatchMode send boundary, live-capable
approval gates, latestRun reads, and the v2 context-window meter stay;
everything else now matches main, including ComposerPrimaryActions and
the sendDisabledReason send gating. Attachment uploads stay off until
the v2 claim path lands.

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