The rebase left a stale early copy of the composer glass-host, context-strip,
and shape() fallback rules that the identical later block always overrode.
The composer shell and queue/context strips also kept main's 48rem width while
the timeline moved to the 46rem content lane; they now share
--chat-content-max-width so one owner defines the chat column.

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