- GitManagerModal mobile tab strip is now icon-only one-row: assert non-shrink via flex:0 0 auto + width:auto (was min-height for the old icon+label layout). - MailboxView split-pane divider now mirrors the Chat divider: handle width var(--space-sm) + transparent background, ::before line var(--space-xs) (was --space-xs handle + color-mix bg). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>