The header carried only the brand and a session tally; app actions had
already moved to the sidebar footer. The mobile ☰ it hosted moves to the
pane header (replacing the redundant back arrow) and to the welcome
state, so the session drawer stays reachable without a swipe. The DEV
`?kit` link moves to the sidebar footer.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Spawn and Spawn similar open a draft pane behind the open sidebar on
mobile, so the tap read as dead. Extract the drawer into its own module
and close it on both spawn events as well as a session tap.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>