The picker now leads the form in both clients and takes focus on open, so
Tab walks from it into the command tiles. Opening the form also preselects
the project of the session you were last on — a worktree session seeds its
base repository — so 'n' then Enter spawns another session there.
Draft panes are gone: an empty pane is a placeholder again, and every
spawn affordance opens a dialog around the shared spawn form. Escape,
Cancel, the ✕ and a backdrop click dismiss it; a successful submit puts
the session in a new tab (Spawn similar and the fast-forward fallback
keep placing it beside the pane they acted on).
Removes the per-leaf draft state, its persistence strip, and the form
reuse/teardown machinery the panes needed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>