Fixed
- Restart corpses are now replaced, not focused. A herdr server restart (
pane_history) restores the Notes pane's label and scrollback but not its process or heartbeat token — the toggle used to focus that dead shell forever. The launch decision now treats a labeled pane with no heartbeat token as dead and replaces it on the next toggle. - To make that safe, the launchers stamp the pane's identity token synchronously right after
pane split(new--stamp <pane-id>helper mode), before the TUI process spawns — a freshly opened pane is never mistaken for a corpse, so rapid re-toggles can't replace-loop it.
Verified live against a real server restart in an isolated herdr session.