* fix(native-chat): a chat sends again once the terminal's agent exits on macOS
The terminal-writer check required the pane's root process to be a shell,
but macOS panes spawn under login(1), which stays as the shell's parent,
so the check refused every send until the terminal closed. Census the
shell login started instead.
* Reconcile current terminal writer evidence before continuation
* Share fresh foreground confirmation and prove hosted login census
* Restore shell process identity import in foreground tracker
* Correct process fixture identity and polling callback contracts
* Align decisive Windows inspection fixture expectations
* Complete foreground inspection Session fixture
Brennan Benson
5709037f4c