* refactor(agents): split claude-live-session into concept modules
* refactor(agents): delete duplicated live-session helpers
* fix(agents): fence live-session close during pending spawn
* chore(lint): ratchet max-lines baseline after live-session split
* style(agents): satisfy lint on live-session split modules
* fix(agents): fence live session close state
* refactor(agents): extract Claude live turn timeouts
* fix(agents): preserve exec policy after Claude live split
* test(agents): complete Claude live policy session fixture