Merge pull request #6 from justinpreston/codex/train1-integration

docs(train1): update tracker with merge and test status

test(train1): stabilize unit-test gate and protocol mocks

merge: pod-b quality and test coverage

merge: pod-c ux and settings resilience

merge: pod-a reliability scope

test(train1-pod-b): add viewmodel mocks and core service coverage

feat(train1-pod-c): add resilient state enums and settings validation UX

fix(train1-pod-a): add retry, timeout, and websocket decode visibility

docs: add pod tracking issue links to train1 tracker

docs: link train1 draft PRs and external blocker issues

docs: add pod-c train1 ux worklog

docs: add pod-a train1 reliability worklog

ci: add macOS build and test workflow

docs: add train-1 operating model and pod handoff packets