Implemented owner-scoped bounded feed, stable ordering, month/week navigation, overlap layout, keyboard actions, responsive list and distinct UI states.
Moved connections to /calendar/settings; callback smoke check returned HTTP 302 to the safe settings URL.
API/web typecheck PASS; production web build PASS; API unit tests PASS (3/3).
Database integration is blocked by PostgreSQL authentication (28P01).
Four Playwright scenarios were discovered. Chromium was installed, but the final invocation was rejected by the automatic execution reviewer; no browser pass is claimed.