Add the user-facing account-security surface in Settings:
- Active sessions (closes#64): GET /api/auth/me/sessions lists each browser
login with a coarse device label, masked IP, resolved location, the sliding
last-active stamp, and the current-session marker. DELETE the collection
signs out everywhere else (keeps the current session, revokes other sessions
and native refresh tokens, leaves API tokens alone); DELETE one revokes a
single session, scoped to the owner so a foreign id 404s.
- A sliding last-active stamp on the session, written throttled and
fire-and-forget off the request-resolution path.
- Security activity: GET /api/auth/me/security-activity, the shared read over
the audit log filtered to sign-ins, second-factor changes, password changes,
session revocations, exports, and deletions, with masked IPs.
OpenAPI regenerated for the new endpoints.
Marc-André Bombeck