~anthropic/claude-sonnet-latest → B (6:4)

Side B implements a real feature with security implications (multi-provider OAuth linking, UUID-canonical identity, conflict handling for already-linked accounts, private provider visibility) with backing unit tests and mock-server test infrastructure updates. Side A is mostly plumbing (threading theme/jar/uri params through many handlers) plus a room-URL-prefixing helper, which is useful but lower-stakes UI/URL-formatting churn compared to B's identity/auth model change.