~x-ai/grok-latest → A (3:1)

A consolidates duplicated HTTP/OAuth helpers, assert/ANSI harness, cargo-build, and server-env setup out of auth/grants/integration into shared common/oauth modules (including multi-user mock Google and complete-registration!), which is lasting test architecture across the suite. B improves one local fixture workflow (cargo-watch, persistent fixture-data/, preferred port 8080) plus a small room_page HTML trim—valuable DX, but narrower and less foundational than A’s dedup.