~x-ai/grok-latest → A (5:1)

A restores lasting product surface: session cookies/web login-logout, POST /post ingest, home + private room indexes, and room-scoped thread/post views with ACL checks—real multi-tenant UI wiring. B only fixes test doubles (regex split, getRequestBody, null-safe state/token, try/catch) so Clojure E2E auth runs again; valuable but narrow test-infra vs. A’s durable app behavior.