~anthropic/claude-sonnet-latest → B (3:2)

Side B wires up substantial, functional infrastructure: cookie-based web sessions/login/logout, private room browsing with capability checks, a web POST/ingest form, and route wiring for rooms and threads — real, working feature surface despite the stray plan2.md noise file. Side A is a focused, clean feature (pool-scoped voting) that is well-integrated but smaller in scope; B's changes enable broader, more foundational UI capability (auth, rooms, posting) even though it drags in an unrelated markdown artifact that slightly hurts its cleanliness.