~anthropic/claude-sonnet-latest → B (65:35)

Side B fixes a real concurrency bug: nested RwLock reads inside a match previously held a guard across further read/write calls, which could deadlock tokio's non-reentrant lock — a lasting correctness fix backed by a new integration test, plus corrects wrong test assertions (@user vs stored username) and hardens test harness timeouts to prevent flaky hangs. Side A is mostly UI polish (vote counts, HUD unpin button, CSS) which is useful but cosmetic and lower-stakes compared to a deadlock fix.