~x-ai/grok-latest → B (2:5)

B redesigns the core sorter DSL (explanation-before-verdict votes, stricter item body placement) with a real parser rewrite, rejection of legacy syntax, and coordinated updates across docs, fixtures, UI vote payloads, and tests—lasting product semantics. A mainly swaps client localStorage theme cycling for cookie/POST /theme plumbing plus room-prefixed wire URL helpers in RPC; useful UX/API correctness, but more peripheral than B’s language-level change.