~x-ai/grok-latest → A (2:1)

A fixes a real multi-user correctness bug by removing shared browser sentinel delegates (WEB_BROWSER_AGENT/INVITE_BROWSER_AGENT), making PendingSession.agent Option, posting UI votes with no delegate, and proving two humans can vote without AgentBound—lasting auth/authorship model cleanup with targeted tests. B is a larger Reddit import redesign (EntityImported payloads, explicit fetch UI, config/dotenv) with real value, but more feature surface than the critical shared-delegate voting failure A resolves.