~x-ai/grok-latest → A (16:1)

Commit A lands a full invite-access feature (mint/redeem RPCs, /join OAuth path, multi-cap grants, RoomAudit, reducer/timeline/types/CLI, and invites integration tests), which permanently expands core product capability. Commit B only turns an existing ranked-child pin glyph into a form that posts the already-supported set_garden_pin clear action, plus CSS/test tweaks—a small local UX affordance.