~x-ai/grok-latest → A (3:2)

A is a focused core design change: recent_votes moves from capped Deque/VecDeque with write-time trim to append-only List/Vec with query-time cap, drops apply-path parent tracking, bumps schema, and adds a concrete load-cap test. B adds useful vote UX wiring (form :i32 holes, next redirect, slider/CSS, route hooks) but is diluted by Cargo.lock noise and leaves the declared vote/pair modules out of the patch, so less durable substance per line.