ListVideos now sorts summarized-first, then published_at DESC with undated videos last, then seen_at DESC as a tiebreak (was seen_at only). Aligns the list with the recency framing — newest content surfaces first — so the recency-bounded feed reads coherently (UX review B2). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>