M3 palette consistency: orphaned B-blue monogram + old text-0 in OG billboards

Token alignment (M3.1) orphaned a few bare literals: PlayerAvatar's team-less
monogram accent still fell back to the retired B-blue #4A9EFF → Design neutral
#B8BCC8; the player/u OG + portrait billboards painted old text-0 #E8E8F0 →
Design #F0F0F0 (satori canvas needs literals).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/components/vyndr/PlayerAvatar.tsx

@@ -45,7 +45,7 @@ export default function PlayerAvatar({
   const url = (headshotUrl || playerId != null || espnId != null)
     ? getHeadshotUrl({ sport, playerId, espnId, headshotUrl })
     : null;
-  const accent = (team && accentColor(team, String(sport))) || '#4A9EFF';
+  const accent = (team && accentColor(team, String(sport))) || '#B8BCC8'; // Design neutral (was orphaned B-blue)
   const showImg = url && url !== '/images/player-silhouette.svg' && !broken;
 
   const Monogram = (