add prediction submission checkmark to player list

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/components/player-list.tsx

@@ -4,9 +4,10 @@ import type { Player } from "@celebrate-esc/shared"
 interface PlayerListProps {
 	players: Player[]
 	mySessionId: string | null
+	predictionSubmitted?: Record<string, boolean>
 }
 
-export function PlayerList({ players, mySessionId }: PlayerListProps) {
+export function PlayerList({ players, mySessionId, predictionSubmitted }: PlayerListProps) {
 	return (
 		<div className="flex flex-col gap-2">
 			<h3 className="text-sm font-medium text-muted-foreground">Players ({players.length})</h3>
@@ -27,6 +28,9 @@ export function PlayerList({ players, mySessionId }: PlayerListProps) {
 						{player.sessionId === mySessionId && (
 							<span className="text-xs text-muted-foreground">(you)</span>
 						)}
+						{predictionSubmitted?.[player.id] && (
+							<span className="text-green-600" title="Prediction submitted">✓</span>
+						)}
 					</li>
 				))}
 			</ul>