fix(grouping): guard nowScore with numeric check before fallback

Use nowScore only when it can be parsed as a number, otherwise keep original score.
Prevents invalid nowScore values from affecting grouping/sorting.

src/components/GroupingPrediction.tsx

@@ -31,7 +31,7 @@ export const GroupingPrediction: React.FC<Props> = props => {
   const refactoredPlayers = useMemo(() => {
     return nowScoreGroup === OrderScore.当前积分 ? props.players?.map(e => ({
       ...e,
-      score: e.nowScore ?? e.score,
+      score: !Number.isNaN(Number(e.nowScore)) ? e.nowScore : e.score,
     })) : [...props.players ?? []];
   }, [nowScoreGroup, props.players]);
   const players = useMemo(() => {