SEOUL, South Korea (AP) — South Koreans celebrated on Monday as “Golden,” from the Netflix animated film “KPop Demon Hunters,” claimed K-pop’s first Grammy Award, a milestone that critics say highlights the genre’s global appeal and signals broader acceptance in the American mainstream. The win for best song for visual media capped a highly visible night for K-pop at the Grammys — an institution where the genre has long been undercelebrated despite its massive international following. Rosé of