fix(web): 푸시 알림 after() 전환 + SW 정리 + 알림 로직 개선#53

bbbang105 merged 1 commit intodevbbbang105/study-admin:devfrom

fix/push-notification-after-and-improvementsbbbang105/study-admin:fix/push-notification-after-and-improvementsCopy head branch name to clipboard