fix(web): 닉네임 중복 토스트 이슈 포함 react-hot-toast 전면 전환#506

manNomi wants to merge 2 commits intomainsolid-connection/solid-connect-web:mainfrom

codex/migrate-react-hot-toastsolid-connection/solid-connect-web:codex/migrate-react-hot-toastCopy head branch name to clipboard