fix: channel page bug fix

src/components/channel/addNotice.js

src/components/channel/channel.js

src/components/channel/createChannel.js

src/components/channel/existingChannel.js

src/components/channel/iconModal.js

src/components/channel/notice.js

src/components/channel/pictureModal.js

src/components/infiniteScroll.js

src/components/mypage/my_editModal.js

src/components/mypage/my_editModal.module.css

src/pages/login.js

src/pages/mypage.js