feat: bug fix

src/App.js

src/components/Header.module.css

src/components/calendar/addModal.module.css

src/components/calendar/deleteModal.module.css

src/components/calendar/inquiryListModal.module.css

src/components/channel/addNotice.module.css

src/components/channel/channel.js

src/components/channel/channel.module.css

src/components/channel/channelList.js

src/components/channel/channelList.module.css

src/components/channel/channelListModal.js

src/components/channel/channelListModal.module.css

src/components/channel/existingChannel.js

src/components/channel/existingChannel.module.css

src/components/channel/iconModal.js

src/components/channel/iconModal.module.css

src/components/channel/pictureModal.js

src/components/channel/pictureModal.module.css

src/components/infiniteScroll.js

src/components/infiniteScroll.module.css