refactor: more TS code

src/routes/chat/ChannelList/NavItem.tsx

@@ -17,8 +17,8 @@ import { getUnreadCount } from "../utils";
 import { useAppSelector } from "../../../app/store";
 interface IProps {
   id: number;
-  setFiles: () => void;
-  toggleRemoveConfirm: () => void;
+  setFiles: (files: File[]) => void;
+  toggleRemoveConfirm: (id: number) => void;
 }
 const NavItem: FC<IProps> = ({ id, setFiles, toggleRemoveConfirm }) => {
   const { pathname } = useLocation();

src/routes/chat/ChannelList/index.tsx

@@ -3,13 +3,13 @@ import DeleteConfirmModal from "../../settingChannel/DeleteConfirmModal";
 import NavItem from "./NavItem";
 import { useAppSelector } from "../../../app/store";
 
-export default function ChannelList({ setDropFiles }) {
-  const [currId, setCurrId] = useState(null);
+export default function ChannelList({ setDropFiles }: { setDropFiles: (files: File[]) => void }) {
+  const [currId, setCurrId] = useState<number>();
   const { channelIds } = useAppSelector((store) => {
     return { channelIds: store.channels.ids };
   });
 
-  const setRemoveChannel = (cid = undefined) => {
+  const setRemoveChannel = (cid?: number) => {
     setCurrId(cid);
   };