[fix] lint and building errors

src/components/cstb/SteamUsers.tsx

@@ -54,7 +54,7 @@ const SteamUsers = ({ className }: { className?: string }) => {
                     {user.steam_id32}
                   </Chip>
                   <Chip size="sm" className="bg-zinc-200 dark:bg-zinc-800">
-                    {user.steam_id64?.toString()}
+                    {user.steam_id64.toString()}
                   </Chip>
                   {user.recent > 0 && (
                     <Chip size="sm" color="primary">

src/components/window/SideBar.tsx

@@ -55,7 +55,7 @@ const Avatar = () => {
     <img
       src={
         steam.currentUser()?.avatar
-          ? `data:image/png;base64,${steam.currentUser()?.avatar}`
+          ? `data:image/png;base64,${steam.currentUser()?.avatar || ''}`
           : "/logo_square.png"
       }
       alt="avatar"