Add some typing to fix typescript linter errors

src/hooks/auth.tsx

@@ -1,5 +1,6 @@
 import Cookies from "js-cookie";
 import { parseJWT } from "../api";
+import User from "../models/User";
 import { useAppStore } from "../providers/AppStoreProvider";
 
 /** Hook to interact with authentication data within the global app store. */
@@ -16,7 +17,7 @@ const useAuth = (): {
    * decoded version of the JWT for use elsewhere.
    */
   const login = (jwt: string) => {
-    updateAppStore("auth", { jwt, user: parseJWT(jwt) });
+    updateAppStore("auth", { jwt, user: parseJWT(jwt) as User });
     Cookies.set("jwt", jwt, {
       sameSite: "strict",
       expires: 7,

src/pages/Home/index.tsx

@@ -43,7 +43,7 @@ const HomePage: Component = () => {
         <CharacterGroup
           title="New Characters"
           description="Recent creations from the community."
-          characters={query.data}
+          characters={query.data || []}
         />
       </Suspense>
     </RequiresAuth>