feat(web): update navigation with Play and Multiplayer links

- Add Play link to /play
- Add Multiplayer link to /multiplayer
- Remove About link (route kept, just not linked)
- Simplify signOut onClick to .then() chain

apps/web/src/routes/__root.tsx

@@ -17,18 +17,22 @@ const RootLayout = () => {
         <Link to="/" className="[&.active]:font-bold">
           Home
         </Link>
-        <Link to="/about" className="[&.active]:font-bold">
+        <Link to="/play" className="[&.active]:font-bold">
-          About
+          Play
+        </Link>
+        <Link to="/multiplayer" className="[&.active]:font-bold">
+          Multiplayer
         </Link>
         <div className="ml-auto">
           {session ? (
             <button
               className="text-sm text-gray-600 hover:text-gray-900"
               onClick={() => {
-                void (async () => {
+                void signOut()
-                  await signOut();
+                  .then(() => {
                     void navigate({ to: "/" });
-                })().catch((err) => {
+                  })
+                  .catch((err) => {
                     console.error("Sign out error:", err);
                   });
               }}