chore: bump version to 2.1.2 and update user name handling in GuestJoin component

src/pages/GuestJoin.jsx

@@ -19,7 +19,7 @@ export default function GuestJoin() {
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState(null);
   const [joining, setJoining] = useState(false);
-  const [name, setName] = useState(user?.name || '');
+  const [name, setName] = useState(user?.display_name || user?.name || '');
   const [accessCode, setAccessCode] = useState(searchParams.get('ac') || '');
   const [moderatorCode, setModeratorCode] = useState('');
   const [status, setStatus] = useState({ running: false });