Add federated room detail page and improve address parsing in invites

src/pages/Dashboard.jsx

@@ -130,7 +130,7 @@ export default function Dashboard() {
       </div>
 
       {/* Room grid/list */}
-      {rooms.length === 0 ? (
+      {rooms.length === 0 && federatedRooms.length === 0 ? (
         <div className="card p-12 text-center">
           <Video size={48} className="mx-auto text-th-text-s/40 mb-4" />
           <h3 className="text-lg font-semibold text-th-text mb-2">{t('dashboard.noRooms')}</h3>