fix: wrongfull jsx without single parent

src/app/editor/[projectId]/page.tsx

@@ -42,7 +42,7 @@ export default async function EditorPage({ params }: PageProps) {
   // the project was created before these features existed and may need auto-migration
   const needsMigration = !rawData.characters && !rawData.variables
 
-  return (
+  return (<>
     <div className="flex h-screen flex-col">
       <header className="flex items-center justify-between border-b border-zinc-200 bg-white px-4 py-3 dark:border-zinc-700 dark:bg-zinc-900">
         <div className="flex items-center gap-4">
@@ -103,6 +103,7 @@ export default async function EditorPage({ params }: PageProps) {
           needsMigration={needsMigration}
         />
       </div>
+    </>
     )
   }