Fix App.jsx two-page workflow JSX render and update study app layout

node_modules/@nodelib/fs.scandir/out/providers/async.d.ts

@@ -0,0 +1,7 @@
+/// <reference types="node" />
+import type Settings from '../settings';
+import type { Entry } from '../types';
+export declare type AsyncCallback = (error: NodeJS.ErrnoException, entries: Entry[]) => void;
+export declare function read(directory: string, settings: Settings, callback: AsyncCallback): void;
+export declare function readdirWithFileTypes(directory: string, settings: Settings, callback: AsyncCallback): void;
+export declare function readdir(directory: string, settings: Settings, callback: AsyncCallback): void;