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

node_modules/docx/dist/file/header/header.d.ts

@@ -0,0 +1,9 @@
+import { InitializableXmlComponent, XmlComponent } from '../xml-components';
+import { Paragraph } from '../paragraph';
+import { Table } from '../table';
+export declare class Header extends InitializableXmlComponent {
+    private readonly refId;
+    constructor(referenceNumber: number, initContent?: XmlComponent);
+    get ReferenceId(): number;
+    add(item: Paragraph | Table): void;
+}