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

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

@@ -0,0 +1,13 @@
+import { Paragraph } from './paragraph';
+import { Table } from './table';
+export type IHeaderOptions = {
+    readonly children: readonly (Paragraph | Table)[];
+};
+export declare class Header {
+    readonly options: IHeaderOptions;
+    constructor(options?: IHeaderOptions);
+}
+export declare class Footer {
+    readonly options: IHeaderOptions;
+    constructor(options?: IHeaderOptions);
+}