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

node_modules/docx/dist/file/paragraph/math/brackets/math-square-brackets.d.ts

@@ -0,0 +1,7 @@
+import { XmlComponent } from '../../../xml-components';
+import { MathComponent } from '../math-component';
+export declare class MathSquareBrackets extends XmlComponent {
+    constructor(options: {
+        readonly children: readonly MathComponent[];
+    });
+}