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

node_modules/resolve/test/module_dir/xmodules/aaa/index.js

@@ -0,0 +1 @@
+module.exports = function (x) { return x * 100; };

node_modules/resolve/test/module_dir/ymodules/aaa/index.js

@@ -0,0 +1 @@
+module.exports = function (x) { return x + 100; };

node_modules/resolve/test/module_dir/zmodules/bbb/main.js

@@ -0,0 +1 @@
+module.exports = function (n) { return n * 111; };

node_modules/resolve/test/module_dir/zmodules/bbb/package.json

@@ -0,0 +1,3 @@
+{
+  "main": "main.js"
+}