Added new frontend.

visualizer/public/vendor/htmx/ext/ajax-header.js

@@ -0,0 +1,7 @@
+htmx.defineExtension('ajax-header', {
+    onEvent: function (name, evt) {
+        if (name === "htmx:configRequest") {
+            evt.detail.headers['X-Requested-With'] = 'XMLHttpRequest';
+        }
+    }
+});