sync: complete remaining files (source dhk-1)

frontend-web/scripts/react-ui-error-boundary-check.html

@@ -0,0 +1,8 @@
+<!doctype html>
+<html lang="zh-CN">
+  <head><meta charset="utf-8"><title>Offline React UI boundary check</title></head>
+  <body>
+    <div id="root"></div>
+    <script src="../.runtime/ui-boundary-check/check.js"></script>
+  </body>
+</html>