US09-04: Write the User Manual with Generated Screenshots (#110)

frontend/js/app.js

@@ -1,6 +1,7 @@
 import { api } from "./api.js";
 import { renderArchive, setArchiveRender } from "./archive.js";
 import { renderDocs } from "./docs.js";
+import { show as showIn } from "./dom.js";
 import { navigate, onRouteChange, parseHash } from "./router.js";
 import { renderRenames, setRenamesRender } from "./renames.js";
 import { renderUploads, setUploadsRender } from "./uploads.js";
@@ -35,7 +36,7 @@ function el(tag, attrs = {}, ...children) {
 }
 
 function show(...nodes) {
-  root.replaceChildren(...nodes);
+  showIn(root, ...nodes);
 }
 
 function setActiveNav(view) {