Fix category headers showing as raw HTML on New Item page

Use createElementFromHtml() to properly parse HTML strings
instead of treating them as plain text.

Fixes #26053

Author: Abhijeet212004

src/main/js/add-item.js

@@ -135,8 +135,8 @@ document.addEventListener("DOMContentLoaded", () => {
         $items.append(drawItem(elem));
       });
 
-      $catHeader.append(title);
-      $catHeader.append(description);
+      $catHeader.append(createElementFromHtml(title));
+      $catHeader.append(createElementFromHtml(description));
       $category.append($catHeader);
       $category.append($items);