function renderIsolatedPreview(generatedHTML) {
const sidebar = document.getElementById("previewSidebarBody");
sidebar.innerHTML = ""; // Clear existing frame
const iframe = document.createElement("iframe");
iframe.className = "preview-frame";
iframe.id = "activePreviewFrame";
iframe.setAttribute("sandbox", "allow-same-origin");
// Injects Nextura Tokens directly into the iframe's isolated document root
iframe.srcdoc = `
${generatedHTML}
`;
sidebar.appendChild(iframe);
document.getElementById("screen-chat").classList.add("has-sidebar");
}