diff --git a/frontend/js/app.js b/frontend/js/app.js
index 8b3223a..6b2da45 100644
--- a/frontend/js/app.js
+++ b/frontend/js/app.js
@@ -613,7 +613,7 @@ function updateVerifyBanner(user) {
   if (!appEl || !appEl.parentNode) return;
   const b = document.createElement('div');
   b.id = 'verifyBanner';
-  b.style.cssText = 'background:var(--warning,#f59e0b);color:#1a1200;padding:9px 16px;font-size:13px;display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin-left:var(--sidebar-width,220px)';
+  b.style.cssText = 'background:var(--warning,#f59e0b);color:#1a1200;padding:9px 16px;font-size:13px;display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap';
   b.innerHTML = `<span>✉️ ${t('auth.verify_banner')}</span>`;
   const btn = document.createElement('button');
   btn.className = 'btn btn-sm';
@@ -624,7 +624,7 @@ function updateVerifyBanner(user) {
     catch { showToast(t('auth.verify_resend_failed'), 'error'); }
   });
   b.appendChild(btn);
-  appEl.parentNode.insertBefore(b, appEl);
+  appEl.prepend(b);
 }
 
 function updateWidgetSandboxWarningBanner(user) {
@@ -636,7 +636,7 @@ function updateWidgetSandboxWarningBanner(user) {
   if (!appEl || !appEl.parentNode) return;
   const b = document.createElement('div');
   b.id = 'widgetSandboxWarningBanner';
-  b.style.cssText = 'background:var(--danger,#dc2626);color:#fff;padding:10px 16px;font-size:13px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;font-weight:600;margin-left:var(--sidebar-width,220px)';
+  b.style.cssText = 'background:var(--danger,#dc2626);color:#fff;padding:10px 16px;font-size:13px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;font-weight:600';
   const text = document.createElement('span');
   text.style.whiteSpace = 'pre-line';
   text.textContent = 'Widget sandbox isolation is DISABLED. Widget code in this organization runs\nwith full access to user sessions. Re-enable in Settings > Security.';
@@ -646,7 +646,7 @@ function updateWidgetSandboxWarningBanner(user) {
   link.style.cssText = 'color:#fff;text-decoration:underline;font-weight:700';
   b.appendChild(text);
   b.appendChild(link);
-  appEl.parentNode.insertBefore(b, appEl);
+  appEl.prepend(b);
 }
 
 // Initialize