Harden help overlay viewport fit on small iOS screens

patterns/vsf-card-listen-fundamentalanalyse-drawer.html

@@ -458,8 +458,12 @@
           return;
         }
 
+        const viewportWidth = window.visualViewport
+          ? window.visualViewport.width
+          : window.innerWidth;
+
         const panelRect = panel.getBoundingClientRect();
-        if (panelRect.right > window.innerWidth) {
+        if (panelRect.right > viewportWidth) {
           wrap.dataset.align = 'right';
         }