fix: resolve typescript and build errors across admin and guest apps

resources/js/guest/components/Header.tsx

@@ -509,7 +509,7 @@ function NotificationButton({ center, eventToken, open, onToggle, panelRef, butt
             t={t}
           />
         </div>,
-        typeof document !== 'undefined' ? document.body : undefined
+        (typeof document !== 'undefined' ? document.body : null) as any
       )}
     </div>
   );