Added mfa and css enhancements

frontend/src/components/UpgradeNotificationIcon.jsx

@@ -0,0 +1,15 @@
+import React from 'react'
+import { ArrowUpCircle } from 'lucide-react'
+
+const UpgradeNotificationIcon = ({ className = "h-4 w-4", show = true }) => {
+  if (!show) return null
+
+  return (
+    <ArrowUpCircle 
+      className={`${className} text-red-500 animate-pulse`}
+      title="Update available"
+    />
+  )
+}
+
+export default UpgradeNotificationIcon