add auth info tip

src/components/LoginForm.tsx

@@ -361,6 +361,15 @@ export default function LoginForm({
 
     return (
         <div className="space-y-4">
+            {forceLogin && (
+                <Alert variant="neutral">
+                    <AlertDescription className="flex items-center gap-2">
+                    <LockIcon className="w-4 h-4" />
+                        {t("loginRequiredForDevice")}
+                    </AlertDescription>
+                </Alert>
+            )}
+
             {showSecurityKeyPrompt && (
                 <Alert>
                     <FingerprintIcon className="w-5 h-5 mr-2" />