Add Notification and new mini desing

frontend/src/components/Auth.jsx

@@ -11,7 +11,7 @@ export default function Auth({ onLogin }) {
   const [showPassword, setShowPassword] = useState(false);
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState('');
-  const [theme] = useState(localStorage.getItem('theme') || 'dark');
+  const [theme] = useState(localStorage.getItem('theme') || 'modern');
   const [oidcProviders, setOidcProviders] = useState({});
 
   const currentTheme = getTheme(theme);
@@ -182,7 +182,7 @@ export default function Auth({ onLogin }) {
           {isLogin && (
             <div className={`mt-6 text-center text-sm ${currentTheme.textSecondary}`}>
               <p>Учётные данные по умолчанию:</p>
-              <p className={`${currentTheme.text} font-mono mt-1`}>Sofa12345 / arkonsad123</p>
+              <p className={`${currentTheme.text} font-mono mt-1`}>none / none</p>
             </div>
           )}
         </div>