Fix api import in Login.jsx — use named export

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/pages/Login.jsx

@@ -3,7 +3,7 @@ import { useNavigate } from 'react-router-dom'
 import { useAuth } from '../contexts/AuthContext'
 import { useLanguage } from '../i18n/LanguageContext'
 import { Megaphone, Lock, Mail, AlertCircle, User, CheckCircle } from 'lucide-react'
-import api from '../utils/api'
+import { api } from '../utils/api'
 
 export default function Login() {
   const navigate = useNavigate()