GET /ai/notification/unread HTTP/1.1
Host: api.glowb.com
Authorization: Bearer eyJhbGciOiJIUzI1NiIs...

curl "https://api.glowb.com/ai/notification/unread" \
  -H "Authorization: Bearer {access_token}"

const response = await fetch('/ai/notification/unread', {
  headers: {
    'Authorization': `Bearer ${accessToken}`
  }
});
const hasUnread = await response.json();

// 배지 표시 예시
if (hasUnread) {
  showNotificationBadge();
}