export default function YourProtectedPage() {
  const { user } = useAuth()
  
  return (
    <div>
      <h1>Welcome, {user?.email}!</h1>
      {/* Your protected content */}
    </div>
  )
}

const response = await fetch('/api/llm/generate', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    prompt: 'Your prompt here',
    model: 'gpt-4o-mini', // or 'demo'
    stream: false
  })
})

const data = await response.json()
console.log(data.content)

// Frontend error handling
try {
  const res = await fetch('/api/endpoint')
  const data = await res.json()
  
  if (!data.success) {
    setError(data.message || 'Something went wrong')
    return
  }
  
  // Process data
} catch (error) {
  setError('Network error')
} finally {
  setLoading(false)
}

// Loading state pattern
const [loading, setLoading] = useState(false)
const [data, setData] = useState(null)

async function fetchData() {
  setLoading(true)
  try {
    const result = await api.getData()
    setData(result)
  } finally {
    setLoading(false)
  }
}

// In your component
{loading ? (
  <div className="animate-pulse">Loading...</div>
) : (
  <div>{data}</div>
)}

// Form validation pattern
function validateForm() {
  const errors = {}
  
  if (!email.includes('@')) {
    errors.email = 'Valid email required'
  }
  
  if (password.length < 6) {
    errors.password = 'Min 6 characters'
  }
  
  setErrors(errors)
  return Object.keys(errors).length === 0
}

// On submit
if (!validateForm()) return

// Success response
{
  "success": true,
  "data": { /* your data */ },
  "message": "Success"
}

// Error response
{
  "success": false,
  "error": "Error message",
  "code": "ERROR_CODE"
}