REST API endpoints for authentication — login and profile

GET /api/v1/auth/me
Authorization: Bearer <token>

{
  "id": 1,
  "supabase_id": "550e8400-e29b-41d4-a716-446655440000",
  "email": "user@example.com",
  "role": "user",
  "plan": "starter",
  "created_at": "2024-01-15T10:00:00Z"
}

POST /api/login
Content-Type: application/json

{
  "email": "user@example.com",
  "password": "your-password"
}

{
  "user": {
    "id": 1,
    "email": "user@example.com",
    "role": "user"
  },
  "token": "eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9..."
}

POST /api/register
Content-Type: application/json

{
  "email": "newuser@example.com",
  "password": "your-password"
}