Add client routing improvements

• Restructure the client routes to allow for layout flexibility.
• Group related routes, such as /auth/login and /auth/register
• Fix bug: The email address is a unique user identifier. If it is received by user free form input, it should be sanitized and have its casing normalized to its lower-cased form before being processed.
• Ensure the map is public, but restrict alert creation if not logged in.