- Added `buildDnsPreviewRecords` function to generate DNS records based on hostname, TTL, and provided IPv4/IPv6 addresses.
- Updated `fleetRoutes` to utilize the new DNS records generation for hostname previews.
- Enhanced frontend API calls to support IPv4, IPv6, and node ID parameters for more comprehensive hostname previews.
- Updated UI components to display DNS preview information, including A, AAAA, and CNAME records.