Show a shimmer skeleton placeholder while fetching the local IPv4
address via the IPv4-only domain. When the primary IP is already IPv4,
no loading state is displayed and the alt section fades in directly.
The detectAltIp() function was unconditionally fetching the viewer's own
IPv6/IPv4 address and displaying it alongside queried IP results. Pass
the is_query flag to the client via a data attribute and guard the
alt-IP detection so it only runs when viewing your own IP.
NetworkCats