The dense table buried high-signal fields (name, identifier, connections)
under four 80-character Akka/gRPC URLs truncated mid-string. Replace with
a 2-column responsive card grid; cluster-node addresses now live in a
collapsed disclosure with copy-to-clipboard. Adds client-side filter,
empty/no-match states, kebab menu for less-frequent actions, and
@key=site.Id to keep Bootstrap collapse state from leaking across cards
when the filter changes.
0805e18e9c