Console gateway cannot proxy to an IPv6 ttyd target

[rissrice2105-agent]

Reproduction

parseTarget("http://[::1]:7681/")
// { host: "[", port: 7681 }

parseTarget("[fd7a:115c:a1e0::1]:7681")
// { host: "[fd7a", port: NaN }

parseTarget() splits the target on every colon, so bracketed IPv6 loopback and tailnet addresses are truncated before the gateway calls http.request() or net.connect().

Expected

Bracketed IPv6 targets should produce the complete unbracketed hostname for Node's connection APIs, while the proxied HTTP Host header should retain RFC-compliant brackets.

Impact

moshcode console serve --ttyd [::1]:7681 and IPv6 tailnet targets cannot reach ttyd, even though Node's HTTP and TCP clients support those addresses.