Terminal without an open port: the agent calls back, and the SSH dialog shows its state

Bamboo reports where its SSH server listens. When a terminal is opened,
Hammerhead lists the session in the site's config and the agent connects out and
joins that connection to its SSH server; Hammerhead signs in over it. No port
resource or edge is involved. A site whose Bamboo does not report an SSH server
still works through an SSH port. The long poll now returns at once for a session
the agent has not been told about, so a request between two polls is not missed.

The SSH dialog shows whether the SSH server is running, says when no port is
needed, and offers the port only for an ordinary ssh client. Builds against Reef
v0.1.12 and Bamboo v0.1.9.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

go.mod

@@ -3,9 +3,9 @@ module git.veillax.com/Veillax/hammerhead
 go 1.27.3
 
 require (
-	git.veillax.com/Veillax/bamboo v0.1.8
+	git.veillax.com/Veillax/bamboo v0.1.9
 	git.veillax.com/Veillax/blacktip v0.1.10
-	git.veillax.com/Veillax/reef v0.1.11
+	git.veillax.com/Veillax/reef v0.1.12
 	github.com/emersion/go-msgauth v0.7.0
 	golang.org/x/crypto v0.58.0
 	golang.org/x/net v0.61.0