add per-agent url to host.sock agent status rows

hive-sh4re/src/container.rs

@@ -83,6 +83,16 @@ pub struct AgentStatusRow {
     /// `None`.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status_set_at: Option<DateTime<Utc>>,
+    /// This agent's own web UI, behind the gateway
+    /// (`https://<hive-domain>/agent/<name>/`) — the same URL the operator
+    /// dashboard's "open" action uses. `None` when the hive's domain isn't
+    /// configured (`HYPERHIVE_HIVE_DOMAIN` unset), same condition
+    /// `HostRequest::Urls`'s `HiveUrls::home` is `None` under. Present here
+    /// (not just derivable from `HiveUrls`) so a client never has to build
+    /// this path itself — see `hive-c0re/container_view.rs`'s `agent_url`
+    /// for why a client deriving it is the wrong shape to depend on.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub url: Option<String>,
 }
 
 /// One matrix identity an agent can act as, surfaced in `GetAgentMeta`'s