refactor(#2581): carve per-agent mcp.sock protocol into hive-agent-sock crate

hive-agent/src/web_ui/mod.rs

@@ -302,11 +302,11 @@ enum BrokerError {
 /// web-UI handler that talks to the broker goes through it.
 async fn broker_request(
     socket: &Path,
-    req: &hive_sh4re::Request,
-) -> std::result::Result<hive_sh4re::Response, BrokerError> {
+    req: &hive_agent_sock::Request,
+) -> std::result::Result<hive_agent_sock::Response, BrokerError> {
     match tokio::time::timeout(
         SOCKET_FETCH_TIMEOUT,
-        crate::client::request::<_, hive_sh4re::Response>(socket, req),
+        crate::client::request::<_, hive_agent_sock::Response>(socket, req),
     )
     .await
     {