refactor(#2352): route hivectl github set-token through a daemon wire command

hive-c0re/src/server.rs

@@ -196,6 +196,9 @@ async fn dispatch(req: &HostRequest, coord: Arc<Coordinator>) -> HostResponse {
             HostRequest::ForgeCreateUser { name, password } => {
                 handle_forge_create_user(name, password.as_deref()).await?
             }
+            HostRequest::SetAgentGithubToken { agent, token } => {
+                handle_set_agent_github_token(agent, token).await?
+            }
         })
     }
     .await;
@@ -395,6 +398,16 @@ async fn handle_forge_create_user(name: &str, password: Option<&str>) -> Result<
     Ok(HostResponse::messages(out))
 }
 
+async fn handle_set_agent_github_token(agent: &str, token: &str) -> Result<HostResponse> {
+    crate::priv_client::write_agent_github_token(agent, token)
+        .await
+        .with_context(|| format!("write github-token for agent {agent}"))?;
+    Ok(HostResponse::messages(vec![format!(
+        "wrote github-token for agent '{agent}' \
+         (read live by the gh wrapper / git credential helper — no rebuild needed)"
+    )]))
+}
+
 async fn handle_matrix_sync_admin() -> Result<HostResponse> {
     require_matrix_present().await?;
     let register_token =