Wait to locate system-installed Node until the shell environment is loaded (#30416)

Release Notes:

- Fixed a race condition that sometimes prevented a system-installed
`node` binary from being detected.
- Fixed a bug where the `node.path` setting was not respected when
invoking npm.

crates/eval/src/eval.rs

@@ -397,7 +397,7 @@ pub fn init(cx: &mut App) -> Arc<AgentAppState> {
     cx.observe_global::<SettingsStore>(move |cx| {
         let settings = &ProjectSettings::get_global(cx).node;
         let options = NodeBinaryOptions {
-            allow_path_lookup: !settings.ignore_system_version.unwrap_or_default(),
+            allow_path_lookup: !settings.ignore_system_version,
             allow_binary_download: true,
             use_paths: settings.path.as_ref().map(|node_path| {
                 let node_path = PathBuf::from(shellexpand::tilde(node_path).as_ref());
@@ -417,7 +417,7 @@ pub fn init(cx: &mut App) -> Arc<AgentAppState> {
         tx.send(Some(options)).log_err();
     })
     .detach();
-    let node_runtime = NodeRuntime::new(client.http_client(), rx);
+    let node_runtime = NodeRuntime::new(client.http_client(), None, rx);
 
     let extension_host_proxy = ExtensionHostProxy::global(cx);