app-server: Add transport for remote control (#15951)

codex-rs/features/src/tests.rs

@@ -165,6 +165,12 @@ fn image_detail_original_feature_is_under_development() {
     assert_eq!(Feature::ImageDetailOriginal.default_enabled(), false);
 }
 
+#[test]
+fn remote_control_is_under_development() {
+    assert_eq!(Feature::RemoteControl.stage(), Stage::UnderDevelopment);
+    assert_eq!(Feature::RemoteControl.default_enabled(), false);
+}
+
 #[test]
 fn collab_is_legacy_alias_for_multi_agent() {
     assert_eq!(feature_for_key("multi_agent"), Some(Feature::Collab));