revert: mark Feature::RemoteControl as removed (#22520)

reverts: https://github.com/openai/codex/pull/22386

codex-rs/app-server/src/request_processors/config_processor.rs

@@ -6,6 +6,7 @@ use crate::error_code::internal_error;
 use crate::error_code::invalid_request;
 use crate::outgoing_message::ConnectionRequestId;
 use crate::outgoing_message::OutgoingMessageSender;
+use crate::transport::RemoteControlHandle;
 use codex_analytics::AnalyticsEventsClient;
 use codex_app_server_protocol::AppListUpdatedNotification;
 use codex_app_server_protocol::ClientResponsePayload;
@@ -38,6 +39,7 @@ use codex_config::MatcherGroup as CoreMatcherGroup;
 use codex_config::ResidencyRequirement as CoreResidencyRequirement;
 use codex_config::SandboxModeRequirement as CoreSandboxModeRequirement;
 use codex_core::ThreadManager;
+use codex_features::Feature;
 use codex_features::canonical_feature_for_key;
 use codex_features::feature_for_key;
 use codex_login::AuthManager;
@@ -65,6 +67,7 @@ pub(crate) struct ConfigRequestProcessor {
     auth_manager: Arc<AuthManager>,
     thread_manager: Arc<ThreadManager>,
     analytics_events_client: AnalyticsEventsClient,
+    remote_control_handle: Option<RemoteControlHandle>,
 }
 
 impl ConfigRequestProcessor {
@@ -74,6 +77,7 @@ impl ConfigRequestProcessor {
         auth_manager: Arc<AuthManager>,
         thread_manager: Arc<ThreadManager>,
         analytics_events_client: AnalyticsEventsClient,
+        remote_control_handle: Option<RemoteControlHandle>,
     ) -> Self {
         Self {
             outgoing,
@@ -81,6 +85,7 @@ impl ConfigRequestProcessor {
             auth_manager,
             thread_manager,
             analytics_events_client,
+            remote_control_handle,
         }
     }
 
@@ -182,6 +187,21 @@ impl ConfigRequestProcessor {
     pub(crate) async fn handle_config_mutation(&self) {
         self.thread_manager.plugins_manager().clear_cache();
         self.thread_manager.skills_manager().clear_cache();
+        let Some(remote_control_handle) = &self.remote_control_handle else {
+            return;
+        };
+
+        match self.load_latest_config(/*fallback_cwd*/ None).await {
+            Ok(config) => {
+                remote_control_handle.set_enabled(config.features.enabled(Feature::RemoteControl));
+            }
+            Err(error) => {
+                tracing::warn!(
+                    "failed to load config for remote control enablement refresh after config mutation: {}",
+                    error.message
+                );
+            }
+        }
     }
 
     async fn handle_config_mutation_result<T>(