[codex] fetch featured IDs for remote plugins (#29485)

## Summary

- fetch featured plugin IDs when the loaded catalog includes
`openai-curated-remote`
- extend the existing remote marketplace regression test to cover the
featured IDs response

## Why

When the remote plugin catalog was enabled, app-server loaded
`openai-curated-remote` but skipped `/plugins/featured` because the
request processor only fetched featured IDs for the local
`openai-curated` marketplace. As a result, the desktop app could not
render the backend-curated remote featured set.

This keeps the existing local behavior and also returns the curated
ranking for remote plugins.

## Test plan

- `just fmt`
- `git diff --check`
- `just test -p codex-app-server
plugin_list_includes_remote_marketplaces_when_remote_plugin_enabled`

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

@@ -745,11 +745,10 @@ impl PluginRequestProcessor {
             );
         }
 
-        let featured_plugin_ids = if !plugins_input.remote_plugin_enabled
-            && data
-                .iter()
-                .any(|marketplace| marketplace.name == OPENAI_CURATED_MARKETPLACE_NAME)
-        {
+        let featured_plugin_ids = if data.iter().any(|marketplace| {
+            marketplace.name == OPENAI_CURATED_MARKETPLACE_NAME
+                || marketplace.name == REMOTE_GLOBAL_MARKETPLACE_NAME
+        }) {
             match plugins_manager
                 .featured_plugin_ids_for_config(&plugins_input, auth.as_ref())
                 .await

codex-rs/app-server/tests/suite/v2/plugin_list.rs

@@ -1761,6 +1761,14 @@ async fn plugin_list_includes_remote_marketplaces_when_remote_plugin_enabled() -
         .respond_with(ResponseTemplate::new(200).set_body_string(empty_page_body))
         .mount(&server)
         .await;
+    Mock::given(method("GET"))
+        .and(path("/backend-api/plugins/featured"))
+        .and(query_param("platform", "codex"))
+        .respond_with(
+            ResponseTemplate::new(200).set_body_string(r#"["linear@openai-curated-remote"]"#),
+        )
+        .mount(&server)
+        .await;
 
     let mut mcp = TestAppServer::new(codex_home.path()).await?;
     timeout(DEFAULT_TIMEOUT, mcp.initialize()).await??;
@@ -1854,7 +1862,10 @@ async fn plugin_list_includes_remote_marketplaces_when_remote_plugin_enabled() -
         cached_plugin_ids,
         vec!["plugins~Plugin_00000000000000000000000000000000".to_string()]
     );
-    assert_eq!(response.featured_plugin_ids, Vec::<String>::new());
+    assert_eq!(
+        response.featured_plugin_ids,
+        vec!["linear@openai-curated-remote".to_string()]
+    );
     assert!(
         !server
             .received_requests()