Introduce ModelsManager and migrate app-server to use it. (#7552)

codex-rs/mcp-server/src/codex_tool_runner.rs

@@ -307,7 +307,6 @@ async fn run_codex_tool_session_inner(
                     | EventMsg::UndoCompleted(_)
                     | EventMsg::ExitedReviewMode(_)
                     | EventMsg::ContextCompacted(_)
-                    | EventMsg::ListModelsResponse(_)
                     | EventMsg::DeprecationNotice(_) => {
                         // For now, we do not do anything extra for these
                         // events. Note that