fix(core): stabilize background mcp startup coverage

codex-rs/core/tests/suite/plugins.rs

@@ -177,6 +177,7 @@ async fn capability_sections_render_in_developer_message_in_order() -> Result<()
         apps_server.chatgpt_base_url,
     )
     .await?;
+    wait_for_mcp_server(&codex, "codex_apps").await?;
 
     codex
         .submit(Op::UserInput {

codex-rs/thread-manager-sample/src/main.rs

@@ -205,6 +205,7 @@ fn new_config(model: Option<String>, arg0_paths: Arg0DispatchPaths) -> anyhow::R
         tui_terminal_title: None,
         tui_theme: None,
         tui_raw_output_mode: false,
+        tui_show_mcp_startup_status: false,
         tui_pet: None,
         tui_pet_anchor: TuiPetAnchor::Composer,
         terminal_resize_reflow: TerminalResizeReflowConfig::default(),