feat: codex tool tips (#7440)

<img width="551" height="316" alt="Screenshot 2025-12-01 at 12 22 26"
src="https://github.com/user-attachments/assets/6ca3deff-8ef8-4f74-a8e1-e5ea13fd6740"
/>

codex-rs/tui/src/app_backtrack.rs

@@ -347,6 +347,7 @@ impl App {
             enhanced_keys_supported: self.enhanced_keys_supported,
             auth_manager: self.auth_manager.clone(),
             feedback: self.feedback.clone(),
+            is_first_run: false,
         };
         self.chat_widget =
             crate::chatwidget::ChatWidget::new_from_existing(init, conv, session_configured);