Easily Selectable History (#1672)

This update replaces the previous ratatui history widget with an
append-only log so that the terminal can handle text selection and
scrolling. It also disables streaming responses, which we'll do our best
to bring back in a later PR. It also adds a small summary of token use
after the TUI exits.

codex-rs/tui/src/status_indicator_widget.rs

@@ -34,11 +34,6 @@ pub(crate) struct StatusIndicatorWidget {
     /// time).
     text: String,
 
-    /// Height in terminal rows – matches the height of the textarea at the
-    /// moment the task started so the UI does not jump when we toggle between
-    /// input mode and loading mode.
-    height: u16,
-
     frame_idx: Arc<AtomicUsize>,
     running: Arc<AtomicBool>,
     // Keep one sender alive to prevent the channel from closing while the
@@ -50,7 +45,7 @@ pub(crate) struct StatusIndicatorWidget {
 
 impl StatusIndicatorWidget {
     /// Create a new status indicator and start the animation timer.
-    pub(crate) fn new(app_event_tx: AppEventSender, height: u16) -> Self {
+    pub(crate) fn new(app_event_tx: AppEventSender) -> Self {
         let frame_idx = Arc::new(AtomicUsize::new(0));
         let running = Arc::new(AtomicBool::new(true));
 
@@ -72,18 +67,12 @@ impl StatusIndicatorWidget {
 
         Self {
             text: String::from("waiting for logs…"),
-            height: height.max(3),
             frame_idx,
             running,
             _app_event_tx: app_event_tx,
         }
     }
 
-    /// Preferred height in terminal rows.
-    pub(crate) fn get_height(&self) -> u16 {
-        self.height
-    }
-
     /// Update the line that is displayed in the widget.
     pub(crate) fn update_text(&mut self, text: String) {
         self.text = text.replace(['\n', '\r'], " ");