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/bottom_pane/mod.rs

@@ -65,10 +65,8 @@ impl BottomPane<'_> {
             if !view.is_complete() {
                 self.active_view = Some(view);
             } else if self.is_task_running {
-                let height = self.composer.calculate_required_height(&Rect::default());
                 self.active_view = Some(Box::new(StatusIndicatorView::new(
                     self.app_event_tx.clone(),
-                    height,
                 )));
             }
             self.request_redraw();
@@ -138,10 +136,8 @@ impl BottomPane<'_> {
         match (running, self.active_view.is_some()) {
             (true, false) => {
                 // Show status indicator overlay.
-                let height = self.composer.calculate_required_height(&Rect::default());
                 self.active_view = Some(Box::new(StatusIndicatorView::new(
                     self.app_event_tx.clone(),
-                    height,
                 )));
                 self.request_redraw();
             }
@@ -203,14 +199,6 @@ impl BottomPane<'_> {
     }
 
     /// Height (terminal rows) required by the current bottom pane.
-    pub fn calculate_required_height(&self, area: &Rect) -> u16 {
-        if let Some(view) = &self.active_view {
-            view.calculate_required_height(area)
-        } else {
-            self.composer.calculate_required_height(area)
-        }
-    }
-
     pub(crate) fn request_redraw(&self) {
         self.app_event_tx.send(AppEvent::RequestRedraw)
     }