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/tui.rs

@@ -4,31 +4,39 @@ use std::io::stdout;
 
 use codex_core::config::Config;
 use crossterm::event::DisableBracketedPaste;
-use crossterm::event::DisableMouseCapture;
 use crossterm::event::EnableBracketedPaste;
 use ratatui::Terminal;
+use ratatui::TerminalOptions;
+use ratatui::Viewport;
 use ratatui::backend::CrosstermBackend;
 use ratatui::crossterm::execute;
-use ratatui::crossterm::terminal::EnterAlternateScreen;
-use ratatui::crossterm::terminal::LeaveAlternateScreen;
 use ratatui::crossterm::terminal::disable_raw_mode;
 use ratatui::crossterm::terminal::enable_raw_mode;
 
-use crate::mouse_capture::MouseCapture;
-
 /// A type alias for the terminal type used in this application
 pub type Tui = Terminal<CrosstermBackend<Stdout>>;
 
-/// Initialize the terminal
-pub fn init(config: &Config) -> Result<(Tui, MouseCapture)> {
-    execute!(stdout(), EnterAlternateScreen)?;
+/// Initialize the terminal (inline viewport; history stays in normal scrollback)
+pub fn init(_config: &Config) -> Result<Tui> {
     execute!(stdout(), EnableBracketedPaste)?;
-    let mouse_capture = MouseCapture::new_with_capture(!config.tui.disable_mouse_capture)?;
 
     enable_raw_mode()?;
     set_panic_hook();
-    let tui = Terminal::new(CrosstermBackend::new(stdout()))?;
-    Ok((tui, mouse_capture))
+
+    // Reserve a fixed number of lines for the interactive viewport (composer,
+    // status, popups). History is injected above using `insert_before`. This
+    // is an initial step of the refactor – later the height can become
+    // dynamic. For now a conservative default keeps enough room for the
+    // multi‑line composer while not occupying the whole screen.
+    const BOTTOM_VIEWPORT_HEIGHT: u16 = 8;
+    let backend = CrosstermBackend::new(stdout());
+    let tui = Terminal::with_options(
+        backend,
+        TerminalOptions {
+            viewport: Viewport::Inline(BOTTOM_VIEWPORT_HEIGHT),
+        },
+    )?;
+    Ok(tui)
 }
 
 fn set_panic_hook() {
@@ -41,14 +49,7 @@ fn set_panic_hook() {
 
 /// Restore the terminal to its original state
 pub fn restore() -> Result<()> {
-    // We are shutting down, and we cannot reference the `MouseCapture`, so we
-    // categorically disable mouse capture just to be safe.
-    if execute!(stdout(), DisableMouseCapture).is_err() {
-        // It is possible that `DisableMouseCapture` is written more than once
-        // on shutdown, so ignore the error in this case.
-    }
     execute!(stdout(), DisableBracketedPaste)?;
-    execute!(stdout(), LeaveAlternateScreen)?;
     disable_raw_mode()?;
     Ok(())
 }