Show error message after panic (#1752)

Previously we were swallowing errors and silently exiting, which isn't
great for helping users help us.

codex-rs/tui/src/lib.rs

@@ -176,9 +176,13 @@ fn run_ratatui_app(
     color_eyre::install()?;
 
     // Forward panic reports through tracing so they appear in the UI status
-    // line instead of interleaving raw panic output with the interface.
-    std::panic::set_hook(Box::new(|info| {
+    // line, but do not swallow the default/color-eyre panic handler.
+    // Chain to the previous hook so users still get a rich panic report
+    // (including backtraces) after we restore the terminal.
+    let prev_hook = std::panic::take_hook();
+    std::panic::set_hook(Box::new(move |info| {
         tracing::error!("panic: {info}");
+        prev_hook(info);
     }));
     let mut terminal = tui::init(&config)?;
     terminal.clear()?;