feat(tui): Display keyboard shortcuts inline for approval options (#5889)

Shows single-key shortcuts (y, a, n) next to approval options to make
them more discoverable. Previously these shortcuts worked but were
hidden, making the feature hard to discover.

Changes:
- "Yes, proceed" now shows "y" shortcut
- "Yes, and don't ask again" now shows "a" shortcut
- "No, and tell Codex..." continues to show "esc" shortcut

This improves UX by surfacing the quick keyboard shortcuts that were
already functional but undiscoverable in the UI.

---

Update:

added parentheses for better visual clarity 
<img width="1540" height="486" alt="CleanShot 2025-11-05 at 11 47 07@2x"
src="https://github.com/user-attachments/assets/f951c34a-9ec8-4b81-b151-7b2ccba94658"
/>

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Eric Traut <etraut@openai.com>

codex-rs/tui/src/bottom_pane/selection_popup_common.rs

@@ -3,6 +3,7 @@ use ratatui::layout::Rect;
 // Note: Table-based layout previously used Constraint; the manual renderer
 // below no longer requires it.
 use ratatui::style::Color;
+use ratatui::style::Style;
 use ratatui::style::Stylize;
 use ratatui::text::Line;
 use ratatui::text::Span;
@@ -96,8 +97,9 @@ fn build_full_line(row: &GenericDisplayRow, desc_col: usize) -> Line<'static> {
     let this_name_width = Line::from(name_spans.clone()).width();
     let mut full_spans: Vec<Span> = name_spans;
     if let Some(display_shortcut) = row.display_shortcut {
-        full_spans.push(" ".into());
+        full_spans.push(" (".into());
         full_spans.push(display_shortcut.into());
+        full_spans.push(")".into());
     }
     if let Some(desc) = row.description.as_ref() {
         let gap = desc_col.saturating_sub(this_name_width);
@@ -179,8 +181,9 @@ pub(crate) fn render_rows(
         );
         if Some(i) == state.selected_idx {
             // Match previous behavior: cyan + bold for the selected row.
+            // Reset the style first to avoid inheriting dim from keyboard shortcuts.
             full_line.spans.iter_mut().for_each(|span| {
-                span.style = span.style.fg(Color::Cyan).bold();
+                span.style = Style::default().fg(Color::Cyan).bold();
             });
         }