feat: Auto update approval (#5185)

Adds an update prompt when the CLI starts:

<img width="1410" height="608" alt="Screenshot 2025-10-14 at 5 53 17 PM"
src="https://github.com/user-attachments/assets/47c8bafa-7bed-4be8-b597-c4c6c79756b8"
/>

codex-rs/tui/src/selection_list.rs

@@ -0,0 +1,35 @@
+use crate::render::renderable::Renderable;
+use crate::render::renderable::RowRenderable;
+use ratatui::style::Style;
+use ratatui::style::Styled as _;
+use ratatui::style::Stylize as _;
+use ratatui::widgets::Paragraph;
+use ratatui::widgets::Wrap;
+use unicode_width::UnicodeWidthStr;
+
+pub(crate) fn selection_option_row(
+    index: usize,
+    label: String,
+    is_selected: bool,
+) -> Box<dyn Renderable> {
+    let prefix = if is_selected {
+        format!("› {}. ", index + 1)
+    } else {
+        format!("  {}. ", index + 1)
+    };
+    let style = if is_selected {
+        Style::default().cyan()
+    } else {
+        Style::default()
+    };
+    let prefix_width = UnicodeWidthStr::width(prefix.as_str()) as u16;
+    let mut row = RowRenderable::new();
+    row.push(prefix_width, prefix.set_style(style));
+    row.push(
+        u16::MAX,
+        Paragraph::new(label)
+            .style(style)
+            .wrap(Wrap { trim: false }),
+    );
+    row.into()
+}