feat(bug-report): print bug report URL in terminal instead of opening browser (#510) (#528)

Solves #510 
This PR changes the `/bug` command to print the URL into the terminal
(so it works in headless sessions) instead of trying to open a browser.

---------

Co-authored-by: Thibault Sottiaux <tibo@openai.com>

codex-cli/src/components/help-overlay.tsx

@@ -53,7 +53,8 @@ export default function HelpOverlay({
           <Text color="cyan">/clearhistory</Text> – clear command history
         </Text>
         <Text>
-          <Text color="cyan">/bug</Text> – file a bug report with session log
+          <Text color="cyan">/bug</Text> – generate a prefilled GitHub issue URL
+          with session log
         </Text>
         <Text>
           <Text color="cyan">/diff</Text> – view working tree git diff