Codex Mobile: support web preview artifacts for dev servers and forwarded ports

What variant of Codex are you using?

Codex Mobile

What feature would you like to see?

Add support in Codex Mobile for viewing web development preview artifacts, especially apps running on local, remote, or forwarded dev-server ports.

When Codex builds or edits a web app, the next step is often opening a preview such as a dev server on port 3000, 5173, or 8080, checking the UI, and giving feedback. On mobile, this workflow often requires switching back to a desktop because the running app preview is not accessible from the phone.

Proposed behavior:

• Show a Preview app artifact/card when Codex starts or detects a web dev server.
• Let the user open the running app from Codex Mobile through a secure preview bridge or forwarded-port tunnel.
• Include basic status such as running, stopped, failed, or port unavailable.
• Support refresh/reload controls.
• Ideally support an embedded mobile browser preview and responsive viewport checks.

Additional information

This would reduce the need to use a computer for web-development review loops. A user could ask Codex Mobile to build or modify a web app, tap the preview artifact, inspect the result from the phone, and continue giving feedback from the same mobile workflow.