Codex App: allow custom per-project icons in the sidebar and active project header

What variant of Codex are you using?

App

What feature would you like to see?

Add support for a custom icon per project in the Codex App.

Right now, projects in the app are mainly identified by text. When switching between multiple repos or similarly named projects, it is easy to miss that the wrong project is selected and send a prompt to the wrong workspace.

A per-project icon would provide a fast visual cue and help prevent this mistake.

Suggested MVP:

• allow setting a custom icon for a project
• support SVG initially
• show the icon in the project row in the sidebar
• show the same icon next to the active/open project name
• fall back to the default project/folder icon when no custom icon is set
• allow changing or removing the custom icon later

Why this matters:

• this is primarily an error-prevention feature, not just visual customization
• icons are recognized faster than project names that must be read
• it would reduce mistakes when working across multiple active projects or similar repo names

A workflow similar to PhpStorm would work well here: let the user choose an SVG and use it as the project icon in the UI.

Additional information

I am requesting this because I have already sent a full prompt to the wrong project after not noticing that the active project had changed.

This seems especially relevant for the Codex App because the desktop UI emphasizes project selection and switching between projects in the sidebar.