[FEATURE] Make context window usage more prominent in macOS app

What feature would you like to see?

The context window indicator in the Codex macOS app is currently buried in the bottom-right corner of the interface. It's easy to miss, which makes it hard to keep track of how much context you've consumed during a session.

I'd like the context window usage to be more prominent — ideally displayed in a more visible location (e.g., the toolbar or top area of the chat), or with a visual treatment that makes it stand out more (progress bar, color changes as it fills up, etc.). Or at least place it in the bottom-left corner where it's normally displayed in Codex CLI/Claude Code.

Knowing how much context remains is critical for deciding when to start a new session or trim the conversation, and the current placement makes this information too easy to overlook.

Environment:

• Codex CLI: codex-cli 0.101.0
• Platform: macOS Tahoe v26.3

Screenshot

<!-- TODO: Add screenshot showing the current placement of the context window indicator -->

Additional information

<img width="860" height="195" alt="Image" src="https://github.com/user-attachments/assets/83279527-f842-4d4f-b502-81b5a1edf126" />