Add usage-limit rings to the /pet avatar overlay

What variant of Codex are you using?

App

What feature would you like to see?

I would like Codex App's /pet avatar overlay to support usage-limit rings directly inside the avatar overlay window.

The rings could show:

• a primary short-window usage limit, such as the 5h limit
• a secondary longer-window usage limit, such as the weekly limit

Because the rings would be part of the same /pet overlay, they would move, drag, hide, clamp, and resize together with the pet. This would also make the behavior more reliable for custom pets.

Useful options could include:

• enable/disable usage rings
• show rings always or only on hover
• customize ring colors and opacity
• show hover text such as 5h 72% and weekly 41%

Additional information

<img width="227" height="216" alt="Image" src="https://github.com/user-attachments/assets/8b60894e-37c9-4d91-8435-98ca7dd04f5b" />

A separate external overlay can draw similar rings, but it is structurally limited because the pet and rings are separate windows. That makes drag synchronization, z-order, and display changes harder to keep reliable.

Drawing the rings inside the existing /pet avatar overlay would make the feature feel native and avoid fragile companion-window synchronization.