Add an in-app preview for installed Codex Pets

What variant of Codex are you using?

Codex App / Desktop

What feature would you like to see?

Summary

Please consider adding a lightweight in-app preview for installed Codex Pets.

From the existing Pet picker or settings, a user could open the selected Pet in an expanded preview and inspect its available animations on demand.

Proposed experience

For an installed built-in or custom Pet:

• Open a preview from the existing Pet picker or settings.
• Render the Pet at a larger, inspection-friendly size.
• Select and replay the animation states available for that Pet.
• Provide simple controls such as replay and play/pause.
• Optionally show a transparency checkerboard.

The preview should reuse the same renderer, assets, animation definitions, timing, and runtime behavior used by the desktop Pet, so it reflects what users will actually see in Codex.

Scope

This is a lightweight viewer for existing Pets. It should remain local, read-only, and additive: opening the preview leaves the active task and installed Pet unchanged.

Relationship to #20863

Both features can evolve independently. #20863 focuses on defining richer Pet animation sequences and activity mappings; this request focuses on previewing the Pet behavior Codex already knows how to render.

Additional information

No response

Start from the existing Pet picker or settings entry point and trace how installed Pets use the desktop renderer, assets, animation definitions, timing, and runtime behavior. Define the preview around those existing paths, keeping it local, read-only, and additive. Done means an installed built-in or custom Pet can be opened at a larger size, its available animations can be selected and replayed, and the active task and Pet remain unchanged.