Add an animation to when the Deck shuts down after idle timeout.

[Managor]

Your system information

• Steam client version: 1732746274
• SteamOS version: 3.6.20
• Opted into Steam client beta?: Yes
• Opted into SteamOS beta?: No
• Have you checked for updates in Settings > System?: Yes

Please describe your issue in as much detail as possible:

If the deck shuts down due to idle timeout, it does so with a flash of bright light. To me this felt like it shut down due to battery running out and for a moment I was scared I lost hours worth of progress. What I would suggest is adding another animation for the timeout shutdown. Use the same graphic as with manual sleep, but make it so that the Deck logo "eye" slowly closes as if it falls asleep from being drowsy.

Steps for reproducing this issue:

1. Leave a game on and don't touch the controls (case for when this might happen is very long cutscene

Result:

The deck shuts down in a flash of bright light

Expected:

Some sort of animation to indicate that it was being shut down due to timeout