Fix flickering media play button

[jpbede]

Proposed change

Fix flickering media play button when hovering, introduced with #23760, by removing the existing :hover and directly setting the bg-color and color from the beginning.

Before:

Bildschirmaufnahme.2025-01-17.um.18.50.05.mov

Now:

Bildschirmaufnahme.2025-01-17.um.18.57.38.mov

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[wendevlin]

👍