Authorize page inputs are buggy with dev build

[KTibow]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.

Describe the issue you are experiencing

At least in Firefox with the frontend dev build, the inputs on the auth page are acting up. They're both selected, and you need to manually type in your username for it to get your username. See the following video:
Screencast from 2023-10-01 07-48-13.webm

Describe the behavior you expected

The inputs should be unselected until clicked, and autofill should work normally.

Steps to reproduce the issue

1. Get a dev build of the frontend
2. Run a HA server with it
3. Go to the authorize page (using Firefox)

What version of Home Assistant Core has the issue?

Home Assistant 2023.9.3

In which browser are you experiencing the issue with?

Firefox 118.0 (64-bit)

Which operating system are you using to run this browser?

Fedora Linux 38 (Workstation Edition)

Additional information

I believe this was introduced by #18015