`nativeTheme.shouldUseDarkColorsForSystemIntegratedUI` has an incorrect (inverted) value after the 'updated' event

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a bug report that matches the one I want to file, without success.

Electron Version

41.10.1, 42.6.1, 43.1.0

What operating system(s) are you using?

Windows

Operating System Version

Windows 11 25H2

What arch are you using?

x64

Last Known Working Electron version

39.0.0-beta.3

Does the issue also appear in Chromium / Google Chrome?

I don't know how to test

Expected Behavior

The first call to nativeTheme.shouldUseDarkColorsForSystemIntegratedUI returns the correct value, as described in the docs.

The value read inside the nativeTheme 'updated' event listener is inverted.

function isDark() {
  console.log('isDark', nativeTheme.shouldUseDarkColorsForSystemIntegratedUI)
}

nativeTheme.on('updated', () => isDark()) // inverted value...
isDark() // ok

Actual Behavior

https://github.com/user-attachments/assets/9cd24aca-3f89-4e8d-822f-0534e83ecf78

Testcase Gist URL

https://gist.github.com/c75f4f0c02dfdbad8e410cf650b5d6b5

Additional Information

No response