titleBarOverlay causes setWindowButtonPosition miscalculation in MacOS Tahoe

### Preflight Checklist

- [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/main/CONTRIBUTING.md) for this project.
- [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/main/CODE_OF_CONDUCT.md) that this project adheres to.
- [x] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a bug report that matches the one I want to file, without success.

### Electron Version

38.6.0, 39.1.1

### What operating system(s) are you using?

macOS

### Operating System Version

macOS Tahoe 26.1

### What arch are you using?

arm64 (including Apple Silicon)

### Last Known Working Electron version

37.9.0

### Does the issue also appear in Chromium / Google Chrome?

No

### Expected Behavior

A `BrowserWindow` with a specified `titleBarOverlay` will position the traffic lights differently when calling `setWindowButtonPosition()` from an otherwise identical `BrowserWindow` which has no `tileBarOverlay`.

### Actual Behavior

The presence of a `titleBarOverlay` in the options should not affect the way the traffic light position is calculated when calling `setWindowButtonPosition`.

### Testcase Gist URL

https://gist.github.com/CliftonH/f60af359652b76514895c48402576f5c

### Additional Information

I tested in electron versions 38 and 39 and the issue is present, it seems to work fine in 37. Additionally, this doesn't seem to manifest in macOS Sequoia.