### 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 feature request that matches the one I want to file, without success.

### Problem Description

Developer cannot change caption bar theme. It remains white even if windows theme is set to dark.

### Proposed Solution

When themesource in electron is set to dark, use dwm window attributes or check an example here: [Notepad++ Source code](https://github.com/notepad-plus-plus/notepad-plus-plus/tree/master/PowerEditor/src/DarkMode)

### Alternatives Considered

Check out in Notepad++, Sublime Text, Windows Explorer, MSYS Console...

### Additional Information

_No response_
shell/browser/win/dark_mode.cc
static bool initialized = false;
  if (!initialized) {
    initialized = true;
    ::InitDarkMode();
  }
}
bool IsDarkPreferred(ui::NativeTheme::ThemeSource theme_source) {
  switch (theme_source) {
    case ui::NativeTheme::ThemeSource::kForcedLight:
      return false;
    case ui::NativeTheme::ThemeSource::kForcedDark:
      return g_darkModeSupported;
    case ui::NativeTheme::ThemeSource::kSystem:
      return g_darkModeEnabled;
  }
}
namespace win {
void SetDarkModeForWindow(HWND hWnd,
                          ui::NativeTheme::ThemeSource theme_source) {
  EnsureInitialized();
  RefreshTitleBarThemeColor(hWnd, IsDarkPreferred(theme_source));
}
}  
}