[DiapDealer]

There's already a generic windows dark mode qss resource (:/dark/win-dark-style.qss) that gets loaded by Misc/SigilDarkStyle.cpp (which in turn is loaded on Windows whenever main.cpp determines that windows dark mode is wanted).

That existing resource might be the place to put some changes. Especially if assigning a new qss file/resource to CodeView causes any issues with the default qss.

Preview's scrollbars are styled by css being injected.

@BeckyEbook is pretty handy with this qss stuff. She contributed a lot to the Windows dark mode when we were first tweaking it.