AI disclosure: I asked GitHub Copilot (Claude Haiku 4.5) "What's the best way to add tests for my recently merged qt theming contributions?" It suggested the insta crate for golden testing the output strings as well as some unit tests. I implemented it myself.
We're now merging the colors with kdeglobals, not replacing it with a symlink. So renaming the file gives us a missing file Io error:
[2026-02-18T20:03:08Z ERROR cosmic_settings_daemon::theme] Failed to apply COSMIC theme exports. Io(Os { code: 2, kind: NotFound, message: "No such file or directory" })
