Module prefs

Theme preference / mode types and per-asset specification structs.

Structs

• LauncherSpec
  Styling for the application launcher surface.
• WallpaperSpec
  Wallpaper backing for a single theme variant.
• WindowControlsSpec
  Styling for compositor / window-decoration controls.

Enums

• ThemeMode
  Which of the two variants a theme family resolves to.
• ThemePreference
  Shell-side persisted preference. Auto is resolved to a ThemeMode before reaching ltk — the toolkit itself only knows about Light and Dark.
• WallpaperFit
  How a wallpaper image is fitted to its surface.