Introduce a new production desktop shell at `shells/desktop/shell` built with C++20, Qt Quick/QML, and LayerShellQt, including top bar, launcher, desktop surfaces, shell state, and mock app data. Add the shared `packages/nebula-ui` QML module (theme, controls, focus, icons) and wire it into the shell build. Retire the old GTK/WebKit native host by removing `shells/desktop/native`, move the React shell UI to `shells/desktop/prototype-react` as an archived design reference, and update root/compositor/session documentation to reflect the new Linux-only production architecture and temporary Sway role.
Nebula.UI
Shared Qt Quick/QML design system for NebulaOS shells.
Desktop and the future Bigscreen shell should both import:
import Nebula.UI
This module contains reusable visual language only:
- colour, spacing, type, and motion tokens (
Theme) - generic controls (
NebulaButton,NebulaCard,NebulaIconButton,NebulaTextField) - focus treatment (
FocusFrame) - compact vector icons (
NebulaIcon)
Do not put Desktop- or Bigscreen-specific chrome here (top bar, launcher, session flow).
Built as part of shells/desktop/shell. It is not a standalone application.