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andrew befed8ff96 Add Qt/QML desktop shell and Nebula.UI

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.

2026-08-26 16:34:40 +12:00

sway

Update nebula-sway.conf

2026-08-26 16:02:05 +12:00

README.md

Add Qt/QML desktop shell and Nebula.UI

2026-08-26 16:34:40 +12:00

README.md

Compositor

Sway is the temporary Wayland compositor while Nebula Desktop is developed. Configuration lives in sway/nebula-sway.conf.

Sway currently provides:

Wayland compositor
application window management
XWayland
input
output handling

Nebula provides the visible shell (Qt Quick/QML via LayerShellQt). The Sway config must not enable a Sway bar.

A custom Nebula compositor is a later milestone. Do not treat this Sway setup as the final architecture.

Ubuntu/Linux
 ↓
Wayland
 ↓
Sway                 now
Nebula compositor    later
 ↓
Nebula Shell
Qt Quick/QML