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
parent 5504d3cfb8
commit befed8ff96
80 changed files with 2128 additions and 609 deletions
@@ -0,0 +1,75 @@
+import QtQuick
+import QtQuick.Window
+import org.kde.layershell 1.0 as LayerShell
+import Nebula.UI
+
+Window {
+    id: root
+
+    title: qsTr("Nebula Launcher")
+    color: "transparent"
+    flags: Qt.FramelessWindowHint
+    visible: ShellState.launcherOpen || launcher.opacity > 0.01
+    width: Screen.width
+    height: Screen.height - Theme.topBarHeight
+
+    LayerShell.Window.scope: "nebula-launcher"
+    LayerShell.Window.layer: LayerShell.Window.LayerOverlay
+    LayerShell.Window.anchors: LayerShell.Window.AnchorTop
+        | LayerShell.Window.AnchorBottom
+        | LayerShell.Window.AnchorLeft
+        | LayerShell.Window.AnchorRight
+    LayerShell.Window.margins.top: Theme.topBarHeight
+    LayerShell.Window.exclusionZone: 0
+    LayerShell.Window.keyboardInteractivity: ShellState.launcherOpen
+        ? LayerShell.Window.KeyboardInteractivityExclusive
+        : LayerShell.Window.KeyboardInteractivityNone
+
+    Item {
+        anchors.fill: parent
+        focus: ShellState.launcherOpen
+        Keys.onEscapePressed: {
+            event.accepted = true
+            ShellState.closeLauncher()
+        }
+    }
+
+    MouseArea {
+        anchors.fill: parent
+        acceptedButtons: Qt.LeftButton | Qt.RightButton
+        onClicked: ShellState.closeLauncher()
+    }
+
+    Launcher {
+        id: launcher
+        x: 10
+        y: 10
+        width: Math.min(420, parent.width - 20)
+        height: Math.min(implicitHeight, Math.min(640, parent.height - 24))
+        opacity: ShellState.launcherOpen ? 1 : 0
+        yOffset: ShellState.launcherOpen ? 0 : -6
+        scale: ShellState.launcherOpen ? 1 : 0.985
+        focus: ShellState.launcherOpen
+
+        Behavior on opacity {
+            NumberAnimation {
+                duration: Theme.animationNormal
+                easing.type: Easing.OutCubic
+            }
+        }
+
+        Behavior on yOffset {
+            NumberAnimation {
+                duration: Theme.animationNormal
+                easing.type: Easing.OutCubic
+            }
+        }
+
+        Behavior on scale {
+            NumberAnimation {
+                duration: Theme.animationNormal
+                easing.type: Easing.OutCubic
+            }
+        }
+    }
+}