spotlight: fix clipping and add context menu keyboard navigation (#840)

* spotlight: fix clipping and add context menu keyboard navigation

* prime: also detect nvidia-offload command

* spotlight: fix review nitpicks

quickshell/Modals/Spotlight/SpotlightContextMenuPopup.qml

@@ -0,0 +1,88 @@
+import QtQuick
+import QtQuick.Controls
+import Quickshell
+import qs.Common
+import qs.Modals.Spotlight
+
+Popup {
+    id: root
+
+    property var appLauncher: null
+    property var parentHandler: null
+    property var searchField: null
+
+    function show(x, y, app, fromKeyboard) {
+        fromKeyboard = fromKeyboard || false;
+        menuContent.currentApp = app;
+        
+        root.x = x + 4;
+        root.y = y + 4;
+        
+        menuContent.selectedMenuIndex = fromKeyboard ? 0 : -1;
+        menuContent.keyboardNavigation = true;
+        
+        if (parentHandler) {
+            parentHandler.enabled = false;
+        }
+        
+        open();
+    }
+    
+    onOpened: {
+        Qt.callLater(() => {
+            menuContent.keyboardHandler.forceActiveFocus();
+        });
+    }
+
+    function hide() {
+        if (parentHandler) {
+            parentHandler.enabled = true;
+        }
+        close();
+    }
+
+    width: menuContent.implicitWidth
+    height: menuContent.implicitHeight
+    padding: 0
+    closePolicy: Popup.CloseOnEscape | Popup.CloseOnPressOutside
+    modal: true
+    dim: false
+    background: Item {}
+
+    onClosed: {
+        if (parentHandler) {
+            parentHandler.enabled = true;
+        }
+        if (searchField) {
+            Qt.callLater(() => {
+                searchField.forceActiveFocus();
+            });
+        }
+    }
+
+    enter: Transition {
+        NumberAnimation {
+            property: "opacity"
+            from: 0
+            to: 1
+            duration: Theme.shortDuration
+            easing.type: Theme.emphasizedEasing
+        }
+    }
+
+    exit: Transition {
+        NumberAnimation {
+            property: "opacity"
+            from: 1
+            to: 0
+            duration: Theme.shortDuration
+            easing.type: Theme.emphasizedEasing
+        }
+    }
+
+    contentItem: SpotlightContextMenuContent {
+        id: menuContent
+        appLauncher: root.appLauncher
+        onHideRequested: root.hide()
+    }
+}