Refine Settings and About sheets

Make Settings/About sheets easier to dismiss via close affordances and
press-outside behavior.
Lazy-load the AboutPage to avoid KirigamiAddons null window warnings.
Simplify About metadata and provide non-empty license text.

src/qml/Main.qml

@@ -39,6 +39,10 @@ Kirigami.ApplicationWindow {
             settingsSheet.close()
             return true
         }
+        if (aboutSheet.opened) {
+            aboutSheet.close()
+            return true
+        }
         if (sidebar.modal && sidebar.opened) {
             sidebar.close()
             return true
@@ -59,6 +63,7 @@ Kirigami.ApplicationWindow {
         return !gameEditDialog.visible
             && !detailsSheet.opened
             && !importSheet.opened
+            && !aboutSheet.opened
             && !sidebar.opened
             && root.pageStack.layers.depth <= 1
     }
@@ -160,42 +165,6 @@ Kirigami.ApplicationWindow {
         }
     }
 
-    Component {
-        id: aboutPageComponent
-        FormCard.AboutPage {
-            title: i18n("About")
-            aboutData: ({
-                "displayName": i18n("A-La-Karte"),
-                "componentName": "alakarte",
-                "shortDescription": i18n("A unified game launcher for KDE Plasma"),
-                "homepage": "",
-                "bugAddress": "",
-                "version": Qt.application.version,
-                "otherText": "",
-                "authors": [
-                    {
-                        "name": i18n("A-La-Karte Contributors"),
-                        "task": i18n("Contributors"),
-                        "emailAddress": "",
-                        "webAddress": "",
-                        "ocsUsername": ""
-                    }
-                ],
-                "credits": [],
-                "translators": [],
-                "licenses": [
-                    {
-                        "name": i18n("GNU General Public License v3.0 or later"),
-                        "text": "",
-                        "spdx": "GPL-3.0-or-later"
-                    }
-                ],
-                "copyrightStatement": i18n("© 2026 A-La-Karte Contributors"),
-                "desktopFileName": "org.kde.alakarte"
-            })
-        }
-    }
-
     globalDrawer: Kirigami.OverlayDrawer {
         id: sidebar
         edge: Qt.LeftEdge
@@ -286,7 +255,7 @@ Kirigami.ApplicationWindow {
                     if (sidebar.modal) {
                         sidebar.close()
                     }
-                    root.pageStack.layers.push(aboutPageComponent)
+                    aboutSheet.open()
                 }
             }
         }
@@ -671,6 +640,8 @@ Kirigami.ApplicationWindow {
         id: settingsSheet
         title: i18n("Settings")
 
+        closePolicy: QQC2.Popup.CloseOnEscape | QQC2.Popup.CloseOnPressOutside
+
         implicitWidth: {
             if (root.isMobile) return applicationWindow().width
             if (root.isNarrowScreen) return applicationWindow().width - Kirigami.Units.largeSpacing * 2
@@ -678,12 +649,50 @@ Kirigami.ApplicationWindow {
         }
         implicitHeight: {
             if (root.isMobile) return applicationWindow().height
-            return Math.min(applicationWindow().height - Kirigami.Units.gridUnit * 2, settingsContent.implicitHeight + Kirigami.Units.gridUnit * 2)
+            return Math.min(applicationWindow().height - Kirigami.Units.gridUnit * 2, Kirigami.Units.gridUnit * 42)
         }
 
         onOpened: settingsContent.focusFirstControl()
         onClosed: libraryView.restoreFocus()
 
+        header: Kirigami.ShadowedRectangle {
+            id: settingsHeader
+            implicitWidth: settingsSheet.implicitWidth
+            implicitHeight: settingsHeaderRow.implicitHeight + Kirigami.Units.largeSpacing * 2
+
+            radius: Kirigami.Units.mediumSpacing
+            color: Kirigami.Theme.backgroundColor
+
+            shadow {
+                size: Kirigami.Units.smallSpacing
+                color: Qt.rgba(0, 0, 0, 0.20)
+            }
+
+            RowLayout {
+                id: settingsHeaderRow
+                anchors.fill: parent
+                anchors.margins: Kirigami.Units.largeSpacing
+                spacing: Kirigami.Units.mediumSpacing
+
+                Kirigami.Heading {
+                    text: settingsSheet.title
+                    level: 2
+                    Layout.fillWidth: true
+                    elide: Text.ElideRight
+                }
+
+                QQC2.ToolButton {
+                    text: i18n("Close")
+                    icon.name: "dialog-close"
+                    display: QQC2.AbstractButton.IconOnly
+                    onClicked: settingsSheet.close()
+
+                    QQC2.ToolTip.visible: hovered
+                    QQC2.ToolTip.text: text
+                }
+            }
+        }
+
         function isDescendant(item, ancestor) {
             let p = item
             while (p) {
@@ -700,9 +709,11 @@ Kirigami.ApplicationWindow {
             for (let i = 0; i < 50; i++) {
                 next = next.nextItemInFocusChain(forward)
                 if (!next) return
-                if (settingsSheet.isDescendant(next, settingsContent)) {
+                if (settingsSheet.isDescendant(next, settingsSheet)) {
                     next.forceActiveFocus()
+                    if (settingsSheet.isDescendant(next, settingsContent)) {
                         settingsScroll.ensureItemVisible(next)
+                    }
                     return
                 }
             }
@@ -788,6 +799,96 @@ Kirigami.ApplicationWindow {
         }
     }
 
+    Kirigami.OverlaySheet {
+        id: aboutSheet
+        title: i18n("About")
+
+        closePolicy: QQC2.Popup.CloseOnEscape | QQC2.Popup.CloseOnPressOutside
+
+        implicitWidth: {
+            if (root.isMobile) return applicationWindow().width
+            if (root.isNarrowScreen) return applicationWindow().width - Kirigami.Units.largeSpacing * 2
+            return Math.min(applicationWindow().width - Kirigami.Units.gridUnit * 2, Kirigami.Units.gridUnit * 30)
+        }
+        implicitHeight: {
+            if (root.isMobile) return applicationWindow().height
+            return Math.min(applicationWindow().height - Kirigami.Units.gridUnit * 2, Kirigami.Units.gridUnit * 42)
+        }
+
+        onClosed: libraryView.restoreFocus()
+
+        header: Kirigami.ShadowedRectangle {
+            id: aboutHeader
+            implicitWidth: aboutSheet.implicitWidth
+            implicitHeight: aboutHeaderRow.implicitHeight + Kirigami.Units.largeSpacing * 2
+
+            radius: Kirigami.Units.mediumSpacing
+            color: Kirigami.Theme.backgroundColor
+
+            shadow {
+                size: Kirigami.Units.smallSpacing
+                color: Qt.rgba(0, 0, 0, 0.20)
+            }
+
+            RowLayout {
+                id: aboutHeaderRow
+                anchors.fill: parent
+                anchors.margins: Kirigami.Units.largeSpacing
+                spacing: Kirigami.Units.mediumSpacing
+
+                Kirigami.Heading {
+                    text: aboutSheet.title
+                    level: 2
+                    Layout.fillWidth: true
+                    elide: Text.ElideRight
+                }
+
+                QQC2.ToolButton {
+                    text: i18n("Close")
+                    icon.name: "dialog-close"
+                    display: QQC2.AbstractButton.IconOnly
+                    onClicked: aboutSheet.close()
+
+                    QQC2.ToolTip.visible: hovered
+                    QQC2.ToolTip.text: text
+                }
+            }
+        }
+
+        contentItem: Item {
+            Loader {
+                id: aboutPageLoader
+                anchors.fill: parent
+                active: aboutSheet.opened
+
+                sourceComponent: FormCard.AboutPage {
+                    title: i18n("About")
+                    aboutData: ({
+                        "displayName": i18n("A-La-Karte"),
+                        "componentName": "alakarte",
+                        "shortDescription": i18n("A unified game launcher for KDE Plasma"),
+                        "homepage": "",
+                        "bugAddress": "",
+                        "version": Qt.application.version,
+                        "otherText": "",
+                        "authors": [],
+                        "credits": [],
+                        "translators": [],
+                        "licenses": [
+                            {
+                                "name": i18n("GNU General Public License v3.0 or later"),
+                                "text": "This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.\n\nThe full license text is available at:\nhttps://www.gnu.org/licenses/gpl-3.0.txt",
+                                "spdx": "GPL-3.0-or-later"
+                            }
+                        ],
+                        "copyrightStatement": "",
+                        "desktopFileName": "org.kde.alakarte"
+                    })
+                }
+            }
+        }
+    }
+
     GameEditDialog {
         id: gameEditDialog
         parent: root.overlay