Fix HUD crash, clarify exit dialog, hide hint tile

LayerShell windows with non-spanning anchors (AnchorTop|AnchorRight)
crash the compositor when made invisible because Qt briefly resizes
the surface to 0 before unmapping it. Wrap GamingHUD in a Loader so
the window is destroyed rather than hidden.

Replace the generic 'Yes / Cancel' exit dialog with 'Keep Playing /
Leave' in both the Game Center header and the QS tile, matching the
mental model of a couch user.

The 'Launch Hint' QS tile is now hidden (available: false) when
gaming mode is off so it does not clutter the regular action drawer.

containments/homescreens/folio/qml/gaming/GameCenterOverlay.qml

@@ -172,11 +172,20 @@ Window {
         anchors.fill: parent
 
         sourceComponent: Kirigami.PromptDialog {
-            title: i18n("Exit Gaming Mode")
-            subtitle: i18n("Keep gaming mode enabled, or switch back to the normal shell layout?")
-            standardButtons: Kirigami.Dialog.Yes | Kirigami.Dialog.Cancel
-
-            onAccepted: ShellSettings.Settings.gamingModeEnabled = false
+            id: theExitDialog
+            title: i18n("Leave gaming mode?")
+            subtitle: i18n("Your games will keep running in the background.")
+            standardButtons: Kirigami.Dialog.NoButton
+            customFooterActions: [
+                Kirigami.Action {
+                    text: i18n("Keep Playing")
+                    onTriggered: theExitDialog.close()
+                },
+                Kirigami.Action {
+                    text: i18n("Leave")
+                    onTriggered: ShellSettings.Settings.gamingModeEnabled = false
+                }
+            ]
             onClosed: exitGamingDialog.active = false
         }
     }

containments/homescreens/folio/qml/main.qml

@@ -698,9 +698,14 @@ ContainmentItem {
 
     // Small persistent button at the top-right corner of the screen that lets
     // the user return to the Game Center after launching a game.
-    GamingHUD {
-        visible: ShellSettings.Settings.gamingModeEnabled && !root.gameCenterOpen
-        onOpenRequested: root.gameCenterOpen = true
+    // Wrapped in a Loader so the LayerShell Window is destroyed (not merely
+    // hidden) when not needed — hiding a LayerShell window with AnchorTop|Right
+    // but no fixed height causes a Wayland protocol error (height=0).
+    Loader {
+        active: ShellSettings.Settings.gamingModeEnabled && !root.gameCenterOpen
+        sourceComponent: GamingHUD {
+            onOpenRequested: root.gameCenterOpen = true
+        }
     }
 
     Rectangle {

quicksettings/gaming/contents/ui/main.qml

@@ -35,11 +35,20 @@ QS.QuickSetting {
         active: false
 
         sourceComponent: Kirigami.PromptDialog {
-            title: i18n("Exit Gaming Mode")
-            subtitle: i18n("Switch back to the normal shell layout?")
-            standardButtons: Kirigami.Dialog.Yes | Kirigami.Dialog.Cancel
-
-            onAccepted: ShellSettings.Settings.gamingModeEnabled = false
+            id: theConfirmDialog
+            title: i18n("Leave gaming mode?")
+            subtitle: i18n("Your games will keep running in the background.")
+            standardButtons: Kirigami.Dialog.NoButton
+            customFooterActions: [
+                Kirigami.Action {
+                    text: i18n("Keep Playing")
+                    onTriggered: theConfirmDialog.close()
+                },
+                Kirigami.Action {
+                    text: i18n("Leave")
+                    onTriggered: ShellSettings.Settings.gamingModeEnabled = false
+                }
+            ]
             onClosed: confirmDisableDialog.active = false
         }
     }

quicksettings/gaminghint/contents/ui/main.qml

@@ -7,10 +7,11 @@ import org.kde.plasma.private.mobileshell.shellsettingsplugin as ShellSettings
 import org.kde.plasma.private.mobileshell.quicksettingsplugin as QS
 
 QS.QuickSetting {
-    text: i18n("Game Center Hint")
+    text: i18n("Launch Hint")
     icon: "dialog-information"
     status: ""
     enabled: ShellSettings.Settings.gamingDismissHintEnabled
+    available: ShellSettings.Settings.gamingModeEnabled
 
     function toggle() {
         ShellSettings.Settings.gamingDismissHintEnabled = !ShellSettings.Settings.gamingDismissHintEnabled;