polish: add fade-out exit animation to ConsoleGameDetail

Add startClose() which plays a 160ms InCubic fade-out before emitting close(). Back/Escape triggers now call startClose() instead of close() directly. visible keeps the item rendered during the exit animation via isClosing flag. Launch path bypasses animation (immediate).

src/qml/ConsoleGameDetail.qml

@@ -19,15 +19,24 @@ Item {
     signal editRequested()
     signal removeRequested()
 
-    visible: game !== null
+    property bool isClosing: false
+
+    visible: game !== null || isClosing
     focus: visible
 
-    Keys.onEscapePressed: detailRoot.close()
+    function startClose() {
+        if (isClosing) return
+        isClosing = true
+        fadeIn.stop()
+        fadeOut.start()
+    }
+
+    Keys.onEscapePressed: detailRoot.startClose()
 
     Connections {
         target: GamepadManager
         function onBackPressed() {
-            if (detailRoot.visible) detailRoot.close()
+            if (detailRoot.visible) detailRoot.startClose()
         }
         function onSelectPressed() {
             if (detailRoot.visible) detailRoot.launch()
@@ -364,16 +373,32 @@ Item {
         }
     }
 
-    NumberAnimation on opacity {
+    NumberAnimation {
         id: fadeIn
-        running: detailRoot.visible
+        target: detailRoot
+        property: "opacity"
         from: 0; to: 1
         duration: 220
         easing.type: Easing.OutCubic
     }
 
+    NumberAnimation {
+        id: fadeOut
+        target: detailRoot
+        property: "opacity"
+        from: 1; to: 0
+        duration: 160
+        easing.type: Easing.InCubic
+        onStopped: {
+            detailRoot.isClosing = false
+            detailRoot.close()
+        }
+    }
+
     onVisibleChanged: {
-        if (visible) {
+        if (visible && !isClosing) {
+            detailRoot.opacity = 0
+            fadeIn.start()
             Qt.callLater(function() { playBtn.forceActiveFocus() })
         }
     }