CupertinoButton: Add clickable cursor on web (#96863)

packages/flutter/lib/src/cupertino/button.dart

@@ -245,7 +245,9 @@ class _CupertinoButtonState extends State<CupertinoButton> with SingleTickerProv
 
     final TextStyle textStyle = themeData.textTheme.textStyle.copyWith(color: foregroundColor);
 
-    return GestureDetector(
+    return MouseRegion(
+      cursor: enabled && kIsWeb ? SystemMouseCursors.click : MouseCursor.defer,
+      child: GestureDetector(
         behavior: HitTestBehavior.opaque,
         onTapDown: enabled ? _handleTapDown : null,
         onTapUp: enabled ? _handleTapUp : null,
@@ -290,6 +292,7 @@ class _CupertinoButtonState extends State<CupertinoButton> with SingleTickerProv
             ),
           ),
         ),
+      ),
     );
   }
 }

packages/flutter/test/cupertino/button_test.dart

@@ -3,6 +3,8 @@
 // found in the LICENSE file.
 
 import 'package:flutter/cupertino.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -451,6 +453,33 @@ void main() {
     ).decoration as BoxDecoration;
     expect(decoration.color, isSameColorAs(CupertinoColors.systemBlue.darkColor));
   });
+
+  testWidgets('Hovering over Cupertino button updates cursor to clickable on Web', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      CupertinoApp(
+        home: Center(
+          child: CupertinoButton.filled(
+            onPressed: () { },
+            child: const Text('Tap me'),
+          ),
+        ),
+      ),
+    );
+
+    final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse, pointer: 1);
+    await gesture.addPointer(location: const Offset(10, 10));
+    await tester.pumpAndSettle();
+    expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.basic);
+
+    final Offset button = tester.getCenter(find.byType(CupertinoButton));
+    await gesture.moveTo(button);
+    addTearDown(gesture.removePointer);
+    await tester.pumpAndSettle();
+    expect(
+      RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1),
+      kIsWeb ? SystemMouseCursors.click : SystemMouseCursors.basic,
+    );
+  });
 }
 
 Widget boilerplate({ required Widget child }) {