fix numpadEnter default shortcut (#87019)

packages/flutter/lib/src/widgets/app.dart

@@ -1152,6 +1152,7 @@ class WidgetsApp extends StatefulWidget {
   static const Map<ShortcutActivator, Intent> _defaultShortcuts = <ShortcutActivator, Intent>{
     // Activation
     SingleActivator(LogicalKeyboardKey.enter): ActivateIntent(),
+    SingleActivator(LogicalKeyboardKey.numpadEnter): ActivateIntent(),
     SingleActivator(LogicalKeyboardKey.space): ActivateIntent(),
     SingleActivator(LogicalKeyboardKey.gameButtonA): ActivateIntent(),
 
@@ -1186,6 +1187,7 @@ class WidgetsApp extends StatefulWidget {
     ),
     // On the web, enter activates buttons, but not other controls.
     SingleActivator(LogicalKeyboardKey.enter): ButtonActivateIntent(),
+    SingleActivator(LogicalKeyboardKey.numpadEnter): ButtonActivateIntent(),
 
     // Dismissal
     SingleActivator(LogicalKeyboardKey.escape): DismissIntent(),
@@ -1207,6 +1209,7 @@ class WidgetsApp extends StatefulWidget {
   static const Map<ShortcutActivator, Intent> _defaultAppleOsShortcuts = <ShortcutActivator, Intent>{
     // Activation
     SingleActivator(LogicalKeyboardKey.enter): ActivateIntent(),
+    SingleActivator(LogicalKeyboardKey.numpadEnter): ActivateIntent(),
     SingleActivator(LogicalKeyboardKey.space): ActivateIntent(),
 
     // Dismissal

packages/flutter/test/widgets/app_test.dart

@@ -139,6 +139,11 @@ void main() {
     await tester.pumpAndSettle();
     expect(checked, isTrue);
 
+    checked = false;
+    await tester.sendKeyEvent(LogicalKeyboardKey.numpadEnter);
+    await tester.pumpAndSettle();
+    expect(checked, isTrue);
+
     checked = false;
     await tester.sendKeyEvent(LogicalKeyboardKey.gameButtonA);
     await tester.pumpAndSettle();