cast from slideshow

lib/view/src/actions/slideshow.dart

@@ -9,6 +9,7 @@ extension ExtraSlideshowActionView on SlideshowAction {
     return switch (this) {
       SlideshowAction.resume => l10n.slideshowActionResume,
       SlideshowAction.showInCollection => l10n.slideshowActionShowInCollection,
+      SlideshowAction.cast => l10n.entryActionCast,
       SlideshowAction.settings => l10n.viewerActionSettings,
     };
   }
@@ -19,6 +20,7 @@ extension ExtraSlideshowActionView on SlideshowAction {
     return switch (this) {
       SlideshowAction.resume => AIcons.play,
       SlideshowAction.showInCollection => AIcons.allCollection,
+      SlideshowAction.cast => AIcons.cast,
       SlideshowAction.settings => AIcons.settings,
     };
   }

lib/widgets/viewer/overlay/slideshow_buttons.dart

@@ -30,6 +30,7 @@ class _SlideshowButtonsState extends State<SlideshowButtons> {
   static const List<SlideshowAction> _actions = [
     SlideshowAction.resume,
     SlideshowAction.showInCollection,
+    SlideshowAction.cast,
     SlideshowAction.settings,
   ];
   static const double _padding = ViewerButtonRowContent.padding;
@@ -116,7 +117,14 @@ class _SlideshowButtonsState extends State<SlideshowButtons> {
     );
   }
 
-  void _onAction(BuildContext context, SlideshowAction action) => SlideshowActionNotification(action).dispatch(context);
+  void _onAction(BuildContext context, SlideshowAction action) {
+    switch (action) {
+      case SlideshowAction.cast:
+        const CastNotification(true).dispatch(context);
+      default:
+        SlideshowActionNotification(action).dispatch(context);
+    }
+  }
 
   void _requestFocus() => _buttonRowFocusScopeNode.children.firstOrNull?.requestFocus();
 }

lib/widgets/viewer/slideshow_page.dart

@@ -125,6 +125,9 @@ class _SlideshowPageState extends State<SlideshowPage> {
         _viewerController.autopilot = true;
       case SlideshowAction.showInCollection:
         _showInCollection();
+      case SlideshowAction.cast:
+        // ignore, as it should be handled at the viewer level
+        break;
       case SlideshowAction.settings:
         _showSettings(context);
     }

plugins/aves_model/lib/src/actions/slideshow.dart

@@ -1,5 +1,6 @@
 enum SlideshowAction {
   resume,
   showInCollection,
+  cast,
   settings,
 }