Forward from the toolbox directly to the group sort interaction mode

[samreid]

From discussion with @zepumph, we would like to share interaction code by forwarding from the toolbox channel "grab" direction to the group sort interaction mode.

I wrote this patch, but it doesn't know how to tell the group sort interaction that the current item is grabbed. @zepumph can you please advise?

Subject: [PATCH] Add TODO
---
Index: ../../phet/root/membrane-channels/js/common/view/MembraneChannelsScreenView.ts
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/../../phet/root/membrane-channels/js/common/view/MembraneChannelsScreenView.ts b/../../phet/root/membrane-channels/js/common/view/MembraneChannelsScreenView.ts
--- a/../../phet/root/membrane-channels/js/common/view/MembraneChannelsScreenView.ts	(revision 05638f0f2ae18126e7b6f12a7dd51aebf54c368d)
+++ b/../../phet/root/membrane-channels/js/common/view/MembraneChannelsScreenView.ts	(date 1740426266196)
@@ -271,7 +271,10 @@
     this.addChild( channelDragNode );
 
     if ( focus ) {
-      channelDragNode.focus();
+      // channelDragNode.focus();
+      this.observationWindow.membraneGroupSortInteractionView.model.selectedGroupItemProperty.value = this.model.getSlotIndex( slot );
+      this.observationWindow.membraneGroupSortInteractionView.model.hasKeyboardGrabbedGroupItemProperty.value = true;
+      this.observationWindow.focus();
     }
 
     // TODO: once keyboarded, prevent mouse+touch, or do this on init
Index: ../../phet/root/scenery-phet/js/accessibility/group-sort/view/GroupSelectView.ts
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/../../phet/root/scenery-phet/js/accessibility/group-sort/view/GroupSelectView.ts b/../../phet/root/scenery-phet/js/accessibility/group-sort/view/GroupSelectView.ts
--- a/../../phet/root/scenery-phet/js/accessibility/group-sort/view/GroupSelectView.ts	(revision 4a7900c0b5578adf1a036b021df30de3b5b99d29)
+++ b/../../phet/root/scenery-phet/js/accessibility/group-sort/view/GroupSelectView.ts	(date 1740426069883)
@@ -88,7 +88,7 @@
   private readonly getNodeFromModelItem: ( model: ItemModel ) => ItemNode | null;
 
   public constructor(
-    protected readonly model: GroupSelectModel<ItemModel>,
+    public readonly model: GroupSelectModel<ItemModel>,
     primaryFocusedNode: Node, // Client is responsible for setting accessibleName and nothing else!
     providedOptions: GroupSelectViewOptions<ItemModel, ItemNode> ) {
 
Index: ../../phet/root/membrane-channels/js/common/view/ObservationWindow.ts
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/../../phet/root/membrane-channels/js/common/view/ObservationWindow.ts b/../../phet/root/membrane-channels/js/common/view/ObservationWindow.ts
--- a/../../phet/root/membrane-channels/js/common/view/ObservationWindow.ts	(revision 05638f0f2ae18126e7b6f12a7dd51aebf54c368d)
+++ b/../../phet/root/membrane-channels/js/common/view/ObservationWindow.ts	(date 1740426069888)
@@ -40,7 +40,7 @@
   private readonly stepEmitter = new Emitter<[ number ]>( {
     parameters: [ { valueType: 'number' } ]
   } );
-  private readonly membraneGroupSortInteractionView: MembraneGroupSortInteractionView;
+  public readonly membraneGroupSortInteractionView: MembraneGroupSortInteractionView;
 
   public constructor( private readonly model: MembraneChannelsModel, view: MembraneChannelsScreenView,
                       public readonly modelViewTransform: ModelViewTransform2, canvasBounds: Bounds2, tandem: Tandem ) {

[zepumph]

I think things are working above. I want to pass it back to review, but then I still want to try to factor out all the Property values into a single, public, API function that can set us up better for forwarding in the future.

[samreid]

Changes and behavior look good. @zepumph want to continue here or in a new issue in scenery-phet?