suppress world interaction while a menu panel is open

DialogueInteractable, DialogueTransitionController, and DialogueUIVisibility are
reworked against the new UI layer: visibility is driven by UIStateController
rather than each component toggling canvases itself, which removes the
duplicated show/hide logic the two had accumulated.

NPCStandIn now ignores the interact button while UIStateController reports a
menu open, so pressing interact through an open panel no longer starts a
conversation behind it.

The yarnproject change is graph-editor node positions only.

Co-Authored-By: Claude Opus 5 <[email protected]>

NightclubArcadia/Assets/Scripts/NPCs/NPCStandIn.cs

@@ -3,6 +3,7 @@ using UnityEngine.InputSystem;
 using TMPro;
 using Yarn.Unity;
 using NightclubArcadia.Dialogue;
+using NightclubArcadia.UI;
 
 /// <summary>
 /// Drop this on a sphere primitive to use it as a placeholder NPC:
@@ -153,6 +154,11 @@ public class NPCStandIn : MonoBehaviour
             return;
         }
 
+        if (UIStateController.Instance != null && UIStateController.Instance.IsMenuOpen)
+        {
+            return;
+        }
+
         if (!dialogueRunner.IsDialogueRunning)
         {
             StartDialogueAsync();