fix: Add item management and update handling in messenger

Introduces a new private field `_itemKeys` to store item keys. Adds the `SetItems` method to manage item actions and update events, ensuring proper registration and cleanup. The `SendFullStatus` method is now invoked from a dedicated event handler `LocalItem_ItemUpdated`, improving the handling of item updates.

src/PepperDash.Essentials.MobileControl.Messengers/Messengers/ISelectableItemsMessenger.cs

@@ -16,6 +16,8 @@ namespace PepperDash.Essentials.AppServer.Messengers
 
         private readonly string _propName;
 
+        private List<string> _itemKeys = new List<string>();
+
         /// <summary>
         /// Constructs a messenger for a device that implements ISelectableItems<typeparamref name="TKey"/>
         /// </summary>
@@ -41,7 +43,7 @@ namespace PepperDash.Essentials.AppServer.Messengers
 
             itemDevice.ItemsUpdated += (sender, args) =>
             {
-                SendFullStatus();
+                SetItems();
             };
 
             itemDevice.CurrentItemChanged += (sender, args) =>
@@ -49,6 +51,22 @@ namespace PepperDash.Essentials.AppServer.Messengers
                 SendFullStatus();
             };
 
+            SetItems();
+        }
+
+        /// <summary>
+        /// Sets the items and registers their update events
+        /// </summary>
+        private void SetItems()
+        {
+            /// Clear out any existing item actions
+            foreach (var item in _itemKeys)
+            {
+                RemoveAction($"/{item}");
+            }
+
+            _itemKeys.Clear();
+
             foreach (var input in itemDevice.Items)
             {
                 var key = input.Key;
@@ -59,13 +77,18 @@ namespace PepperDash.Essentials.AppServer.Messengers
                     localItem.Select();
                 });
 
-                localItem.ItemUpdated += (sender, args) =>
+                _itemKeys.Add(key.ToString());
-                {
+
-                    SendFullStatus();
+                localItem.ItemUpdated -= LocalItem_ItemUpdated;
-                };
+                localItem.ItemUpdated += LocalItem_ItemUpdated;
             }
         }
 
+        private void LocalItem_ItemUpdated(object sender, EventArgs e)
+        {
+            SendFullStatus();
+        }
+
         private void SendFullStatus(string id = null)
         {
             try