refactor: remove listener API from artboard property

Author: mfazekas

android/src/main/java/com/margelo/nitro/rive/HybridViewModelArtboardProperty.kt

@@ -13,13 +13,4 @@ class HybridViewModelArtboardProperty(private val property: ViewModelArtboardPro
     val bindable = (artboard as? HybridBindableArtboard)?.bindableArtboard
     property.set(bindable)
   }
-
-  // Android SDK doesn't support listeners on artboard properties
-  override fun addListener(onChanged: () -> Unit): () -> Unit {
-    return {}
-  }
-
-  override fun removeListeners() {
-    // No-op on Android - artboard properties don't support listeners
-  }
 }

ios/BaseHybridViewModelProperty.swift

@@ -66,14 +66,6 @@ extension ListPropertyType: RivePropertyWithListeners {
   }
 }
 
-extension ArtboardPropertyType: RivePropertyWithListeners {
-  typealias ListenerValueType = Void
-
-  func addListener(_ callback: @escaping ListenerType) -> UUID {
-    addListener { _ in callback(()) }
-  }
-}
-
 /// Helper class for managing ViewModel property listeners
 class PropertyListenerHelper<PropertyType: RivePropertyWithListeners> {
   private var listenerIds: [UUID] = []

ios/HybridViewModelArtboardProperty.swift

@@ -1,10 +1,7 @@
 import RiveRuntime
 
-class HybridViewModelArtboardProperty: HybridViewModelArtboardPropertySpec, ValuedPropertyProtocol {
-  typealias ValueType = Void
-
-  var property: ArtboardPropertyType!
-  lazy var helper = PropertyListenerHelper(property: property!)
+class HybridViewModelArtboardProperty: HybridViewModelArtboardPropertySpec {
+  private let property: ArtboardPropertyType
 
   init(property: ArtboardPropertyType) {
     self.property = property
@@ -18,8 +15,4 @@ class HybridViewModelArtboardProperty: HybridViewModelArtboardPropertySpec, Valu
       property.setValue(nil)
     }
   }
-
-  func addListener(onChanged: @escaping () -> Void) throws -> () -> Void {
-    return helper.addListener { _ in onChanged() }
-  }
 }

src/specs/ViewModel.nitro.ts

@@ -162,14 +162,10 @@ export interface ViewModelListProperty
  * This is a write-only property - artboards can be set but not read.
  * @see {@link https://rive.app/docs/runtimes/data-binding Rive Data Binding Documentation}
  */
-export interface ViewModelArtboardProperty
-  extends ViewModelProperty,
-    ObservableProperty {
+export interface ViewModelArtboardProperty extends ViewModelProperty {
   /**
    * Set the artboard for this property.
    * Pass undefined to clear the currently bound artboard.
    */
   set(artboard: BindableArtboard | undefined): void;
-  /** Add a listener called when the artboard property changes. Returns cleanup function. */
-  addListener(onChanged: () => void): () => void;
 }