Fix: Ensure node name is included in onPanEnd and onRotationEnd callbacks

- Fixed serializeLocalTransformation to handle nil nodes gracefully
- Changed transform array from optional to non-optional Float array
- Changed node name from optional to non-optional String
- Store node reference before clearing panningNode to prevent nil access
- Only invoke onPanEnd/onRotationEnd if node exists

This fixes the issue where call.arguments["name"] was nil, causing
the Dart callback handler to fail silently in the catch block.

Author: nikkon404

ios/Classes/IosARView.swift

@@ -626,10 +626,14 @@ class IosARView: NSObject, FlutterPlatformView, ARSCNViewDelegate, UIGestureReco
         // State Ended
         if(recognizer.state == UIGestureRecognizer.State.ended)
         {
+            // Store node reference before clearing it
+            let nodeToSerialize = panningNode
             // kill variables
             panStartLocation = nil
             panCurrentLocation = nil
-            DispatchQueue.main.async {self.objectManagerChannel.invokeMethod("onPanEnd", arguments: serializeLocalTransformation(node: self.panningNode))}
+            if let node = nodeToSerialize {
+                DispatchQueue.main.async {self.objectManagerChannel.invokeMethod("onPanEnd", arguments: serializeLocalTransformation(node: node))}
+            }
             panningNode = nil
         }
     }
@@ -688,10 +692,14 @@ class IosARView: NSObject, FlutterPlatformView, ARSCNViewDelegate, UIGestureReco
         // State Ended
         if(recognizer.state == UIGestureRecognizer.State.ended)
         {
+            // Store node reference before clearing it
+            let nodeToSerialize = panningNode
             // kill variables
             rotation = nil
             rotationVelocity = nil
-            DispatchQueue.main.async {self.objectManagerChannel.invokeMethod("onRotationEnd", arguments: serializeLocalTransformation(node: self.panningNode))}
+            if let node = nodeToSerialize {
+                DispatchQueue.main.async {self.objectManagerChannel.invokeMethod("onRotationEnd", arguments: serializeLocalTransformation(node: node))}
+            }
             panningNode = nil
         }
 

ios/Classes/Serialization/Serializers.swift

@@ -42,9 +42,14 @@ func serializeAnchor(anchor: ARAnchor, anchorNode: SCNNode?, ganchor: GARAnchor,
 func serializeLocalTransformation(node: SCNNode?) -> Dictionary<String, Any?> {
     var serializedLocalTransformation = Dictionary<String, Any?>()
 
-    let transform: [Float?] = [node?.transform.m11, node?.transform.m12, node?.transform.m13, node?.transform.m14, node?.transform.m21, node?.transform.m22, node?.transform.m23, node?.transform.m24, node?.transform.m31, node?.transform.m32, node?.transform.m33, node?.transform.m34, node?.transform.m41, node?.transform.m42, node?.transform.m43, node?.transform.m44]
+    guard let node = node else {
+        // Return empty dictionary if node is nil to prevent crashes
+        return serializedLocalTransformation
+    }
+
+    let transform: [Float] = [node.transform.m11, node.transform.m12, node.transform.m13, node.transform.m14, node.transform.m21, node.transform.m22, node.transform.m23, node.transform.m24, node.transform.m31, node.transform.m32, node.transform.m33, node.transform.m34, node.transform.m41, node.transform.m42, node.transform.m43, node.transform.m44]
 
-    serializedLocalTransformation["name"] = node?.name
+    serializedLocalTransformation["name"] = node.name
     serializedLocalTransformation["transform"] = transform
 
     return serializedLocalTransformation