finalized iOS setup

ios/Runner/SceneDelegate.swift

@@ -0,0 +1,33 @@
+import Flutter
+import UIKit
+import receive_sharing_intent
+
+// FlutterSceneDelegate has a fallback that forwards URL events to plugins
+// registered via addApplicationDelegate, but the fallback is best-effort and
+// has not always fired in our setup. This subclass forwards URLs explicitly
+// to receive_sharing_intent so cold-start and warm shares both reach Dart.
+class SceneDelegate: FlutterSceneDelegate {
+  override func scene(
+    _ scene: UIScene,
+    willConnectTo session: UISceneSession,
+    options connectionOptions: UIScene.ConnectionOptions
+  ) {
+    super.scene(scene, willConnectTo: session, options: connectionOptions)
+    for context in connectionOptions.urlContexts {
+      _ = SwiftReceiveSharingIntentPlugin.instance.application(
+        UIApplication.shared,
+        didFinishLaunchingWithOptions: [UIApplication.LaunchOptionsKey.url: context.url]
+      )
+    }
+  }
+
+  override func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
+    for context in URLContexts {
+      _ = SwiftReceiveSharingIntentPlugin.instance.application(
+        UIApplication.shared,
+        open: context.url,
+        options: [:]
+      )
+    }
+  }
+}