fixes build issues related to using ios 14 apis in ios 13 project. restores runnable and listenable on ios.

ios/Runner/CarPlaySceneDelegate.swift

@@ -14,10 +14,11 @@ import UIKit
  * Note: the com.apple.developer.carplay-audio entitlement must be enabled in the
  * Apple Developer Portal and added to the target in Xcode Signing & Capabilities.
  */
-class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
+class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate, CPListTemplateDelegate {
 
   private var carPlayInterfaceController: CPInterfaceController?
   private var listTemplate: CPListTemplate?
+  private var streamItem: CPListItem?
 
   // MARK: - CPTemplateApplicationSceneDelegate
 
@@ -26,7 +27,13 @@ class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
     didConnect interfaceController: CPInterfaceController
   ) {
     carPlayInterfaceController = interfaceController
-    interfaceController.setRootTemplate(makeListTemplate(), animated: false, completion: nil)
+    let rootTemplate = makeListTemplate()
+    if #available(iOS 14.0, *) {
+      interfaceController.setRootTemplate(rootTemplate, animated: false, completion: nil)
+    } else {
+      // iOS 13 fallback: use API variant available before iOS 14.
+      interfaceController.setRootTemplate(rootTemplate, animated: false)
+    }
   }
 
   func templateApplicationScene(
@@ -41,7 +48,6 @@ class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
   // MARK: - Template construction
 
   private func makeListTemplate() -> CPListTemplate {
-    let artwork = CPListItem.maximumImageSize
     let icon = UIImage(named: "AppIcon")?
       .withRenderingMode(.alwaysOriginal)
 
@@ -50,19 +56,29 @@ class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
       detailText: "KRYZ Radio",
       image: icon
     )
-    item.handler = { [weak self] _, completion in
-      self?.handleStreamItemTapped()
-      completion()
+    streamItem = item
+
+    if #available(iOS 14.0, *) {
+      item.handler = { [weak self] _, completion in
+        self?.handleStreamItemTapped()
+        completion()
+      }
     }
 
     let section = CPListSection(items: [item])
     let template = CPListTemplate(title: "KRYZ Go!", sections: [section])
-    template.tabTitle = "KRYZ Go!"
-    template.tabImage = icon
+
+    if #unavailable(iOS 14.0) {
+      // iOS 13 fallback: use list delegate selection callback.
+      template.delegate = self
+    }
+
+    if #available(iOS 14.0, *) {
+      template.tabTitle = "KRYZ Go!"
+      template.tabImage = icon
+    }
 
     listTemplate = template
-    // Silence unused-variable warning
-    _ = artwork
     return template
   }
 
@@ -70,11 +86,20 @@ class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
 
   private func handleStreamItemTapped() {
     appDelegate?.invokePlay()
-    carPlayInterfaceController?.pushTemplate(
-      CPNowPlayingTemplate.shared,
-      animated: true,
-      completion: nil
-    )
+    guard let interfaceController = carPlayInterfaceController else {
+      return
+    }
+
+    if #available(iOS 14.0, *) {
+      interfaceController.pushTemplate(
+        CPNowPlayingTemplate.shared,
+        animated: true,
+        completion: nil
+      )
+    } else {
+      // iOS 13 fallback: no CPNowPlayingTemplate.shared API.
+      // Keep playback running and remain on the list template.
+    }
   }
 
   // MARK: - Helpers
@@ -82,4 +107,20 @@ class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
   private var appDelegate: AppDelegate? {
     UIApplication.shared.delegate as? AppDelegate
   }
+
+  // MARK: - CPListTemplateDelegate (iOS 13 fallback)
+
+  func listTemplate(
+    _ listTemplate: CPListTemplate,
+    didSelect item: CPListItem,
+    completionHandler: @escaping () -> Void
+  ) {
+    defer { completionHandler() }
+
+    guard item == streamItem else {
+      return
+    }
+
+    handleStreamItemTapped()
+  }
 }