fix(onboarding): restore alert state flag and keep error modal wiring

Author: otaliptus

BDKSwiftExampleWallet/View/OnboardingView.swift

@@ -12,6 +12,7 @@ import SwiftUI
 struct OnboardingView: View {
     @AppStorage("isOnboarding") var isOnboarding: Bool?
     @ObservedObject var viewModel: OnboardingViewModel
+    @State private var showingOnboardingViewErrorAlert = false
     @State private var showingImportView = false
     @State private var showingScanner = false
     let pasteboard = UIPasteboard.general
@@ -218,22 +219,15 @@ struct OnboardingView: View {
                 )
             }
         }
-        .alert(
-            "Onboarding Error",
-            isPresented: Binding(
-                get: { viewModel.onboardingViewError != nil },
-                set: { newValue in
-                    if !newValue {
-                        viewModel.onboardingViewError = nil
-                    }
+        .alert(isPresented: $showingOnboardingViewErrorAlert) {
+            Alert(
+                title: Text("Onboarding Error"),
+                message: Text(viewModel.onboardingViewError?.description ?? "Unknown"),
+                dismissButton: .default(Text("OK")) {
+                    viewModel.onboardingViewError = nil
+                    showingOnboardingViewErrorAlert = false
                 }
             )
-        ) {
-            Button("OK") {
-                viewModel.onboardingViewError = nil
-            }
-        } message: {
-            Text(viewModel.onboardingViewError?.description ?? "Unknown")
         }
         .sheet(isPresented: $showingScanner) {
             CustomScannerView(
@@ -258,6 +252,9 @@ struct OnboardingView: View {
                 animateContent = true
             }
         }
+        .onReceive(viewModel.$onboardingViewError) { error in
+            showingOnboardingViewErrorAlert = (error != nil)
+        }
     }
 }