Issue #6: Always reflect current state of NEDNSSettingsManager.

dns/HomeView.swift

@@ -3,6 +3,9 @@ import SwiftUI
 
 struct HomeView: View {
 
+    @Environment(\.scenePhase)
+    private var scenePhase
+
     @EnvironmentObject
     private var viewModel: ViewModel
 
@@ -204,6 +207,13 @@ struct HomeView: View {
             }
             .navigationTitle(ViewModel.title)
             .animation(.default, value: viewModel.isDnsEnabled)
+            .onChange(of: scenePhase) { _, newPhase in
+                if newPhase == .active {
+                    Task {
+                        await viewModel.refreshConfig()
+                    }
+                }
+            }
         }
     }
 }