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()
+                    }
+                }
+            }
         }
     }
 }

dns/ViewModel.swift

@@ -53,30 +53,7 @@ class ViewModel: NSObject, ObservableObject {
         super.init()
 
         Task {
-            do {
-                try await manager.loadFromPreferences()
-            }
-            catch {
-                log.error("Error loading preferences: \(error)")
-            }
-
-            isDnsEnabled = manager.isEnabled
-
-            if let settings = manager.dnsSettings {
-                for dnsServer in BlocklistOption.allCases {
-                    if settings.servers.contains(dnsServer.ipv4) {
-                        await MainActor.run {
-                            blocklist = dnsServer
-                        }
-
-                        break
-                    }
-                }
-            }
-            else {
-                // Trigger `blocklist.didSet` to store right away, so user has something to select.
-                blocklist = blocklist
-            }
+            await refreshConfig()
         }
 
         Task {
@@ -87,6 +64,33 @@ class ViewModel: NSObject, ObservableObject {
 
     // MARK: Public Methods
 
+    func refreshConfig() async {
+        do {
+            try await manager.loadFromPreferences()
+        }
+        catch {
+            log.error("Error loading preferences: \(error)")
+        }
+
+        isDnsEnabled = manager.isEnabled
+
+        if let settings = manager.dnsSettings {
+            for dnsServer in BlocklistOption.allCases {
+                if settings.servers.contains(dnsServer.ipv4) {
+                    await MainActor.run {
+                        blocklist = dnsServer
+                    }
+
+                    break
+                }
+            }
+        }
+        else {
+            // Trigger `blocklist.didSet` to store right away, so user has something to select.
+            blocklist = blocklist
+        }
+    }
+
     func fetchServerStatus() async {
         do {
             let (data, _) = try await URLSession.shared.data(for: .init(url: .init(string: "https://status.sr2.uk/index.json")!))