Fix CampusNAS recovery after VPN loss

Sources/CampusNASMonitor/AppDelegate.swift

@@ -12,6 +12,7 @@ final class AppDelegate: NSObject, NSApplicationDelegate, NSWindowDelegate {
     private var hosting: NSHostingController<ContentView>?
     private var settingsWindow: NSWindow?
     private var keyMonitor: Any?
+    private var wakeObserver: NSObjectProtocol?
     private var cancellables = Set<AnyCancellable>()
 
     func applicationDidFinishLaunching(_ notification: Notification) {
@@ -39,6 +40,7 @@ final class AppDelegate: NSObject, NSApplicationDelegate, NSWindowDelegate {
             .store(in: &cancellables)
 
         installKeyMonitor()
+        observeWake()
         model.start()
         render()
 
@@ -51,6 +53,17 @@ final class AppDelegate: NSObject, NSApplicationDelegate, NSWindowDelegate {
         }
     }
 
+    private func observeWake() {
+        wakeObserver = NSWorkspace.shared.notificationCenter.addObserver(
+            forName: NSWorkspace.didWakeNotification, object: nil, queue: .main
+        ) { [weak self] _ in
+            // NetworkExtension and Wi-Fi routes settle just after didWake.
+            DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
+                Task { @MainActor in self?.model.wake() }
+            }
+        }
+    }
+
     /// Launching the app again while it is already running (Finder, Spotlight,
     /// `open`) brings the window up instead of doing nothing, which is what a
     /// second launch is normally asking for.