initial

App.xaml.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Linq;
+using System.Threading;
+using System.Windows;
+
+namespace Bedtimer
+{
+    public partial class App : Application
+    {
+        private Mutex? _single;
+        private TrayHost? _tray;
+
+        private void OnStartup(object sender, StartupEventArgs e)
+        {
+            var args = Environment.GetCommandLineArgs();
+
+            // 1) Elevated branches (exit immediately after doing the thing)
+            if (args.Length > 1 && args[1] == "--save-admin")
+            {
+                Config.SaveFromArgs(args);
+                Shutdown();
+                return;
+            }
+
+            // Handle elevated autostart toggle:  Bedtimer.exe --autostart-admin on|off
+            AutoStart.HandleAdminArgs(args); // returns normally when not matching
+
+            // 2) Single-instance guard
+            _single = new Mutex(true, @"Global\Bedtimer_Singleton", out bool isNew);
+            if (!isNew)
+            {
+                Shutdown();
+                return;
+            }
+
+            // 3) Optional bootstrap: enable autostart only if current process is admin
+            //    (Non-admin users won't be prompted on first run; they can toggle from UI later.)
+            if (!AutoStart.IsEnabled() && Config.IsProcessElevated())
+            {
+                // Will set HKLM\...\Run directly since we’re already elevated
+                AutoStart.SetEnabled(true);
+            }
+
+            // 4) Start tray + overlay
+            _tray = new TrayHost();
+            _tray.Init();
+        }
+
+        private void OnExit(object sender, ExitEventArgs e)
+        {
+            _tray?.Dispose();
+            _single?.Dispose();
+        }
+    }
+}