Initial commit: NFC Actions Windows tray application

Implement PC/SC-based NFC card reader monitoring application with WPF UI. Features include:
- System tray integration with single-click to open main window
- Dynamic reader detection and management with enable/disable per reader
- NDEF payload extraction supporting Type 2 and Type 4 tags
- Auto-detection of block sizes (4-byte vs 16-byte) for different reader types
- Configurable actions: copy to clipboard, launch URLs, keyboard input simulation
- URI record type detection - only launches browser for actual URI records
- Real-time activity logging with color-coded levels (Debug, Info, Warning, Error)
- File-based debug logging for troubleshooting
- Settings persistence between sessions
- Dangerous Things branding with custom icons and clickable logo

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

NfcActions/App.xaml.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Drawing;
+using System.Windows;
+using System.Windows.Forms;
+using NfcActions.Services;
+using NfcActions.ViewModels;
+using Application = System.Windows.Application;
+
+namespace NfcActions;
+
+/// <summary>
+/// Interaction logic for App.xaml
+/// </summary>
+public partial class App : Application
+{
+    private NotifyIcon? _notifyIcon;
+    private Icon? _customIcon;
+    private MainWindow? _mainWindow;
+    private CardReaderService? _cardReaderService;
+    private SettingsService? _settingsService;
+    private ActionService? _actionService;
+    private LogService? _logService;
+    private MainViewModel? _viewModel;
+
+    private void Application_Startup(object sender, StartupEventArgs e)
+    {
+        // Initialize services
+        _logService = new LogService();
+        _cardReaderService = new CardReaderService(_logService);
+        _settingsService = new SettingsService();
+        _actionService = new ActionService();
+
+        // Initialize ViewModel
+        _viewModel = new MainViewModel(_cardReaderService, _settingsService, _actionService, _logService);
+
+        // Create main window but don't show it yet
+        _mainWindow = new MainWindow(_viewModel);
+
+        // Load custom icon
+        try
+        {
+            var iconPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Resources", "icon.ico");
+            if (System.IO.File.Exists(iconPath))
+            {
+                _customIcon = new Icon(iconPath);
+            }
+        }
+        catch
+        {
+            // Fall back to default if custom icon can't be loaded
+        }
+
+        // Create system tray icon
+        _notifyIcon = new NotifyIcon
+        {
+            Icon = _customIcon ?? SystemIcons.Application,
+            Visible = true,
+            Text = "NFC Actions"
+        };
+
+        // Set up context menu
+        var contextMenu = new ContextMenuStrip();
+        contextMenu.Items.Add("Open", null, (s, args) => ShowMainWindow());
+        contextMenu.Items.Add(new ToolStripSeparator());
+        contextMenu.Items.Add("Exit", null, (s, args) => ExitApplication());
+
+        _notifyIcon.ContextMenuStrip = contextMenu;
+        _notifyIcon.MouseClick += (s, args) =>
+        {
+            if (args.Button == MouseButtons.Left)
+            {
+                ShowMainWindow();
+            }
+        };
+
+        // Start the card reader service
+        _cardReaderService.Start();
+
+        // Show a notification that the app is running
+        _notifyIcon.ShowBalloonTip(
+            3000,
+            "NFC Actions",
+            "NFC Actions is now monitoring for card events. Right-click the tray icon to configure.",
+            ToolTipIcon.Info);
+    }
+
+    private void ShowMainWindow()
+    {
+        if (_mainWindow != null)
+        {
+            _mainWindow.Show();
+            _mainWindow.WindowState = WindowState.Normal;
+            _mainWindow.Activate();
+        }
+    }
+
+    private void ExitApplication()
+    {
+        _notifyIcon?.Dispose();
+        _customIcon?.Dispose();
+        _cardReaderService?.Dispose();
+        Shutdown();
+    }
+
+    private void Application_Exit(object sender, ExitEventArgs e)
+    {
+        _notifyIcon?.Dispose();
+        _customIcon?.Dispose();
+        _cardReaderService?.Dispose();
+    }
+}