✨ feat: 初始化 PCB 检测 WPF 应用程序

* 创建 AxiOmron.PcbCheck 项目主框架及解决方案
* 添加 Dashboard 和系统设置页面
* 实现 Modbus TCP PLC、扫码枪、SFTP 查询等核心服务
* 集成 Andon 报警、工作流托管服务与日志配置
* 补充项目文档和 UI 设计规范

src/AxiOmron.PcbCheck/App.xaml.cs

@@ -0,0 +1,130 @@
+using System.IO;
+using System.Text;
+using System.Windows;
+using AxiOmron.PcbCheck.Options;
+using AxiOmron.PcbCheck.Services.Implementations;
+using AxiOmron.PcbCheck.Services.Interfaces;
+using AxiOmron.PcbCheck.ViewModels;
+using AxiOmron.PcbCheck.Views.Pages;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using NLog.Extensions.Logging;
+
+namespace AxiOmron.PcbCheck;
+
+/// <summary>
+/// 表示 WPF 应用入口，负责 Host/DI、配置和日志初始化。
+/// </summary>
+public partial class App : Application
+{
+    private IHost? _host;
+
+    /// <summary>
+    /// 获取当前应用服务容器。
+    /// </summary>
+    public static IServiceProvider Services { get; private set; } = null!;
+
+    /// <summary>
+    /// 应用启动入口。
+    /// </summary>
+    /// <param name="e">启动事件参数。</param>
+    protected override async void OnStartup(StartupEventArgs e)
+    {
+        base.OnStartup(e);
+        try
+        {
+            Console.OutputEncoding = Encoding.UTF8;
+        }
+        catch (IOException)
+        {
+            // WinExe 在没有控制台句柄时忽略
+        }
+
+        try
+        {
+            _host = BuildHost();
+            await _host.StartAsync().ConfigureAwait(true);
+            Services = _host.Services;
+            var mainWindow = Services.GetRequiredService<MainWindow>();
+            MainWindow = mainWindow;
+            mainWindow.Show();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show($"应用启动失败: {ex.Message}", "Axi Omron PCB Check", MessageBoxButton.OK, MessageBoxImage.Error);
+            Shutdown(-1);
+        }
+    }
+
+    /// <summary>
+    /// 应用退出入口。
+    /// </summary>
+    /// <param name="e">退出事件参数。</param>
+    protected override async void OnExit(ExitEventArgs e)
+    {
+        if (_host is not null)
+        {
+            try
+            {
+                await _host.StopAsync(TimeSpan.FromSeconds(2)).ConfigureAwait(false);
+            }
+            finally
+            {
+                _host.Dispose();
+            }
+        }
+
+        base.OnExit(e);
+    }
+
+    /// <summary>
+    /// 构建应用 Host 与依赖注入容器。
+    /// </summary>
+    /// <returns>已构建的 Host 实例。</returns>
+    private static IHost BuildHost()
+    {
+        return Host.CreateDefaultBuilder()
+            .ConfigureAppConfiguration((context, configurationBuilder) =>
+            {
+                configurationBuilder.SetBasePath(AppContext.BaseDirectory);
+                configurationBuilder.AddJsonFile("appConfig.json", optional: true, reloadOnChange: false);
+                configurationBuilder.AddJsonFile($"appConfig.{context.HostingEnvironment.EnvironmentName}.json", optional: true, reloadOnChange: false);
+            })
+            .ConfigureLogging(logging =>
+            {
+                logging.ClearProviders();
+                logging.SetMinimumLevel(LogLevel.Information);
+                logging.AddNLog();
+            })
+            .ConfigureServices((context, services) =>
+            {
+                var appConfig = new AppConfig();
+                context.Configuration.Bind(appConfig);
+
+                services.AddSingleton<IConfiguration>(context.Configuration);
+                services.AddSingleton<IAppConfigService, AppConfigService>();
+                services.AddSingleton(appConfig);
+                services.AddSingleton<IAppStateStore, AppStateStore>();
+                services.AddSingleton(typeof(IAppLogger<>), typeof(AppLogger<>));
+                services.AddSingleton<IDispatcherService, DispatcherService>();
+                services.AddHttpClient(nameof(AndonService));
+
+                services.AddSingleton<IPlcService, ModbusTcpPlcService>();
+                services.AddSingleton<IScannerService, SerialScannerService>();
+                services.AddSingleton<ISftpLookupService, SftpLookupService>();
+                services.AddSingleton<IAndonService, AndonService>();
+                services.AddSingleton<WorkflowHostedService>();
+                services.AddSingleton<IWorkflowControlService>(sp => sp.GetRequiredService<WorkflowHostedService>());
+                services.AddHostedService(sp => sp.GetRequiredService<WorkflowHostedService>());
+
+                services.AddSingleton<MainWindowViewModel>();
+                services.AddSingleton<SystemSettingViewModel>();
+                services.AddSingleton<DashboardPage>();
+                services.AddSingleton<SystemSettingsPage>();
+                services.AddSingleton<MainWindow>();
+            })
+            .Build();
+    }
+}