kev/Drawer/AI/ServiceCollectionExtensions.cs

using AI.AgentIntegration;
using AI.Interface;
using AI.Service;
using Microsoft.Extensions.DependencyInjection;
using AI.ViewModels;

namespace AI
{
    public static class ServiceCollectionExtensions
    {
        public static void AddCommonServices(this IServiceCollection collection)
        {
            // 注册会话管理器
            collection.AddSingleton<ChatSessionManager>();

            // 注册聊天后端
            collection.AddSingleton<IChatBackend, KernelService>();

            // 注册主窗口 ViewModel
            collection.AddSingleton<MainWindowViewModel>();

            // 注册表单注册表与表单通知器
            collection.AddSingleton<IAppController>(_ =>
                AppControllerHolder.Instance ?? new NoOpAppController());
            collection.AddSingleton<IFormRegistry, FormRegistry>();
            collection.AddSingleton<IFormRequestNotifier, FormRequestNotifier>();
        }
    }
}