Initial commit: base slice (auth, roles, users, admin) scaffold

Backend: .NET 10 Clean Architecture + LiteCqrs.Net + EF Core/PostgreSQL +
Identity/JWT. Frontend: React 19 + Vite + TanStack Query/Router + Tailwind v4
with a retro CRT theme. Docker/compose deployment mirroring PnvPanel's
conventions, scoped down to the current base feature set.

backend/src/TeleWave.Application/DependencyInjection.cs

@@ -0,0 +1,43 @@
+using System.Reflection;
+using FluentValidation;
+using LiteCqrs.Behaviors;
+using LiteCqrs.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection;
+using TeleWave.Application.Common.Behaviors;
+
+namespace TeleWave.Application;
+
+public static class DependencyInjection
+{
+    public static IServiceCollection AddApplication(this IServiceCollection services)
+    {
+        var assembly = typeof(DependencyInjection).Assembly;
+
+        services.AddLiteCqrs(cqrs =>
+        {
+            cqrs.RegisterServicesFromAssembly(assembly);
+            cqrs.Lifetime = ServiceLifetime.Scoped;
+
+            // Порядок важен: Logging (внешний) -> Validation -> UnitOfWork (ближе всего к хендлеру).
+            cqrs.AddOpenBehavior(typeof(LoggingBehavior<,>));
+            cqrs.AddOpenBehavior(typeof(ValidationBehavior<,>));
+            cqrs.AddOpenBehavior(typeof(UnitOfWorkBehavior<,>));
+        });
+
+        RegisterClosedGeneric(services, assembly, typeof(IValidator<>));
+
+        return services;
+    }
+
+    private static void RegisterClosedGeneric(IServiceCollection services, Assembly assembly, Type openInterface)
+    {
+        var implementations = assembly.GetTypes()
+            .Where(t => t is { IsClass: true, IsAbstract: false })
+            .SelectMany(t => t.GetInterfaces()
+                .Where(i => i.IsGenericType && i.GetGenericTypeDefinition() == openInterface)
+                .Select(i => (Service: i, Implementation: t)));
+
+        foreach (var (service, implementation) in implementations)
+            services.AddScoped(service, implementation);
+    }
+}