Use new front-end based on Dashmin template

UI/Middlewares/ErrorHandlingMiddleware.cs

@@ -0,0 +1,51 @@
+using Microsoft.AspNetCore.Mvc;
+using MTWireGuard.Application;
+using Newtonsoft.Json;
+
+namespace MTWireGuard.Middlewares
+{
+    public class ErrorHandlingMiddleware(RequestDelegate next)
+    {
+        public async Task Invoke(HttpContext context)
+        {
+            try
+            {
+                await next(context);
+            }
+            catch (Exception ex)
+            {
+                await HandleExceptionAsync(context, ex);
+            }
+        }
+
+        private static Task HandleExceptionAsync(HttpContext context, Exception exception)
+        {
+            string exceptionType = exception.GetType().Name,
+                message = exception.Message,
+                stackTrace = exception.StackTrace,
+                details = JsonConvert.SerializeObject(exception)!;
+
+            var viewResult = new ViewResult
+            {
+                ViewName = "Error",
+                StatusCode = 500
+            };
+            viewResult.ViewData["Title"] = message;
+            viewResult.ViewData["Message"] = stackTrace;
+            viewResult.ViewData["Details"] = details;
+
+            var html = viewResult.ToHtml(context);
+
+            return context.Response.WriteAsync(html);
+        }
+    }
+
+
+    public static class ExceptionHandlerMiddlewareExtensions
+    {
+        public static IApplicationBuilder UseExceptionHandling(this IApplicationBuilder builder)
+        {
+            return builder.UseMiddleware<ErrorHandlingMiddleware>();
+        }
+    }
+}