Use new front-end based on Dashmin template

UI/Pages/Client.cshtml.cs

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+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using MTWireGuard.Application.Repositories;
+using Microsoft.AspNetCore.Authorization;
+using MTWireGuard.Application.Models.Requests;
+using MTWireGuard.Application.Models.Mikrotik;
+using MTWireGuard.Application;
+
+namespace MTWireGuard.Pages
+{
+    [AllowAnonymous]
+    [IgnoreAntiforgeryToken(Order = 1001)]
+    public class ClientModel(IMikrotikRepository api) : PageModel
+    {
+        public async Task<IActionResult> OnGetAsync()
+        {
+            var user = HttpContext.Session.Get<WGPeerViewModel>("user");
+            if (user == null)
+            {
+                return RedirectPermanent("/Login");
+            }
+            return Page();
+        }
+
+        public async Task<IActionResult> OnPostAsync([FromBody] LoginRequest login)
+        {
+            var users = await api.GetUsersAsync();
+            var user = users.Find(x => x.Name.Equals(login.Username, StringComparison.CurrentCultureIgnoreCase));
+            if (user != null)
+            {
+                HttpContext.Session.Set("user", user);
+                return Page();
+            }
+            return Unauthorized();
+        }
+    }
+}