Handle unauthorized

DiunaBI.UI.Shared/Handlers/UnauthorizedResponseHandler.cs

@@ -0,0 +1,41 @@
+using Microsoft.AspNetCore.Components;
+using Microsoft.Extensions.DependencyInjection;
+using DiunaBI.UI.Shared.Services;
+
+namespace DiunaBI.UI.Shared.Handlers;
+
+public class UnauthorizedResponseHandler : DelegatingHandler
+{
+    private readonly IServiceProvider _serviceProvider;
+
+    public UnauthorizedResponseHandler(IServiceProvider serviceProvider)
+    {
+        _serviceProvider = serviceProvider;
+    }
+
+    protected override async Task<HttpResponseMessage> SendAsync(
+        HttpRequestMessage request,
+        CancellationToken cancellationToken)
+    {
+        var response = await base.SendAsync(request, cancellationToken);
+
+        // Check if response is 401 Unauthorized
+        if (response.StatusCode == System.Net.HttpStatusCode.Unauthorized)
+        {
+            Console.WriteLine("⚠️ 401 Unauthorized response detected - clearing credentials and redirecting to login");
+
+            // Create a scope to get scoped services
+            using var scope = _serviceProvider.CreateScope();
+            var authService = scope.ServiceProvider.GetRequiredService<AuthService>();
+            var navigationManager = scope.ServiceProvider.GetRequiredService<NavigationManager>();
+
+            // Clear authentication
+            await authService.ClearAuthenticationAsync();
+
+            // Navigate to login page with session expired message
+            navigationManager.NavigateTo("/login?sessionExpired=true", forceLoad: true);
+        }
+
+        return response;
+    }
+}