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src/FrontOffice.Main/App.razor.cs

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+using System;
+using System.Threading.Tasks;
+using Blazored.LocalStorage;
+using FrontOffice.Main.Utilities;
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Routing;
+
+namespace FrontOffice.Main;
+
+public partial class App
+{
+    private const string TokenStorageKey = "auth:token";
+
+    [Inject] private ILocalStorageService LocalStorage { get; set; } = default!;
+
+    private async Task HandleNavigationAsync(NavigationContext context)
+    {
+        var relativePath = Navigation.ToBaseRelativePath(context.Path);
+        if (IsAuthPath(relativePath))
+        {
+            return;
+        }
+
+        var token = await LocalStorage.GetItemAsync<string>(TokenStorageKey);
+        if (string.IsNullOrWhiteSpace(token))
+        {
+            var normalized = NormalizePath(relativePath);
+            var redirectQuery = string.IsNullOrEmpty(normalized) || normalized == "/"
+                ? string.Empty
+                : $"?redirect={Uri.EscapeDataString(normalized)}";
+
+            Navigation.NavigateTo(RouteConstants.Auth.Phone + redirectQuery, forceLoad: true);
+        }
+    }
+
+    private static bool IsAuthPath(string? path)
+    {
+        if (string.IsNullOrWhiteSpace(path))
+        {
+            return false;
+        }
+
+        path = path.TrimStart('/');
+        return path.StartsWith("auth", StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static string NormalizePath(string? path)
+    {
+        if (string.IsNullOrWhiteSpace(path))
+        {
+            return string.Empty;
+        }
+
+        var normalized = path.StartsWith('/') ? path : "/" + path;
+        return normalized;
+    }
+}