feat: add top-seller product sections to landing page with guest browsing support

- Add two sections to landing page (Index.razor) below the hero:
  - Top 6 best-selling regular products (3-per-row grid)
  - Top 6 best-selling discount store products (3-per-row grid)
  - Each section has a 'More' button linking to /products and /discount-store
- Add GuestActionGate utility service: wraps auth-required actions; shows
  login modal for guests and resumes the original action after successful login
- Register GuestActionGate as scoped service in ConfigureServices
- Add GetTopSellingAsync(count) to ProductService and DiscountProductService
- Add optional sortBy parameter to DiscountProductService.GetProductsAsync
- Hybridize all product pages for guest browsing:
  - Store/Products, Store/ProductDetail: wrap AddToCart with GuestActionGate
  - DiscountStore/Products, DiscountStore/ProductDetail: wrap AddToCart with GuestActionGate
  - Store/Cart, DiscountStore/Cart, Store/CheckoutSummary: soft auth gate on page init
- Fix MembershipPage membership benefit text to be package-agnostic

Co-authored-by: Cursor <cursoragent@cursor.com>

src/FrontOffice.Main/ConfigureServices.cs

@@ -56,6 +56,7 @@ public static class ConfigureServices
         services.AddSingleton<UserAuthInfo>();
         services.AddScoped<AuthService>();
         services.AddScoped<AuthDialogService>();
+        services.AddScoped<GuestActionGate>();
         // Storefront services
         services.AddScoped<CartService>();
         services.AddScoped<ProductService>();

src/FrontOffice.Main/Pages/Club/MembershipPage.razor

@@ -70,7 +70,7 @@
                         <MudIcon Icon="@Icons.Material.Filled.AccountBalanceWallet" Color="Color.Success" Size="Size.Large" />
                         <MudStack Spacing="0">
                             <MudText Typo="Typo.subtitle1">شارژ کیف پول فروشگاه اعتباری</MudText>
-                            <MudText Typo="Typo.caption" Color="Color.Default">شارژ ۵۶ میلیون تومان کیف پول فروشگاه اعتباری</MudText>
+                            <MudText Typo="Typo.caption" Color="Color.Default">شارژ برابر ارزش پکیج فعال در کیف پول فروشگاه اعتباری</MudText>
                         </MudStack>
                     </MudStack>
                     <MudDivider />

src/FrontOffice.Main/Pages/DiscountStore/Cart.razor.cs

@@ -7,9 +7,15 @@ public partial class Cart : IDisposable
 {
     [Inject] private DiscountCartService DiscountCart { get; set; } = default!;
     [Inject] private VATService VAT { get; set; } = default!;
+    [Inject] private AuthDialogService AuthDialogService { get; set; } = default!;
+    [Inject] private AuthService AuthService { get; set; } = default!;
 
     protected override async Task OnInitializedAsync()
     {
+        if (!await AuthService.IsAuthenticatedAsync())
+        {
+            await AuthDialogService.ShowAuthDialogAsync();
+        }
         await DiscountCart.EnsureInitializedAsync();
         DiscountCart.OnChange += StateHasChanged;
     }

src/FrontOffice.Main/Pages/DiscountStore/Checkout.razor.cs

@@ -11,6 +11,8 @@ public partial class Checkout
     [Inject] private DiscountOrderService DiscountOrderService { get; set; } = default!;
     [Inject] private UserAddressContract.UserAddressContractClient UserAddressContract { get; set; } = default!;
     [Inject] private VATService VAT { get; set; } = default!;
+    [Inject] private AuthDialogService AuthDialogService { get; set; } = default!;
+    [Inject] private AuthService AuthService { get; set; } = default!;
 
     private List<CustomerAddressModel> _addresses = new();
     private CustomerAddressModel? _selectedAddress;
@@ -32,6 +34,10 @@ public partial class Checkout
 
     protected override async Task OnInitializedAsync()
     {
+        if (!await AuthService.IsAuthenticatedAsync())
+        {
+            await AuthDialogService.ShowAuthDialogAsync();
+        }
         await VAT.LoadAsync();
         await DiscountCart.EnsureInitializedAsync();
         await LoadAddresses();

src/FrontOffice.Main/Pages/DiscountStore/ProductDetail.razor.cs

@@ -10,6 +10,7 @@ public partial class ProductDetail
     [Inject] private DiscountProductService DiscountProductService { get; set; } = default!;
     [Inject] private DiscountCartService DiscountCartService { get; set; } = default!;
     [Inject] private VATService VAT { get; set; } = default!;
+    [Inject] private GuestActionGate GuestGate { get; set; } = default!;
 
     private DiscountProductDetail? _product;
     private string _selectedImage = string.Empty;
@@ -59,8 +60,14 @@ public partial class ProductDetail
         _addingToCart = true;
         try
         {
-            await DiscountCartService.AddAsync(_product.Id, _quantity);
-            Snackbar.Add($"{_product.Title} به سبد خرید اضافه شد", MudBlazor.Severity.Success);
+            var productId = _product.Id;
+            var qty = _quantity;
+            var title = _product.Title;
+            await GuestGate.RunAsync(async () =>
+            {
+                await DiscountCartService.AddAsync(productId, qty);
+                Snackbar.Add($"{title} به سبد خرید اضافه شد", MudBlazor.Severity.Success);
+            });
         }
         catch
         {

src/FrontOffice.Main/Pages/DiscountStore/Products.razor.cs

@@ -8,6 +8,7 @@ public partial class Products : ComponentBase, IDisposable
 {
     [Inject] private DiscountProductService ProductService { get; set; } = default!;
     [Inject] private DiscountCartService DiscountCart { get; set; } = default!;
+    [Inject] private GuestActionGate GuestGate { get; set; } = default!;
 
     private string _search = string.Empty;
     private long? _selectedCategoryId;
@@ -94,7 +95,7 @@ public partial class Products : ComponentBase, IDisposable
 
     private async Task AddToCart(DiscountProductCard p)
     {
-        await DiscountCart.AddAsync(p.Id);
+        await GuestGate.RunAsync(() => DiscountCart.AddAsync(p.Id));
     }
 
     private void NavigateToProduct(long id)

src/FrontOffice.Main/Pages/Index.razor

@@ -93,6 +93,161 @@
     </section>
 }
 
+@* ═══════════════════════════════════════════════
+   1c. TOP-SELLING REGULAR PRODUCTS
+   ═══════════════════════════════════════════════ *@
+@if (_loadingTopProducts)
+{
+    <section class="section-landing" style="background:var(--mud-palette-background-gray);">
+        <MudContainer MaxWidth="MaxWidth.Large">
+            <MudStack AlignItems="AlignItems.Center" Class="py-4">
+                <MudProgressCircular Color="Color.Primary" Indeterminate="true" Size="Size.Small" />
+            </MudStack>
+        </MudContainer>
+    </section>
+}
+else
+{
+    @if (_topRegularProducts.Any())
+    {
+        <section class="section-landing" style="background:var(--mud-palette-background-gray);">
+            <MudContainer MaxWidth="MaxWidth.Large">
+                <div class="text-center mb-6 fade-in-up">
+                    <MudText Typo="Typo.h3">پرخریدترین محصولات فروشگاه</MudText>
+                    <MudText Typo="Typo.body1" Class="mud-text-secondary mt-2">
+                        محبوب‌ترین محصولات کارا بازار سلامت
+                    </MudText>
+                </div>
+
+                <MudGrid Spacing="2" Justify="Justify.FlexStart">
+                    @foreach (var p in _topRegularProducts)
+                    {
+                        <MudItem xs="6" sm="6" md="4">
+                            <MudCard Class="rounded-lg h-100 d-flex flex-column overflow-hidden landing-product-card"
+                                     Style="cursor:pointer;"
+                                     @onclick="() => NavigateToRegularProduct(p.Id)">
+                                <MudCardContent Class="d-flex flex-column pa-1 h-100">
+                                    <div style="aspect-ratio:1/1;width:100%;background-image:url('@p.ImageUrl');background-size:cover;background-position:center;border-radius:0.5rem;position:relative;">
+                                        @if (p.RemainingCount <= 0)
+                                        {
+                                            <div style="position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center;border-radius:0.5rem;">
+                                                <MudChip T="string" Color="Color.Error" Variant="Variant.Filled" Size="Size.Small">ناموجود</MudChip>
+                                            </div>
+                                        }
+                                        else if (p.RemainingCount <= 5)
+                                        {
+                                            <MudChip T="string" Color="Color.Warning" Variant="Variant.Filled" Size="Size.Small"
+                                                     Style="position:absolute;top:8px;right:8px;">
+                                                فقط @p.RemainingCount عدد
+                                            </MudChip>
+                                        }
+                                    </div>
+                                    <div class="pa-1 flex-grow-1 d-flex flex-column justify-space-between">
+                                        <MudText Typo="Typo.subtitle1" Style="display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;">@p.Title</MudText>
+                                        <MudText Typo="Typo.subtitle2" Color="Color.Primary">@FormatPrice(p.Price)</MudText>
+                                    </div>
+                                </MudCardContent>
+                                <MudCardActions Class="mt-auto pa-2" @onclick:stopPropagation="true">
+                                    <MudButton Variant="Variant.Filled" Color="Color.Primary" FullWidth="true"
+                                               StartIcon="@Icons.Material.Filled.AddShoppingCart"
+                                               Disabled="@(p.RemainingCount <= 0)"
+                                               OnClick="@(() => AddRegularToCart(p))">
+                                        @(p.RemainingCount <= 0 ? "ناموجود" : "افزودن به سبد")
+                                    </MudButton>
+                                </MudCardActions>
+                            </MudCard>
+                        </MudItem>
+                    }
+                </MudGrid>
+
+                <div class="text-center mt-6">
+                    <MudButton Variant="Variant.Outlined" Color="Color.Primary" Class="rounded-pill"
+                               Href="@RouteConstants.Store.Products"
+                               EndIcon="@Icons.Material.Filled.ArrowBack">
+                        مشاهده همه محصولات
+                    </MudButton>
+                </div>
+            </MudContainer>
+        </section>
+    }
+
+    @* ═══════════════════════════════════════════════
+       1d. TOP-SELLING DISCOUNT STORE PRODUCTS
+       ═══════════════════════════════════════════════ *@
+    @if (_topDiscountProducts.Any())
+    {
+        <section class="section-landing">
+            <MudContainer MaxWidth="MaxWidth.Large">
+                <div class="text-center mb-6 fade-in-up">
+                    <MudText Typo="Typo.h3">پرخریدترین محصولات فروشگاه اعتباری</MudText>
+                    <MudText Typo="Typo.body1" Class="mud-text-secondary mt-2">
+                        محصولات ویژه اعضای باشگاه با پرداخت اعتباری
+                    </MudText>
+                </div>
+
+                <MudGrid Spacing="2" Justify="Justify.FlexStart">
+                    @foreach (var p in _topDiscountProducts)
+                    {
+                        <MudItem xs="6" sm="6" md="4">
+                            <MudCard Class="rounded-lg h-100 d-flex flex-column overflow-hidden landing-product-card"
+                                     Style="cursor:pointer;"
+                                     @onclick="() => NavigateToDiscountProduct(p.Id)">
+                                <MudCardContent Class="d-flex flex-column pa-1 h-100">
+                                    <div style="aspect-ratio:1/1;width:100%;background-image:url('@(string.IsNullOrWhiteSpace(p.ThumbnailUrl) ? p.ImageUrl : p.ThumbnailUrl)');background-size:cover;background-position:center;border-radius:0.5rem;position:relative;">
+                                        @if (p.RemainingCount <= 0)
+                                        {
+                                            <div style="position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center;border-radius:0.5rem;">
+                                                <MudChip T="string" Color="Color.Error" Variant="Variant.Filled" Size="Size.Small">ناموجود</MudChip>
+                                            </div>
+                                        }
+                                        else if (p.RemainingCount <= 5)
+                                        {
+                                            <MudChip T="string" Color="Color.Warning" Variant="Variant.Filled" Size="Size.Small"
+                                                     Style="position:absolute;top:8px;right:8px;">
+                                                فقط @p.RemainingCount عدد
+                                            </MudChip>
+                                        }
+                                        @if (p.MaxDiscountPercent > 0)
+                                        {
+                                            <MudChip T="string" Color="Color.Secondary" Variant="Variant.Filled" Size="Size.Small"
+                                                     Style="position:absolute;top:8px;left:8px;">
+                                                @p.MaxDiscountPercent% اعتبار
+                                            </MudChip>
+                                        }
+                                    </div>
+                                    <div class="pa-1 flex-grow-1 d-flex flex-column justify-space-between">
+                                        <MudText Typo="Typo.subtitle1" Style="display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;">@p.Title</MudText>
+                                        <div>
+                                            <MudText Typo="Typo.subtitle2" Color="Color.Primary">@FormatDiscountPrice(p.Price)</MudText>
+                                            <MudText Typo="Typo.overline" Class="mud-text-secondary" Style="font-size:0.6rem;line-height:1;">(+ ارزش افزوده)</MudText>
+                                        </div>
+                                    </div>
+                                </MudCardContent>
+                                <MudCardActions Class="mt-auto pa-2" @onclick:stopPropagation="true">
+                                    <MudButton Variant="Variant.Filled" Color="Color.Secondary" FullWidth="true"
+                                               StartIcon="@Icons.Material.Filled.AddShoppingCart"
+                                               Disabled="@(p.RemainingCount <= 0)"
+                                               OnClick="@(() => AddDiscountToCart(p))">
+                                        @(p.RemainingCount <= 0 ? "ناموجود" : "افزودن به سبد")
+                                    </MudButton>
+                                </MudCardActions>
+                            </MudCard>
+                        </MudItem>
+                    }
+                </MudGrid>
+
+                <div class="text-center mt-6">
+                    <MudButton Variant="Variant.Outlined" Color="Color.Secondary" Class="rounded-pill"
+                               Href="@RouteConstants.DiscountStore.Products"
+                               EndIcon="@Icons.Material.Filled.ArrowBack">
+                        مشاهده همه محصولات اعتباری
+                    </MudButton>
+                </div>
+            </MudContainer>
+        </section>
+    }
+}
+
 @* ═══════════════════════════════════════════════
    2. HOW IT WORKS — 3 numbered steps
    ═══════════════════════════════════════════════ *@

src/FrontOffice.Main/Pages/Index.razor.cs

@@ -10,11 +10,22 @@ public partial class Index : IDisposable
     [Inject] private BlogPostService BlogPostService { get; set; } = default!;
     [Inject] private AuthService AuthService { get; set; } = default!;
     [Inject] private SitePageSettingsService PageSettingsService { get; set; } = default!;
+    [Inject] private ProductService ProductService { get; set; } = default!;
+    [Inject] private DiscountProductService DiscountProductService { get; set; } = default!;
+    [Inject] private CartService Cart { get; set; } = default!;
+    [Inject] private DiscountCartService DiscountCart { get; set; } = default!;
+    [Inject] private GuestActionGate GuestGate { get; set; } = default!;
+    [Inject] private VATService VAT { get; set; } = default!;
 
     // ── CMS page data ──
     private PageSettingsDto? _pageData;
     private LandingSettings? _settings;
 
+    // ── Top-selling product sections ──
+    private List<Product> _topRegularProducts = new();
+    private List<DiscountProductCard> _topDiscountProducts = new();
+    private bool _loadingTopProducts = true;
+
     // ── Latest blog posts (loaded from CMS) ──
     private List<BlogPostCardDto> _latestPosts = new();
 
@@ -51,10 +62,29 @@ public partial class Index : IDisposable
         PopulateFromSettings();
         _dataLoaded = true;
 
+        // Load top-selling products and blog posts in parallel
+        var topRegTask = ProductService.GetTopSellingAsync(6);
+        var topDiscTask = DiscountProductService.GetTopSellingAsync(6);
+        var featuredPostsTask = BlogPostService.GetFeaturedPostsAsync(2);
+
+        try
+        {
+            await Task.WhenAll(topRegTask, topDiscTask, featuredPostsTask);
+            _topRegularProducts = topRegTask.Result.Products;
+            _topDiscountProducts = topDiscTask.Result.Products;
+        }
+        catch
+        {
+            // Fallback: sections remain empty
+        }
+        _loadingTopProducts = false;
+
         // Load latest published blog posts
         try
         {
-            _latestPosts = await BlogPostService.GetFeaturedPostsAsync(2);
+            _latestPosts = featuredPostsTask.IsCompletedSuccessfully
+                ? featuredPostsTask.Result
+                : await BlogPostService.GetFeaturedPostsAsync(2);
 
             if (_latestPosts.Count < 2)
             {
@@ -267,6 +297,21 @@ public partial class Index : IDisposable
         Navigation.NavigateTo($"/blog/{slug}");
     }
 
+    private void NavigateToRegularProduct(long id)
+        => Navigation.NavigateTo(RouteConstants.Store.ProductDetail + id);
+
+    private void NavigateToDiscountProduct(long id)
+        => Navigation.NavigateTo(RouteConstants.DiscountStore.ProductDetail + id);
+
+    private async Task AddRegularToCart(Product p)
+        => await GuestGate.RunAsync(() => Cart.Add(p, 1));
+
+    private async Task AddDiscountToCart(DiscountProductCard p)
+        => await GuestGate.RunAsync(() => DiscountCart.AddAsync(p.Id));
+
+    private string FormatPrice(long price) => $"{VAT.AddVAT(price):N0} تومان";
+    private string FormatDiscountPrice(long price) => $"{price:N0} تومان";
+
     private async void OnStateChanged()
     {
         await InvokeAsync(StateHasChanged);

src/FrontOffice.Main/Pages/Store/Cart.razor.cs

@@ -8,11 +8,17 @@ public partial class Cart : ComponentBase, IDisposable
 {
     [Inject] private CartService CartService { get; set; } = default!;
     [Inject] private VATService VAT { get; set; } = default!;
+    [Inject] private AuthDialogService AuthDialogService { get; set; } = default!;
+    [Inject] private AuthService AuthService { get; set; } = default!;
     // Navigation and Snackbar are available via _Imports.razor
     private CartService CartData => CartService;
 
     protected override async Task OnInitializedAsync()
     {
+        if (!await AuthService.IsAuthenticatedAsync())
+        {
+            await AuthDialogService.ShowAuthDialogAsync();
+        }
         // لود سبد خرید (فقط اگر کاربر لاگین کرده باشد)
         await CartService.EnsureInitializedAsync();
         CartService.OnChange += StateHasChanged;

src/FrontOffice.Main/Pages/Store/CheckoutSummary.razor.cs

@@ -14,6 +14,8 @@ public partial class CheckoutSummary : ComponentBase
     [Inject] private VATService VAT { get; set; } = default!;
     [Inject] private UserAddressContract.UserAddressContractClient UserAddressContract { get; set; } = default!;
     [Inject] private UserOrderContract.UserOrderContractClient UserOrderContract { get; set; } = default!;
+    [Inject] private AuthDialogService AuthDialogService { get; set; } = default!;
+    [Inject] private AuthService AuthService { get; set; } = default!;
     // Snackbar and Navigation are injected via _Imports.razor
 
     private List<CustomerAddressModel> _addresses = new();
@@ -27,6 +29,10 @@ public partial class CheckoutSummary : ComponentBase
 
     protected override async Task OnInitializedAsync()
     {
+        if (!await AuthService.IsAuthenticatedAsync())
+        {
+            await AuthDialogService.ShowAuthDialogAsync();
+        }
         // لود سبد خرید (فقط اگر کاربر لاگین کرده باشد)
         await Cart.EnsureInitializedAsync();
         await LoadAddresses();

src/FrontOffice.Main/Pages/Store/ProductDetail.razor.cs

@@ -12,6 +12,7 @@ public partial class ProductDetail : ComponentBase, IDisposable
     [Inject] private ProductService ProductService { get; set; } = default!;
     [Inject] private CartService Cart { get; set; } = default!;
     [Inject] private VATService VAT { get; set; } = default!;
+    [Inject] private GuestActionGate GuestGate { get; set; } = default!;
 
     [Parameter] public long id { get; set; }
 
@@ -92,14 +93,18 @@ public partial class ProductDetail : ComponentBase, IDisposable
     private async Task AddToCart()
     {
         if (_product is null) return;
-        await Cart.Add(_product, 1);
+        var product = _product;
+        await GuestGate.RunAsync(() => Cart.Add(product, 1));
     }
 
     private async Task RemoveFromCart()
     {
         if (_product is null) return;
-        _qty--;
-        await Cart.UpdateQuantity(CurrentCartItem.ProductId, _qty);
+        await GuestGate.RunAsync(async () =>
+        {
+            _qty--;
+            await Cart.UpdateQuantity(CurrentCartItem!.ProductId, _qty);
+        });
     }
 
     private void IncreaseLocalQty()

src/FrontOffice.Main/Pages/Store/Products.razor.cs

@@ -21,6 +21,7 @@ public partial class Products : ComponentBase, IDisposable
     [Inject] private CategoryService CategoryService { get; set; } = default!;
     [Inject] private CartService Cart { get; set; } = default!;
     [Inject] private VATService VAT { get; set; } = default!;
+    [Inject] private GuestActionGate GuestGate { get; set; } = default!;
 
     private string _query = string.Empty;
     private bool _loading;
@@ -112,7 +113,7 @@ public partial class Products : ComponentBase, IDisposable
 
     private async Task AddToCart(Product p)
     {
-        await Cart.Add(p, 1);
+        await GuestGate.RunAsync(() => Cart.Add(p, 1));
     }
 
     private string FormatPrice(long price) => $"{VAT.AddVAT(price):N0} تومان";

src/FrontOffice.Main/Utilities/DiscountProductService.cs

@@ -80,7 +80,7 @@ public class DiscountProductService
     public async Task<DiscountProductListResult> GetProductsAsync(
         int page = 1, int pageSize = 12,
         string? search = null, long? categoryId = null,
-        bool? inStock = null)
+        bool? inStock = null, string? sortBy = null)
     {
         try
         {
@@ -97,6 +97,8 @@ public class DiscountProductService
                 request.CategoryId = categoryId.Value;
             if (inStock.HasValue)
                 request.InStock = inStock.Value;
+            if (!string.IsNullOrWhiteSpace(sortBy))
+                request.SortBy = sortBy;
 
             var response = await _productClient.GetDiscountProductsAsync(request);
 
@@ -125,6 +127,9 @@ public class DiscountProductService
         }
     }
 
+    public Task<DiscountProductListResult> GetTopSellingAsync(int count = 6)
+        => GetProductsAsync(page: 1, pageSize: count, sortBy: "SaleCount desc");
+
     public async Task<DiscountProductDetail?> GetByIdAsync(long productId)
     {
         try

src/FrontOffice.Main/Utilities/GuestActionGate.cs

@@ -0,0 +1,42 @@
+namespace FrontOffice.Main.Utilities;
+
+/// <summary>
+/// هر action ای که نیاز به لاگین دارد را از طریق این سرویس اجرا کنید.
+/// اگر کاربر لاگین نباشد، مودال ورود نشان داده می‌شود.
+/// پس از ورود موفق، action به صورت خودکار اجرا می‌شود.
+/// </summary>
+public class GuestActionGate
+{
+    private readonly AuthService _authService;
+    private readonly AuthDialogService _authDialogService;
+
+    public GuestActionGate(AuthService authService, AuthDialogService authDialogService)
+    {
+        _authService = authService;
+        _authDialogService = authDialogService;
+    }
+
+    /// <summary>
+    /// اگر کاربر لاگین باشد action را اجرا می‌کند.
+    /// در غیر این صورت مودال لاگین را باز کرده و پس از ورود موفق، action را اجرا می‌کند.
+    /// </summary>
+    /// <returns>true اگر action اجرا شد، false اگر کاربر لاگین نکرد.</returns>
+    public async Task<bool> RunAsync(Func<Task> action)
+    {
+        if (await _authService.IsAuthenticatedAsync())
+        {
+            await action();
+            return true;
+        }
+
+        await _authDialogService.ShowAuthDialogAsync();
+
+        if (await _authService.IsAuthenticatedAsync())
+        {
+            await action();
+            return true;
+        }
+
+        return false;
+    }
+}

src/FrontOffice.Main/Utilities/ProductService.cs

@@ -71,6 +71,9 @@ public class ProductService
         return result.Products;
     }
 
+    public Task<ProductListResult> GetTopSellingAsync(int count = 6)
+        => GetProductsPagedAsync(sortBy: "SaleCount desc", page: 1, pageSize: count);
+
     public async Task<ProductListResult> GetProductsPagedAsync(
         string? query = null, long? categoryId = null, string? sortBy = null,
         int page = 1, int pageSize = 12)