feat: full FrontOffice updates - discount store, blog, payment gateway, UI improvements

- Discount store pages (products, cart, orders, order detail)
- Blog pages and services
- Payment gateway callback page
- AppImage component, EmptyState, LoadingState, PageHeader
- DiscountCartService, DiscountOrderService, DiscountProductService
- BlogCategoryService, BlogPostService, SitePageService, ImageCacheService
- PhoneVerifyForm component
- Profile Hub page
- UI/UX improvements across all pages
- landing.js for homepage
- Config and routing updates

src/FrontOffice.Main/Pages/Profile/WithdrawalRequests.razor

@@ -4,10 +4,7 @@
 
 <MudContainer MaxWidth="MaxWidth.Large" Class="py-6">
     <MudStack Spacing="3">
-        <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center">
-            <MudText Typo="Typo.h5">درخواست‌های برداشت</MudText>
-            <MudButton Variant="Variant.Text" StartIcon="@Icons.Material.Filled.ArrowBack" Href="@RouteConstants.Profile.Wallet">بازگشت به کیف پول</MudButton>
-        </MudStack>
+        <PageHeader Title="درخواست‌های برداشت" BackHref="@RouteConstants.Profile.Wallet" />
 
         <!-- فرم درخواست برداشت جدید -->
         <MudPaper Elevation="2" Class="pa-4 rounded-lg">
@@ -100,7 +97,7 @@
             
             @if (_isLoading)
             {
-                <MudProgressLinear Color="Color.Primary" Indeterminate="true" />
+                <LoadingState />
             }
             else if (!_withdrawals.Any())
             {