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/Store/Orders.razor

@@ -4,12 +4,10 @@
 <PageTitle>سفارشات من</PageTitle>
 
 <MudContainer MaxWidth="MaxWidth.Large" Class="py-6">
-    <MudText Typo="Typo.h4" Class="mb-3">سفارشات من</MudText>
+    <PageHeader Title="سفارشات من" BackHref="@RouteConstants.Store.Products" />
     @if (_loading)
     {
-        <MudStack AlignItems="AlignItems.Center" Class="py-4">
-            <MudProgressCircular Indeterminate="true" Color="Color.Primary" />
-        </MudStack>
+        <LoadingState />
     }
     else if (_orders.Count == 0)
     {