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/PaymentCallback.razor

@@ -3,6 +3,7 @@
 @using Blazored.LocalStorage
 @using CMSMicroservice.Protobuf.Protos.Package
 @using CMSMicroservice.Protobuf.Protos.User
+@inject IJSRuntime JS
 
 
 <PageTitle>نتیجه پرداخت | کارا بازار سلامت</PageTitle>
@@ -37,7 +38,7 @@
             </MudText>
             
             <MudButton Color="Color.Primary" Variant="Variant.Filled" Class="mt-6"
-                       Href="/profile">
+                       OnClick="GoBack">
                 بازگشت به پروفایل
             </MudButton>
         }
@@ -48,7 +49,7 @@
             <MudText Typo="Typo.body1" Class="mt-2">@_message</MudText>
             
             <MudButton Color="Color.Primary" Variant="Variant.Filled" Class="mt-6"
-                       Href="/profile">
+                       OnClick="GoBack">
                 بازگشت به پروفایل
             </MudButton>
             
@@ -173,4 +174,6 @@
     }
 
     private static string FormatPrice(long price) => string.Format("{0:N0} تومان", price);
+
+    private async Task GoBack() => await JS.InvokeVoidAsync("history.back");
 }