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/Blog/Post.razor.cs

@@ -0,0 +1,51 @@
+using FrontOffice.Main.Utilities;
+using Microsoft.AspNetCore.Components;
+using Microsoft.JSInterop;
+
+namespace FrontOffice.Main.Pages.Blog;
+
+public partial class Post
+{
+    [Inject] private IJSRuntime JS { get; set; } = default!;
+    [Parameter] public string Slug { get; set; } = string.Empty;
+
+    [Inject] private BlogPostService BlogPostService { get; set; } = default!;
+
+    private BlogPostDetailDto? _post;
+    private bool _isLoading = true;
+
+    protected override async Task OnParametersSetAsync()
+    {
+        if (string.IsNullOrWhiteSpace(Slug)) return;
+
+        _isLoading = true;
+        StateHasChanged();
+
+        try
+        {
+            _post = await BlogPostService.GetBySlugAsync(Slug);
+
+            // Fire-and-forget: increment view count
+            if (_post != null)
+            {
+                _ = BlogPostService.IncrementViewCountAsync(_post.Id);
+            }
+        }
+        catch
+        {
+            _post = null;
+        }
+        finally
+        {
+            _isLoading = false;
+            StateHasChanged();
+        }
+    }
+
+    private void NavigateToCategoryFilter(long categoryId)
+    {
+        Navigation.NavigateTo($"/blog?category={categoryId}");
+    }
+
+    private async Task GoBack() => await JS.InvokeVoidAsync("history.back");
+}