Initial commit — AsadiTools v1.0

Full ASP.NET Core 10 Razor Pages app for آساد ابزار tool repair shop
in Karaj, Iran (official DeWalt representative).

Features:
- Homepage, Services, DeWalt page, Shop (pagination + images)
- 10 brand SEO pages (/brands/*) with rich Persian content + FAQ schema
- Blog engine with admin management (/blog, /Admin/Blog)
- Cart, Checkout, Contact (OpenStreetMap embed)
- Admin panel: Products CRUD, Orders, Blog, Change Password
- Jalali date formatting, product images, SiteData centralised contact
- Docker + docker-compose with healthcheck
- Gitea CI/CD via .gitea/workflows/ci-cd.yml (NuGet through Nexus mirror)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Services/CartService.cs

@@ -0,0 +1,51 @@
+using AsadiTools.Models;
+using System.Text.Json;
+
+namespace AsadiTools.Services;
+
+public class CartService(IHttpContextAccessor httpContextAccessor)
+{
+    private const string SessionKey = "Cart";
+    private ISession Session => httpContextAccessor.HttpContext!.Session;
+
+    public List<CartItem> GetItems()
+    {
+        var json = Session.GetString(SessionKey);
+        return json is null ? [] : JsonSerializer.Deserialize<List<CartItem>>(json) ?? [];
+    }
+
+    public void AddItem(CartItem item)
+    {
+        var items = GetItems();
+        var existing = items.FirstOrDefault(i => i.ProductId == item.ProductId);
+        if (existing is not null)
+            existing.Qty++;
+        else
+            items.Add(item);
+        Save(items);
+    }
+
+    public void UpdateQty(int productId, int qty)
+    {
+        var items = GetItems();
+        var item = items.FirstOrDefault(i => i.ProductId == productId);
+        if (item is null) return;
+        if (qty <= 0) items.Remove(item);
+        else item.Qty = qty;
+        Save(items);
+    }
+
+    public void RemoveItem(int productId)
+    {
+        var items = GetItems().Where(i => i.ProductId != productId).ToList();
+        Save(items);
+    }
+
+    public void Clear() => Session.Remove(SessionKey);
+
+    public int Count => GetItems().Sum(i => i.Qty);
+    public decimal Total => GetItems().Sum(i => i.Subtotal);
+
+    private void Save(List<CartItem> items) =>
+        Session.SetString(SessionKey, JsonSerializer.Serialize(items));
+}