Feature: Complete order management for pending orders

- Added delete order functionality with identity verification
- OrderDetailsMenu now shows conditional buttons based on order/payment state
- Retry payment if no payments exist
- View payment details if payment pending
- Delete order option for all pending orders
- Full client SDK implementation for CancelOrderAsync

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

LittleShop.Client/Services/IOrderService.cs

@@ -11,4 +11,5 @@ public interface IOrderService
     Task<ApiResponse<Order>> GetOrderByCustomerIdAsync(Guid customerId, Guid orderId);
     Task<ApiResponse<CryptoPayment>> CreatePaymentAsync(Guid orderId, int currency);
     Task<ApiResponse<List<CryptoPayment>>> GetOrderPaymentsAsync(Guid orderId);
+    Task<ApiResponse<bool>> CancelOrderAsync(Guid orderId, string identityReference);
 }

LittleShop.Client/Services/OrderService.cs

@@ -185,8 +185,31 @@ public class OrderService : IOrderService
         {
             _logger.LogError(ex, "Failed to get payments for order {OrderId}", orderId);
             return ApiResponse<List<CryptoPayment>>.Failure(
-                ex.Message, 
+                ex.Message,
                 System.Net.HttpStatusCode.InternalServerError);
         }
     }
+
+    public async Task<ApiResponse<bool>> CancelOrderAsync(Guid orderId, string identityReference)
+    {
+        try
+        {
+            var response = await _httpClient.PostAsJsonAsync(
+                $"api/orders/{orderId}/cancel",
+                new { IdentityReference = identityReference }
+            );
+
+            if (response.IsSuccessStatusCode)
+            {
+                return ApiResponse<bool>.Success(true, response.StatusCode);
+            }
+
+            return ApiResponse<bool>.Failure("Failed to cancel order", response.StatusCode);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error cancelling order {OrderId}", orderId);
+            return ApiResponse<bool>.Failure($"Error: {ex.Message}", System.Net.HttpStatusCode.InternalServerError);
+        }
+    }
 }