Added order item delete functionality

Controllers/OrderController.cs

@@ -128,6 +128,24 @@ public class OrderController : Controller
         return RedirectToAction("Join", new { code = order.OrderCode });
     }
 
+    [HttpPost]
+    public async Task<IActionResult> DeleteItem(int orderItemId)
+    {
+        var orderItem = await _context.OrderItems
+            .Include(oi => oi.Order)
+            .FirstOrDefaultAsync(oi => oi.Id == orderItemId);
+        if (orderItem == null)
+            return NotFound("Order item not found");
+
+        if (orderItem.Order?.CreatorName != User.Identity?.Name && orderItem.ParticipantEmail != User.Identity?.Name)
+            return Forbid("Only the order creator or the participant who added the item can delete it");
+
+        _context.OrderItems.Remove(orderItem);
+        await _context.SaveChangesAsync();
+
+        return RedirectToAction("Details", new { code = orderItem.Order?.OrderCode });
+    }
+
     // GET: Order/Details/{code}
     public async Task<IActionResult> Details(string code)
     {