[lcenavigationview-adoption] Center Orders empty-state text, not left

Previous fix's VStack-level .frame(maxWidth: .infinity, alignment:
.leading) fixed the width but over-applied .leading to the empty
text too. Give it its own centered frame instead, matching the
isLoading/errorMessage branches right above it.

PediFoods/Views/Main/OrdersView.swift

@@ -44,6 +44,7 @@ struct OrdersView: View {
                     Text("Nenhum pedido encontrado.")
                         .font(AppTypography.body)
                         .foregroundStyle(AppColors.textMuted)
+                        .frame(maxWidth: .infinity)
                         .padding(.top, 24)
                 } else {
                     ForEach(orders) { order in