Fix — HTML entity rendering across 60 views

Razor's @() expression auto-encodes &, turning — into — which
rendered as literal text in the browser. Wrapped all such expressions in
@Html.Raw() so the em-dash entity is passed through unescaped.

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

src/PowderCoating.Web/Views/PurchaseOrders/Details.cshtml

@@ -256,7 +256,7 @@
                 <div class="d-flex justify-content-between mb-2">
                     <span class="text-muted">Expected Delivery</span>
                     <span class="@(Model.IsOverdue ? "text-danger fw-semibold" : "")">
-                        @(Model.ExpectedDeliveryDate?.ToString("MM/dd/yyyy") ?? "&mdash;")
+                        @Html.Raw(Model.ExpectedDeliveryDate?.ToString("MM/dd/yyyy") ?? "&mdash;")
                     </span>
                 </div>
                 @if (Model.ReceivedDate.HasValue)

src/PowderCoating.Web/Views/PurchaseOrders/Index.cshtml

@@ -260,7 +260,7 @@
                                     </span>
                                 </td>
                                 <td>@po.OrderDate.ToString("MM/dd/yyyy")</td>
-                                <td>@(po.ExpectedDeliveryDate?.ToString("MM/dd/yyyy") ?? "&mdash;")</td>
+                                <td>@Html.Raw(po.ExpectedDeliveryDate?.ToString("MM/dd/yyyy") ?? "&mdash;")</td>
                                 <td class="text-center">@po.ItemCount</td>
                                 <td class="text-end fw-semibold">$@po.TotalAmount.ToString("N2")</td>
                                 <td class="text-end">