Fix inventory label duplicate color/finish display

- Suppress ColorName line if it matches the item Name (powders use
  color name as their item name, causing it to show twice)
- Suppress Finish if already contained in the item Name
- Always show Manufacturer regardless of whether it is populated

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

src/PowderCoating.Web/Views/Inventory/Label.cshtml

@@ -148,21 +148,18 @@
 
         <div class="label-sku">SKU: @Model.SKU</div>
 
-        @if (!string.IsNullOrEmpty(Model.ColorName))
+        @if (!string.IsNullOrEmpty(Model.ColorName) && !string.Equals(Model.ColorName, Model.Name, StringComparison.OrdinalIgnoreCase))
         {
             <div class="label-color">
                 @Model.ColorName
-                @if (!string.IsNullOrEmpty(Model.Finish))
+                @if (!string.IsNullOrEmpty(Model.Finish) && Model.Name.IndexOf(Model.Finish, StringComparison.OrdinalIgnoreCase) < 0)
                 {
                     <span> &mdash; @Model.Finish</span>
                 }
             </div>
         }
 
-        @if (!string.IsNullOrEmpty(Model.Manufacturer))
-        {
-            <div class="label-sku" style="color:#777">@Model.Manufacturer</div>
-        }
+        <div class="label-sku" style="color:#777">@Model.Manufacturer</div>
 
         @if (!string.IsNullOrEmpty(Model.Location))
         {