Promote job powders to top of Log Material dropdown

Powders already assigned to this job's coats appear under a 'This Job'
section header, then a divider, then 'All Inventory' — so the most
relevant choices are always one click away.

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

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

@@ -3162,10 +3162,11 @@
 <script>
 (function () {
     const inventoryItems = @Html.Raw(ViewBag.InventoryItemsForModal ?? "[]");
+    const jobPowderIds  = @Html.Raw(ViewBag.JobPowderIds ?? "[]");
     const jobId = @Model.Id;
     const logUrl = '@Url.Action("LogMaterial", "Jobs")';
     const token = document.querySelector('input[name="__RequestVerificationToken"]')?.value ?? '';
-    window.__logMaterial = { inventoryItems, jobId, logUrl, token };
+    window.__logMaterial = { inventoryItems, jobPowderIds, jobId, logUrl, token };
 })();
 </script>