Add pricing breakdown and powder pre-fill to Job Details; surface voided invoice history

- Job Details: collapsible internal pricing breakdown card mirrors quote details breakdown
  (items subtotal, shop supplies, discount, rush fee, tax, total)
- Job Details: voided invoice history section shows previous invoices instead of hiding them
- Complete Job modal: pre-fills powder usage from QR-scanned / manually logged entries so
  staff don't double-log; consumes pre-logged credit per InventoryItemId before deducting net delta
- JobProfile: map ShopSuppliesAmount, ShopSuppliesPercent, IsRushJob, DiscountType/Value/Reason
  so the pricing breakdown has the data it needs

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

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

@@ -1,6 +1,9 @@
 @model PowderCoating.Application.DTOs.Job.JobDto
 @{
     var emailDefault = ViewBag.EmailDefaultOnComplete == true;
+    var preLoggedPowder = ViewBag.PreLoggedPowder as Dictionary<int, decimal> ?? new Dictionary<int, decimal>();
+    // Track remaining credit per InventoryItemId as we allocate it across coat rows
+    var remainingCredit = preLoggedPowder.ToDictionary(kv => kv.Key, kv => kv.Value);
 }
 <div class="modal fade" id="completeJobModal" tabindex="-1">
     <div class="modal-dialog modal-dialog-centered modal-lg">
@@ -76,12 +79,27 @@
                                                             <small class="text-muted">@((coat.PowderToOrder ?? 0).ToString("0.##"))</small>
                                                         </td>
                                                         <td>
+                                                            @{
+                                                                decimal preFilledLbs = 0m;
+                                                                if (coat.InventoryItemId.HasValue && remainingCredit.TryGetValue(coat.InventoryItemId.Value, out var availCredit) && availCredit > 0)
+                                                                {
+                                                                    preFilledLbs = availCredit;
+                                                                    remainingCredit[coat.InventoryItemId.Value] = 0m;
+                                                                }
+                                                            }
                                                             <input type="hidden" name="CoatUsages[@coatIndex].JobItemCoatId" value="@coat.Id" />
                                                             <input type="number"
                                                                    class="form-control form-control-sm"
                                                                    name="CoatUsages[@coatIndex].ActualPowderUsedLbs"
                                                                    step="0.01" min="0" placeholder="0.00"
+                                                                   value="@(preFilledLbs > 0 ? preFilledLbs.ToString("0.##") : "")"
                                                                    style="max-width: 120px;">
+                                                            @if (preFilledLbs > 0)
+                                                            {
+                                                                <small class="text-success d-block mt-1">
+                                                                    <i class="bi bi-check-circle me-1"></i>Already logged — inventory adjusted
+                                                                </small>
+                                                            }
                                                         </td>
                                                     </tr>
                                                     coatIndex++;
@@ -104,7 +122,7 @@
                             </div>
                             <div class="alert alert-info mb-0">
                                 <i class="bi bi-info-circle me-2"></i>
-                                <small>Enter the actual amount of powder used for each coat. Leave blank if not tracked.</small>
+                                <small>Pre-filled values were already logged via scan — inventory is already adjusted for those. You can edit the amount; only the difference will be applied to inventory.</small>
                             </div>
                         </div>
                     }