Fix two production billing bugs: invoice missing oven cost, quote stuck in Draft after send

Bug 1 — Invoice total didn't match job total for direct jobs:
- Root cause: all three item-save paths in JobsController passed null for
  ovenCostId, so FinalPrice/ShopSuppliesAmount were stored without oven cost
  while the Details page recalculated live with OvenCostId and showed higher.
- Add OvenBatchCost stored field to Job entity (migration AddJobOvenBatchCost,
  default 0 for existing rows).
- Fix Create, Edit, and UpdateItems to pass job.OvenCostId and save OvenBatchCost.
- Fix InvoicesController.Create GET for direct jobs to use stored OvenBatchCost
  and ShopSuppliesAmount as separate labeled lines instead of recalculating
  shop supplies from scratch (which excluded the oven cost base).

Bug 2 — Quote status stayed Draft after "Send Quote via Email":
- ResendQuote advanced the approval token and sent the email but never
  updated the status. Added Draft → Sent advancement (same guard used by
  the SMS send path) so the status updates on successful email send.

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

src/PowderCoating.Web/Controllers/QuotesController.cs

@@ -3059,6 +3059,18 @@ public class QuotesController : Controller
             quote.ApprovalTokenExpiresAt = DateTime.UtcNow.AddDays(
                 int.TryParse(await _platformSettings.GetAsync(PlatformSettingKeys.QuoteApprovalTokenDays), out var tokenDays) ? tokenDays : 30);
             quote.ApprovalTokenUsedAt = null;
+
+            // Advance from Draft → Sent (mirrors the Create and SendSms paths)
+            var resendCompanyId = _tenantContext.GetCurrentCompanyId() ?? 0;
+            var resendStatuses = await _lookupCache.GetQuoteStatusLookupsAsync(resendCompanyId);
+            var resendSentStatus  = resendStatuses.FirstOrDefault(s => s.StatusCode == AppConstants.StatusCodes.Quote.Sent);
+            var resendDraftStatus = resendStatuses.FirstOrDefault(s => s.StatusCode == AppConstants.StatusCodes.Quote.Draft);
+            if (resendSentStatus != null && quote.QuoteStatusId == (resendDraftStatus?.Id ?? 0))
+            {
+                quote.QuoteStatusId = resendSentStatus.Id;
+                quote.SentDate ??= DateTime.UtcNow;
+            }
+
             await _unitOfWork.Quotes.UpdateAsync(quote);
             await _unitOfWork.CompleteAsync();