Fix passkey login tracking, add email opt-out UI guards, and add Quick/Full quote mode toggle

- PasskeyController: set LastLoginDate on passkey sign-in so Company Health
  and audit pages show accurate last-login times (was always showing 'Never')
- Jobs/Index status modal: disable 'Notify customer' email toggle and show
  warning when customer has notifications turned off; CustomerNotifyByEmail
  added to JobListDto + JobProfile mapping + data-customer-notify attribute
- Quotes/Create: disable 'Send quote via email' checkbox with 'Notifications
  off' badge when selected customer has email opt-out; ViewBag.CustomerEmailOptOutIds
  added alongside existing CustomerTaxExemptIds pattern
- Quotes/Create: Quick Quote / Full Quote segmented toggle at top of form;
  hides non-essential fields (dates, notes, tags, oven, discount, photos) in
  Quick mode; selection persisted in localStorage
- InvoicesController Send action: improved error logging and user-facing
  warning when PDF generation or email dispatch fails after status is saved
- item-wizard.js: guard item restoration with try/catch; ensure writeHiddenFields
  always runs on form submit via capture-phase listener
- Help docs and AI knowledge base updated for all new features

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

src/PowderCoating.Web/Controllers/InvoicesController.cs

@@ -893,14 +893,19 @@ public class InvoicesController : Controller
             if (!string.IsNullOrEmpty(invoice.PaymentLinkToken))
                 paymentUrl = $"{Request.Scheme}://{Request.Host}/pay/{invoice.PaymentLinkToken}";
 
+            bool pdfAndNotifSucceeded = false;
             try
             {
                 var pdfBytes = await BuildInvoicePdfAsync(invoice, currentUser!.CompanyId);
                 await _notificationService.NotifyInvoiceSentAsync(invoice, pdfBytes, $"Invoice-{invoice.InvoiceNumber}.pdf", paymentUrl);
+                pdfAndNotifSucceeded = true;
             }
             catch (Exception notifyEx)
             {
-                _logger.LogWarning(notifyEx, "Invoice sent but notification failed for invoice {Id}", id);
+                _logger.LogError(notifyEx,
+                    "Invoice {InvoiceId} ({InvoiceNumber}): PDF generation or email dispatch failed. " +
+                    "Inner: {InnerMessage}. Invoice status was already saved as Sent.",
+                    id, invoice.InvoiceNumber, notifyEx.InnerException?.Message ?? "none");
             }
 
             var notifLog = await _context.NotificationLogs
@@ -911,6 +916,8 @@ public class InvoicesController : Controller
             this.SetNotificationResultToast(notifLog);
 
             TempData["Success"] = $"Invoice {invoice.InvoiceNumber} marked as sent.";
+            if (!pdfAndNotifSucceeded)
+                TempData["Warning"] = "The invoice is marked as sent, but PDF generation or the customer email failed. Check the notification logs or your email configuration.";
             return RedirectToAction(nameof(Details), new { id });
         }
         catch (Exception ex)