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/QuotesController.cs

@@ -2642,6 +2642,11 @@ public class QuotesController : Controller
             .Where(c => c.IsTaxExempt)
             .Select(c => c.Id)
             .ToHashSet();
+        // Map used by JS to disable the email checkbox when the customer has notifications turned off
+        ViewBag.CustomerEmailOptOutIds = customers
+            .Where(c => !c.NotifyByEmail)
+            .Select(c => c.Id)
+            .ToHashSet();
         // Stored separately so views can restore the company default when switching away from an exempt customer
         // (ViewBag.CompanyTaxPercent is set by the calling action if it has access to operatingCosts)
         if (ViewBag.CompanyTaxPercent == null && customers.Any())