Add invoice SMS notifications and customer intake kiosk

Invoice SMS:
- Send Invoice modal now prompts Email/SMS/Both based on customer contact data
- New /invoice/{token} customer-facing view page with full line items and pay button
- PublicViewToken (permanent) added to Invoice; separate from expiring PaymentLinkToken
- InvoiceSent SMS default template added; customizable via Notification Templates settings
- {{viewUrl}} placeholder documented in template editor

Customer Intake Kiosk:
- Tablet kiosk flow: Contact → Job → Terms/Signature → Confirmation
- Remote link mode for off-site customers (lighter form, no signature)
- KioskHub (AllowAnonymous SignalR) for staff-to-tablet push without login
- Staff activates tablet via cookie; sends remote link manually
- Submitted sessions create Customer + Job automatically; fires in-app notification

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

src/PowderCoating.Application/Mappings/InvoiceProfile.cs

@@ -28,7 +28,9 @@ public class InvoiceProfile : Profile
                 ? (s.Customer.BillingEmail ?? s.Customer.Email)
                 : null))
             .ForMember(d => d.CustomerPhone, o => o.MapFrom(s => s.Customer != null ? s.Customer.Phone : null))
+            .ForMember(d => d.CustomerMobilePhone, o => o.MapFrom(s => s.Customer != null ? s.Customer.MobilePhone : null))
             .ForMember(d => d.CustomerNotifyByEmail, o => o.MapFrom(s => s.Customer == null || s.Customer.NotifyByEmail))
+            .ForMember(d => d.CustomerNotifyBySms, o => o.MapFrom(s => s.Customer != null && s.Customer.NotifyBySms))
             .ForMember(d => d.PreparedByName, o => o.MapFrom(s => s.PreparedBy != null
                 ? $"{s.PreparedBy.FirstName} {s.PreparedBy.LastName}".Trim()
                 : null))