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/DTOs/Invoice/InvoiceDtos.cs

@@ -32,7 +32,9 @@ public class InvoiceDto
     public string CustomerName { get; set; } = string.Empty;
     public string? CustomerEmail { get; set; }
     public string? CustomerPhone { get; set; }
+    public string? CustomerMobilePhone { get; set; }
     public bool CustomerNotifyByEmail { get; set; }
+    public bool CustomerNotifyBySms { get; set; }
     public string? PreparedById { get; set; }
     public string? PreparedByName { get; set; }
     public InvoiceStatus Status { get; set; }

src/PowderCoating.Application/DTOs/Kiosk/KioskDtos.cs

@@ -0,0 +1,87 @@
+using System.ComponentModel.DataAnnotations;
+using PowderCoating.Core.Enums;
+
+namespace PowderCoating.Application.DTOs.Kiosk;
+
+// ── Staff-facing ──────────────────────────────────────────────────────────────
+
+/// <summary>Input for sending a remote intake link to a customer by email.</summary>
+public class SendRemoteLinkDto
+{
+    [Required, EmailAddress]
+    public string Email { get; set; } = string.Empty;
+
+    /// <summary>Optional — used to personalise the email greeting.</summary>
+    public string? CustomerName { get; set; }
+}
+
+// ── Customer-facing step DTOs ─────────────────────────────────────────────────
+
+/// <summary>Step 1 — Contact information submitted by the customer.</summary>
+public class SubmitKioskContactDto
+{
+    [Required, MaxLength(100)]
+    public string FirstName { get; set; } = string.Empty;
+
+    [Required, MaxLength(100)]
+    public string LastName { get; set; } = string.Empty;
+
+    [Required, Phone]
+    public string Phone { get; set; } = string.Empty;
+
+    [Required, EmailAddress]
+    public string Email { get; set; } = string.Empty;
+
+    public bool IsReturningCustomer { get; set; }
+}
+
+/// <summary>Step 2 — Job description submitted by the customer.</summary>
+public class SubmitKioskJobDto
+{
+    [Required, MaxLength(2000)]
+    public string JobDescription { get; set; } = string.Empty;
+
+    public string? HowDidYouHearAboutUs { get; set; }
+}
+
+/// <summary>Step 3 — Terms agreement (+ optional drawn signature for in-person sessions).</summary>
+public class SubmitKioskTermsDto
+{
+    [Required]
+    [Range(typeof(bool), "true", "true", ErrorMessage = "You must agree to the terms to continue.")]
+    public bool AgreedToTerms { get; set; }
+
+    public bool SmsOptIn { get; set; }
+
+    /// <summary>Base-64 PNG from signature_pad; required for InPerson sessions, null for Remote.</summary>
+    public string? SignatureDataBase64 { get; set; }
+}
+
+// ── Staff review list ─────────────────────────────────────────────────────────
+
+/// <summary>One row in the Kiosk Intakes staff review list.</summary>
+public class KioskSessionListDto
+{
+    public int              Id                 { get; set; }
+    public Guid             SessionToken       { get; set; }
+    public KioskSessionType SessionType        { get; set; }
+    public KioskSessionStatus Status           { get; set; }
+    public string           CustomerFirstName  { get; set; } = string.Empty;
+    public string           CustomerLastName   { get; set; } = string.Empty;
+    public string           CustomerEmail      { get; set; } = string.Empty;
+    public string           CustomerPhone      { get; set; } = string.Empty;
+    public string           JobDescription     { get; set; } = string.Empty;
+    public bool             SmsOptIn           { get; set; }
+    public DateTime?        SubmittedAt        { get; set; }
+    public DateTime         ExpiresAt          { get; set; }
+    public int?             LinkedCustomerId   { get; set; }
+    public int?             LinkedJobId        { get; set; }
+    public string?          RemoteLinkEmail    { get; set; }
+
+    public string CustomerFullName => $"{CustomerFirstName} {CustomerLastName}".Trim();
+    public string JobDescriptionSnippet =>
+        JobDescription.Length > 80 ? JobDescription[..80] + "…" : JobDescription;
+    public bool IsConverted => LinkedJobId.HasValue;
+    public bool IsExpired   => Status == KioskSessionStatus.Expired ||
+                               (Status == KioskSessionStatus.Active && DateTime.UtcNow > ExpiresAt);
+}

src/PowderCoating.Application/Interfaces/INotificationService.cs

@@ -58,7 +58,7 @@ public interface INotificationService
     /// Notify customer when an invoice has been sent.
     /// Optionally includes an online payment link in the email body.
     /// </summary>
-    Task NotifyInvoiceSentAsync(Invoice invoice, byte[]? pdfAttachment = null, string? pdfFilename = null, string? paymentUrl = null, string? overrideEmail = null);
+    Task NotifyInvoiceSentAsync(Invoice invoice, byte[]? pdfAttachment = null, string? pdfFilename = null, string? paymentUrl = null, string? overrideEmail = null, bool sendSms = false, string? viewUrl = null);
 
     /// <summary>
     /// Notify customer (internal) when a payment has been recorded on an invoice.

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))