Hide email controls when no email on file; show SMS hint for quote/job events

- Quotes Create/Edit: hide 'Send via email' checkbox when customer has no
  email; show badge 'send via SMS from details' or 'SMS consent required'
  when customer has a mobile number. JS responds to customer dropdown change.
- Quotes Details: hide 'Send Quote via Email' button and approval email
  checkbox; hide SMS button when no mobile; show consent-required note.
- Jobs Details (Mark Complete modal): hide email checkbox; show
  'SMS notification will be sent' badge or consent-required note.
- Jobs Index (status modal): hide email row when customer has no email.
- Jobs Edit: hide 'Notify customer if status changes' when no email.
- Invoices Details: hide Send/Re-send buttons when no email (vs. disabled).

DTOs: added CustomerEmail + CustomerNotifyByEmail to JobDto/JobListDto;
added CustomerNotifyByEmail/CustomerMobilePhone/CustomerNotifyBySms to
QuoteDto. Mapped in JobProfile and QuotesController customer blocks.

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

src/PowderCoating.Application/DTOs/Job/JobDtos.cs

@@ -52,6 +52,8 @@ public class JobDto
     public bool RequiresCustomerApproval { get; set; }
     public bool IsCustomerApproved { get; set; }
 
+    public string? CustomerEmail { get; set; }
+    public bool CustomerNotifyByEmail { get; set; } = true;
     // Customer SMS opt-in — used for SMS compose modal on job details
     public bool CustomerNotifyBySms { get; set; }
     public string? CustomerMobilePhone { get; set; }
@@ -103,6 +105,7 @@ public class JobListDto
     public string PriorityDisplayName { get; set; } = string.Empty;
     public string PriorityColorClass { get; set; } = "secondary";
 
+    public string? CustomerEmail { get; set; }
     public bool CustomerNotifyByEmail { get; set; } = true;
     public DateTime? ScheduledDate { get; set; }
     public DateTime? DueDate { get; set; }