Add Quote Sent SMS template and fix consent confirmation wording

Adds a customizable QuoteSent SMS template to seed data and
DefaultTemplates so companies can edit the quote approval message
from Notification Templates. Wires NotifyQuoteSentSmsAsync to use
the template system instead of a hardcoded string. Updates
SmsConsentConfirmation wording to mention quote approvals alongside
job updates. Help docs and AI knowledge base updated to match.

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

src/PowderCoating.Infrastructure/Data/SeedData.cs

@@ -860,7 +860,7 @@ New accounts walk through an 18-step setup wizard to configure company informati
     }
 
     /// <summary>
-    /// Returns the 8 canonical default notification templates for a company.
+    /// Returns the canonical default notification templates for a company.
     /// Called by both SeedData and CompanySettingsController for auto-seeding.
     /// </summary>
     public static List<NotificationTemplate> BuildDefaultNotificationTemplates(int companyId)
@@ -934,12 +934,23 @@ New accounts walk through an 18-step setup wizard to configure company informati
                 CreatedAt = DateTime.UtcNow
             },
             new NotificationTemplate
+            {
+                NotificationType = NotificationType.QuoteSent,
+                Channel = NotificationChannel.Sms,
+                DisplayName = "Quote Sent (SMS)",
+                Subject = null,
+                Body = "{{companyName}}: Quote {{quoteNumber}} for {{quoteTotal}} is ready for your review. Approve or decline: {{approvalUrl}} Reply STOP to opt out.",
+                IsActive = true,
+                CompanyId = companyId,
+                CreatedAt = DateTime.UtcNow
+            },
+            new NotificationTemplate
             {
                 NotificationType = NotificationType.SmsConsentConfirmation,
                 Channel = NotificationChannel.Sms,
                 DisplayName = "SMS Enrollment Confirmation",
                 Subject = null,
-                Body = "{{companyName}}: You're now enrolled for SMS job & pickup updates. Reply STOP at any time to opt out. Msg & data rates may apply.",
+                Body = "{{companyName}}: You're now enrolled for SMS job updates and quote approvals. Reply STOP at any time to opt out. Msg & data rates may apply.",
                 IsActive = true,
                 CompanyId = companyId,
                 CreatedAt = DateTime.UtcNow