feat(developers): add service URLs and onboarding guide to provisioning reply and success page

Ticket replies now include full onboarding info (webmail, IMAP/SMTP, Mattermost, Gitea, SilverDESK URLs) instead of raw provisioning status. Confirmation success page uses clickable service links with email client config details.

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

BlazorApp/Endpoints/DeveloperEndpoints.cs

@@ -117,18 +117,35 @@ public static class DeveloperEndpoints
             // Send follow-up ticket reply with results
             var resultContent = success
                 ? $"""
-                    Your accounts have been successfully provisioned:
+                    Your accounts have been successfully provisioned! Here's how to access your services:
 
-                    {message}
+                    **Email**: {deployment.Username}@silverlabs.uk
+                    - Webmail: [mail.silverlined.uk](https://mail.silverlined.uk)
+                    - IMAP: `mail.silverlined.uk:993` (SSL)
+                    - SMTP: `mail.silverlined.uk:465` (SSL)
 
-                    You can now log in to all services with your SilverDESK credentials.
+                    **Mattermost** (Team Chat): [ops.silverlined.uk](https://ops.silverlined.uk)
+
+                    **Gitea** (Source Code): [git.silverlabs.uk](https://git.silverlabs.uk)
+
+                    **SilverDESK** (Support & Tickets): [silverdesk.silverlabs.uk](https://silverdesk.silverlabs.uk)
+
+                    All services use the same password you entered during activation.
+
+                    ---
+                    *Provisioning status: {message}*
                     """
                 : $"""
                     Account provisioning completed with some issues:
 
                     {message}
 
-                    Please contact an administrator if you have trouble accessing any services.
+                    Some services may not be available yet. Please contact an administrator for assistance.
+
+                    Once resolved, your services will be:
+                    - **Email**: {deployment.Username}@silverlabs.uk — [mail.silverlined.uk](https://mail.silverlined.uk)
+                    - **Mattermost**: [ops.silverlined.uk](https://ops.silverlined.uk)
+                    - **Gitea**: [git.silverlabs.uk](https://git.silverlabs.uk)
                     """;
 
             await provisioningService.SendTicketReplyAsync(deployment.TicketId, resultContent, "close");