Add workshop generate-link type, Email DNS for domains, and editor polish.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/PROJECT_CONTEXT.md

@@ -142,7 +142,7 @@ Add to `/etc/hosts` (one line per tenant):
 | `/businesses/:businessId/invoices` | Business invoices list |
 | `/businesses/:businessId/invoices/new` | Issue invoice (full page) |
 | `/users` | Users (business filter: Customer vs Manager → Admin/Editor/Viewer; Admin assignable by super-admin only; owners locked) |
-| `/websites` | Websites / domains (Deploy when `deploy_slug` set). Edit domain can optionally update DNS (Arvan or Cloudflare, same tenant records as Businesses). Overflow ⋯ includes website/dashboard links, **AI prompts**, and remove. **Parked domains** button: alias hosts 301 to the main domain. Per alias, choose **Arvan** or **Cloudflare** for DNS (`@` + `www` only, not proxied); SSL is always Let's Encrypt on the websites VM. |
+| `/websites` | Websites / domains (Deploy when `deploy_slug` set). Edit domain can optionally update DNS (Arvan or Cloudflare, same tenant records as Businesses). Overflow ⋯ includes website/dashboard links, **Email DNS** (Stalwart DKIM + MX/SPF on Arvan or Cloudflare), **AI prompts**, and remove. **Parked domains** button: alias hosts 301 to the main domain. Per alias, choose **Arvan** or **Cloudflare** for DNS (`@` + `www` only, not proxied); SSL is always Let's Encrypt on the websites VM. |
 | `/templates` | Global AI prompt templates. Assign from Businesses or Websites ⋯ → **AI prompts** (add from library; public pack link). |
 | `/settings` | Platform settings (invoice templates + item templates) |
 | `/settings/invoice-templates/new` | Create invoice template |