feat: HTML email template, structured text storage and Freescout design

compose.yaml:
- Add hostname n8n.eks-intec.de to fix SMTP HELO rejection
- Add NODE_TLS_REJECT_UNAUTHORIZED=0 for internal CA trust

workflow-a-http.json:
- Replace Set node with Code node for reliable data extraction
- Strip HTML from thread bodies before AI analysis
- Preserve newlines as ¶ (pilcrow) in DB storage instead of flattening

workflow-b-http.json:
- Add Prepare Email Body node: restores ¶→\n, strips markdown,
  converts numbered lists to <ol><li>, generates HTML email template
- Switch emailSend from plain text to HTML+text (multipart)
- Fix Log Reply to Freescout: use MAX(created_at)+1s to ensure
  n8n reply appears as newest thread regardless of email header timestamps
- Fix emailSend typeVersion 1 with text field for reliable expression support
- Correct Freescout thread INSERT: type=2, cc/bcc='[]', customer_id via subquery

freescout-templates/:
- Modern reply_fancy.blade.php: blue header bar with mailbox name and
  ticket number badge, quoted thread styling with left border accent, footer
- Modern auto_reply.blade.php: matching design for auto-reply emails
- Deploy to server: scp to /tmp, apply with sudo cp + artisan view:clear

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

compose.yaml

@@ -24,6 +24,7 @@ services:
   n8n:
     image: docker.n8n.io/n8nio/n8n
     restart: always
+    hostname: n8n.eks-intec.de
     ports:
       - "127.0.0.1:5678:5678"
     labels:
@@ -51,6 +52,7 @@ services:
       - WEBHOOK_URL=https://${SUBDOMAIN}.${DOMAIN_NAME}/
       - GENERIC_TIMEZONE=${GENERIC_TIMEZONE}
       - TZ=${GENERIC_TIMEZONE}
+      - NODE_TLS_REJECT_UNAUTHORIZED=0
     volumes:
       - n8n_data:/home/node/.n8n
       - ./local-files:/files