- New detail view at /geschaeftsfuehrung/verwaltungskosten/<pk>/
showing invoice data, status, linked DMS documents, and emails
- Status change form in sidebar for quick workflow updates
- Link Verwaltungskosten list items to detail page
- Update email detail to link to VK detail instead of edit
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>