- 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>
- Add verwaltungskosten_delete view with confirmation page
- Add delete URL route and template
- Fix template action buttons to use proper URLs for edit/delete
- Include audit logging for deletions
- Add comprehensive delete confirmation with entry details
- Remove non-functional details button from action group