Finanzen: Einstellungen, Rechnungen am Kunden, InvoiceNinja aus der Oberflaeche entfernt

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/components/TicketCard.jsx

@@ -12,7 +12,6 @@ import OwnSupportModal from './OwnSupportModal'
 import WorksheetSummary from './WorksheetSummary'
 import TicketProjects from './TicketProjects'
 import ProjectContextPanel from './ProjectContextPanel'
-import InvoicePanel from './InvoicePanel'
 import Tabs from './ui/Tabs'
 import Badge from './ui/Badge'
 import { StatusPill, UrgentPill } from './ui/StatusPill'
@@ -28,7 +27,6 @@ import { ticketTypeLabel } from '../lib/ticketStatus'
 const TABS = [
   { id: 'details', label: 'Details' },
   { id: 'worksheets', label: 'Arbeitsblätter' },
-  { id: 'invoices', label: 'Rechnungen' },
 ]
 
 export default function TicketCard({ ticket, onUpdate }) {
@@ -155,8 +153,6 @@ export default function TicketCard({ ticket, onUpdate }) {
                 />
               </div>
             )}
-
-            {activeTab === 'invoices' && <InvoicePanel ticket={ticket} />}
           </div>
         </div>
       )}