added invoices and status in cockpit, created info button for contract status types

backend/src/routes/cachedEmail.routes.ts

@@ -185,6 +185,24 @@ router.post(
   cachedEmailController.saveEmailAsPdf
 );
 
+// E-Mail als PDF exportieren und als Rechnung speichern
+// POST /api/emails/:id/save-as-invoice  { invoiceDate, invoiceType, notes? }
+router.post(
+  '/emails/:id/save-as-invoice',
+  authenticate,
+  requirePermission('contracts:update'),
+  cachedEmailController.saveEmailAsInvoice
+);
+
+// Anhang als Rechnung speichern
+// POST /api/emails/:id/attachments/:filename/save-as-invoice  { invoiceDate, invoiceType, notes? }
+router.post(
+  '/emails/:id/attachments/:filename/save-as-invoice',
+  authenticate,
+  requirePermission('contracts:update'),
+  cachedEmailController.saveAttachmentAsInvoice
+);
+
 // ==================== VERTRAGSZUORDNUNG ====================
 
 // E-Mail Vertrag zuordnen