save attachment from email in customer data and - or contracts

backend/src/routes/cachedEmail.routes.ts

@@ -158,6 +158,24 @@ router.get(
   cachedEmailController.downloadAttachment
 );
 
+// Verfügbare Dokumenten-Ziele für Anhänge (zum Speichern)
+// GET /api/emails/:id/attachment-targets
+router.get(
+  '/emails/:id/attachment-targets',
+  authenticate,
+  requirePermission('customers:read'),
+  cachedEmailController.getAttachmentTargets
+);
+
+// Anhang in Dokumentenfeld speichern
+// POST /api/emails/:id/attachments/:filename/save-to  { entityType, entityId?, targetKey }
+router.post(
+  '/emails/:id/attachments/:filename/save-to',
+  authenticate,
+  requirePermission('customers:update'),
+  cachedEmailController.saveAttachmentTo
+);
+
 // ==================== VERTRAGSZUORDNUNG ====================
 
 // E-Mail Vertrag zuordnen