- Backend: new POST /api/documents endpoint with DocumentService.createDocument() reusing DocumentUpdateDTO; handles file upload, tags, sender, receivers - Frontend: new /documents/new route with same four-section form as edit page (Wer & Wann, Beschreibung, Transkription, Datei) but with empty fields - Home page: subtle '+ Neues Dokument' link above the document list Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>