- Update Destinataer template: added 8 missing fields (ist_abkoemmling, haushaltsgroesse, monatliche_bezuege, vermoegen, unterstuetzung_bestaetigt, vierteljaehrlicher_betrag, studiennachweis_erforderlich, letzter_studiennachweis)
- Update Laendereien template: added 20 missing fields including property details, tenant info, contract terms, financial data, and tax information
- Fix JavaScript template download functionality: correct block name from extra_js to javascript
- Add comprehensive debugging and error handling for download process
- Improve CSV formatting with proper quoting for text fields containing spaces
- Add fallback download methods for better browser compatibility
All CSV templates now include complete field sets matching current model definitions.
