fix contract recap

backend/src/contracts/contracts.py

@@ -250,12 +250,13 @@ def get_contract_recap(
         )
     form = form_service.get_one(session, form_id=form_id)
     contracts = service.get_all(session, user, forms=[form.name])
+    filename = f'{form.name}_recapitulatif_contrats.ods'
     return StreamingResponse(
         io.BytesIO(generate_recap(contracts, form)),
-        media_type='application/zip',
+        media_type='application/vnd.oasis.opendocument.spreadsheet',
         headers={
             'Content-Disposition': (
-                'attachment; filename=filename.ods'
+                f'attachment; filename={filename}'
             )
         }
     )