{"message":"CSV File Manager API","endpoints":{"upload":"POST /upload","download":"GET /download/{filename}","list":"GET /files?type=transaction|wallet|result","available":"GET /files/available","coins":"GET /coins","delete":"DELETE /delete/{filename}","rename":"PUT /rename/{old_filename}","process":"POST /process","excel_sheets":"POST /excel/sheets","excel_convert":"POST /excel/convert"}}