result = {'success': False, 'message': 'Invalid request'}

try:
    biz_type = params_kw.get('biz_type', '')
    biz_id = params_kw.get('biz_id', '')
    title = params_kw.get('title', '')
    applicant_id = params_kw.get('applicant_id', '')

    if not biz_type:
        result = {'success': False, 'message': 'biz_type is required'}
    elif not biz_id:
        result = {'success': False, 'message': 'biz_id is required'}
    elif not title:
        result = {'success': False, 'message': 'title is required'}
    else:
        # Use current user as applicant if not specified
        if not applicant_id:
            applicant_id = (await get_user()) or ''

        org_id = (await get_userorgid()) or '0'

        # Call the submit_approval function registered via load_dingdingflow()
        approval_result = await submit_approval(biz_type, biz_id, title, applicant_id, org_id)
        result = approval_result

except Exception as e:
    result = {'success': False, 'message': f'提交审批失败: {str(e)}'}

return result