* feat: 支持强制使用 AUTH LOGIN 以解决 outlook 等邮箱的发件问题 * fix: 修复通过 SSL 发送邮件时绕过 AUTH LOGIN 的问题 * fix: remove redundant branch, delete test file, add i18n translations - Remove redundant else-if branch in SendEmail since auth is already computed via getSMTPAuth() - Delete option_smtp_auth_test.go as requested - Add i18n translations for '强制使用 AUTH LOGIN' checkbox
