fix(grok): 修复授权文案的i18n占位符

frontend/src/i18n/locales/en/admin/accounts.ts

@@ -1013,7 +1013,7 @@ export default {
           emailPasswordDesc:
             'Sign in with a Grok web email and password. The server uses the password only to obtain an ephemeral SSO cookie, then converts it to Build OAuth credentials. Neither the password nor raw SSO is stored on the account.',
           emailPasswordInputLabel: 'email----password',
-          emailPasswordPlaceholder: 'user@example.com----your-password\nMultiple lines supported',
+          emailPasswordPlaceholder: "user{'@'}example.com----your-password\nMultiple lines supported",
           emailPasswordHint:
             'Format: email----password (password may contain -). Requires YesCaptcha keys; use a matching-region proxy when needed.',
           pleaseEnterPassword: 'Please enter email----password (one per line)',

frontend/src/i18n/locales/zh/admin/accounts.ts

@@ -1066,7 +1066,7 @@ export default {
           emailPasswordDesc:
             '使用 Grok 网页邮箱与密码登录。服务端仅用密码换取临时 SSO 再转 Build OAuth；密码与 raw SSO 均不会写入账号凭据。',
           emailPasswordInputLabel: '邮箱----密码',
-          emailPasswordPlaceholder: 'user@example.com----your-password\n支持多个，每行一组',
+          emailPasswordPlaceholder: "user{'@'}example.com----your-password\n支持多个，每行一组",
           emailPasswordHint: '格式：email----password（密码可含 -）。需要配置 YesCaptcha 密钥；建议搭配代理。',
           pleaseEnterPassword: '请输入 email----password（每行一组）',
           pleaseEnterSSOToken: '请输入 SSO Token',