feat(admin): add account privacy mode filter

frontend/src/i18n/locales/en.ts

@@ -1971,6 +1971,8 @@ export default {
         expiresAt: 'Expires At',
         actions: 'Actions'
       },
+      allPrivacyModes: 'All Privacy States',
+      privacyUnset: 'Unset',
       privacyTrainingOff: 'Training data sharing disabled',
       privacyCfBlocked: 'Blocked by Cloudflare, training may still be on',
       privacyFailed: 'Failed to disable training',

frontend/src/i18n/locales/zh.ts

@@ -2009,6 +2009,8 @@ export default {
         expiresAt: '过期时间',
         actions: '操作'
       },
+      allPrivacyModes: '全部Privacy状态',
+      privacyUnset: '未设置',
       privacyTrainingOff: '已关闭训练数据共享',
       privacyCfBlocked: '被 Cloudflare 拦截，训练可能仍开启',
       privacyFailed: '关闭训练数据共享失败',