feat(antigravity): 自动设置隐私并支持后台手动重试

新增 Antigravity OAuth 隐私设置能力，在账号创建、刷新、导入和后台
Token 刷新路径自动调用 setUserSettings + fetchUserInfo 关闭遥测；
持久化后同步内存 Extra，错误处理改为日志记录。

Made-with: Cursor

frontend/src/components/admin/account/AccountActionMenu.vue

@@ -32,6 +32,10 @@
                 {{ t('admin.accounts.refreshToken') }}
               </button>
             </template>
+            <button v-if="isAntigravityOAuth" @click="$emit('set-privacy', account); $emit('close')" class="flex w-full items-center gap-2 px-4 py-2 text-sm text-emerald-600 hover:bg-gray-100 dark:hover:bg-dark-700">
+              <Icon name="shield" size="sm" />
+              {{ t('admin.accounts.setPrivacy') }}
+            </button>
             <div v-if="hasRecoverableState" class="my-1 border-t border-gray-100 dark:border-dark-700"></div>
             <button v-if="hasRecoverableState" @click="$emit('recover-state', account); $emit('close')" class="flex w-full items-center gap-2 px-4 py-2 text-sm text-emerald-600 hover:bg-gray-100 dark:hover:bg-dark-700">
               <Icon name="sync" size="sm" />
@@ -55,7 +59,7 @@ import { Icon } from '@/components/icons'
 import type { Account } from '@/types'
 
 const props = defineProps<{ show: boolean; account: Account | null; position: { top: number; left: number } | null }>()
-const emit = defineEmits(['close', 'test', 'stats', 'schedule', 'reauth', 'refresh-token', 'recover-state', 'reset-quota'])
+const emit = defineEmits(['close', 'test', 'stats', 'schedule', 'reauth', 'refresh-token', 'recover-state', 'reset-quota', 'set-privacy'])
 const { t } = useI18n()
 const isRateLimited = computed(() => {
   if (props.account?.rate_limit_reset_at && new Date(props.account.rate_limit_reset_at) > new Date()) {
@@ -75,6 +79,7 @@ const isTempUnschedulable = computed(() => props.account?.temp_unschedulable_unt
 const hasRecoverableState = computed(() => {
   return props.account?.status === 'error' || Boolean(isRateLimited.value) || Boolean(isOverloaded.value) || Boolean(isTempUnschedulable.value)
 })
+const isAntigravityOAuth = computed(() => props.account?.platform === 'antigravity' && props.account?.type === 'oauth')
 const hasQuotaLimit = computed(() => {
   return (props.account?.type === 'apikey' || props.account?.type === 'bedrock') && (
     (props.account?.quota_limit ?? 0) > 0 ||