chore(i18n): add permanent VIP label and handle permanent VIP case

为国际化多语言添加永久VIP的翻译文本，同时在激活成功弹窗中处理永久会员的过期日期显示逻辑，当过期时间为-1时显示永久而非固定日期

packages/ui/certd-client/src/components/vip-button/vip-modal-content.vue

@@ -139,7 +139,7 @@ async function doActive() {
       title: t("vip.successTitle"),
       content: t("vip.successContent", {
         vipLabel,
-        expireDate: dayjs(settingStore.plusInfo.expireTime).format("YYYY-MM-DD"),
+        expireDate: settingStore.plusInfo.expireTime === -1 ? t("vip.permanent") : dayjs(settingStore.plusInfo.expireTime).format("YYYY-MM-DD"),
       }),
       onOk() {
         if (!(settingStore.installInfo.bindUserId > 0)) {

packages/ui/certd-client/src/locales/langs/en-US/vip.ts

@@ -104,4 +104,5 @@ export default {
   not_effective: "Not effective or duration not sync?",
   learn_more: "More privileges",
   question: "More VIP related questions",
+  permanent: "Permanent",
 };

packages/ui/certd-client/src/locales/langs/zh-CN/vip.ts

@@ -103,4 +103,5 @@ export default {
   not_effective: "VIP没有生效/时长未同步?",
   learn_more: "更多特权(加VIP群等)",
   question: "更多VIP相关问题",
+  permanent: "永久",
 };