feat: improve tariff builder UI

- Move promo groups from Servers tab to Extra tab
- Add isActive toggle in Extra tab (tariff status)
- Remove trial toggle from form (not needed for now)
- Replace "T" letter with gift icon for trial toggle in tariff list
- Add i18n translations for new status fields

src/locales/zh.json

@@ -1125,6 +1125,11 @@
       "dailyDeductionDesc": "每天从用户余额中扣除",
       "dailyPriceRequired": "请输入大于0的每日价格",
       "cannotSave": "无法保存套餐：",
+      "statusTitle": "套餐状态",
+      "isActiveLabel": "已激活",
+      "isActiveHint": "未激活的套餐不会显示给用户",
+      "isTrialLabel": "试用套餐",
+      "isTrialHint": "可用于免费试用期",
       "validation": {
         "nameRequired": "请输入套餐名称",
         "nameLength": "名称必须为2到50个字符",