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/pages/AdminTariffs.tsx

@@ -44,6 +44,16 @@ const XIcon = () => (
   </svg>
 );
 
+const GiftIcon = () => (
+  <svg className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+    <path
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      d="M21 11.25v8.25a1.5 1.5 0 01-1.5 1.5H5.25a1.5 1.5 0 01-1.5-1.5v-8.25M12 4.875A2.625 2.625 0 109.375 7.5H12m0-2.625V7.5m0-2.625A2.625 2.625 0 1114.625 7.5H12m0 0V21m-8.625-9.75h18c.621 0 1.125-.504 1.125-1.125v-1.5c0-.621-.504-1.125-1.125-1.125h-18c-.621 0-1.125.504-1.125 1.125v1.5c0 .621.504 1.125 1.125 1.125z"
+    />
+  </svg>
+);
+
 export default function AdminTariffs() {
   const { t } = useTranslation();
   const navigate = useNavigate();
@@ -210,7 +220,7 @@ export default function AdminTariffs() {
                     }`}
                     title={t('admin.tariffs.toggleTrial')}
                   >
-                    T
+                    <GiftIcon />
                   </button>
 
                   {/* Edit */}