fix(license): shared invalid/grace banners + instance copy

Surface expired/over_instance/revoked red banners with CTAs via a
shared LicenseStatusBanners used by settings and ProGate. Hide seats
in product UI; keep HMAC dual-path and never silent-clear keys.

frontend/src/i18n/locales/zh/license.ts

@@ -6,7 +6,6 @@ export default {
   edition: '版本',
   expiry: '有效期',
   customer: '授权对象',
-  seats: '席位',
   instances: '实例上限',
   permanent: '永久',
   personalTitle: '个人版',
@@ -18,6 +17,14 @@ export default {
   activateFailed: '激活失败',
   legacyBanner: '旧版 HMAC 许可码迁移窗口：请尽快换发 LIC- / LICOFF- 授权码，旧码在窗口内仍有效，不会静默失效。',
   graceBanner: '离线宽限中：剩余 {{days}} 天，恢复网络后续验。',
+  status: {
+    expired: '授权已过期，Pro 功能已锁定',
+    expiredCta: '重新激活',
+    overInstance: '已超过实例上限',
+    overInstanceCta: '释放其它实例 / 换码',
+    revoked: '授权无效或已吊销',
+    revokedCta: '更换许可码',
+  },
   gate: {
     title: '{{feature}} 是 Pro 功能',
     desc: '升级 Pro 解锁平台全部分析能力;免费版可继续使用日志查询、部署管理与用户授权。',