feat(license): show Instance ID with copy on settings + ProGate

Always return machine fingerprint instanceId from license status for
offline LICOFF- binding. Shared InstanceIdRow (zh/en) above activate.

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

@@ -7,6 +7,12 @@ export default {
   expiry: 'Valid until',
   customer: 'Licensed to',
   instances: 'Instance limit',
+  instanceId: 'Instance ID',
+  instanceIdHint: 'Provide this ID for offline licensing. Machine fingerprint only — no personal data.',
+  instanceIdCopied: 'Instance ID copied',
+  instanceIdCopyFailed: 'Copy failed — select manually',
+  copy: 'Copy',
+  activateHint: 'Online keys start with LIC-; offline LICOFF- keys must bind the Instance ID above',
   permanent: 'perpetual',
   personalTitle: 'Personal',
   teamTitle: 'Team',