feat(license): 退出授权 / 释放本实例（确认后 deactivate）

设置→授权 Pro 态管理员可退出：在线 LIC- 先调 opsx deactivate（含 activation_token），成功才清本地；失败保留现状。LICOFF- 仅解本机并提示后台名额可能仍占。禁静默清码。

frontend/src/api/license/index.ts

@@ -21,4 +21,6 @@ export interface LicenseInfo {
 export const licenseApi = {
   status: () => http.get<{ license: LicenseInfo; pro: boolean; features: string[] }>('/system/license'),
   activate: (key: string) => http.post<LicenseInfo>('/system/license/activate', { key }),
+  deactivate: () =>
+    http.post<{ offlineLocalOnly?: boolean; message?: string }>('/system/license/deactivate'),
 }

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

@@ -21,6 +21,14 @@ export default {
   activating: 'Activating…',
   activated: 'Pro activated — all features unlocked',
   activateFailed: 'Activation failed',
+  deactivate: 'Deactivate / release this instance',
+  deactivateConfirmTitle: 'Deactivate license?',
+  deactivateConfirmDesc: 'This releases the seat for this instance and returns the machine to Free. Online keys notify the license server first; on failure local state is kept (never silently cleared).',
+  deactivateConfirm: 'Confirm deactivate',
+  deactivating: 'Deactivating…',
+  deactivated: 'License deactivated — this machine is Free again',
+  deactivateFailed: 'Deactivation failed',
+  deactivateOfflineNote: 'Local offline license unbound. The server seat may still be occupied — ask ops to clear it if needed.',
   legacyBanner: 'Legacy HMAC keys are in a migration window. Please switch to a LIC- / LICOFF- key. Old keys stay valid until the window ends — never silently invalidated.',
   graceBanner: 'Offline grace: {{days}} day(s) left. Reconnect to re-verify.',
   status: {

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

@@ -21,6 +21,14 @@ export default {
   activating: '激活中…',
   activated: 'Pro 已激活,全部功能已解锁',
   activateFailed: '激活失败',
+  deactivate: '退出授权 / 释放本实例',
+  deactivateConfirmTitle: '退出授权？',
+  deactivateConfirmDesc: '将释放本实例占用的授权名额，本机回到免费版。在线授权会先通知授权服务器；失败则保留现状，不会静默清码。',
+  deactivateConfirm: '确认退出',
+  deactivating: '退出中…',
+  deactivated: '已退出授权，本机已回到免费版',
+  deactivateFailed: '退出授权失败',
+  deactivateOfflineNote: '已解除本机离线授权。后台名额可能仍占用，如需释放请联系运营处理。',
   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: {

frontend/src/pages/settings/components/LicenseSection.tsx

@@ -6,19 +6,22 @@ import { Button } from '@/components/ui/button'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
 import { Input } from '@/components/ui/input'
 import { KeyRound } from 'lucide-react'
+import { ConfirmDialog } from '@/components/ConfirmDialog'
 import { InstanceIdRow } from '@/components/InstanceIdRow'
 import { LicenseStatusBanners } from '@/components/LicenseStatusBanners'
 import { licenseApi } from '@/api/license'
 import { useLicense } from '@/hooks/useLicense'
 import { getUser } from '@/lib/auth-storage'
 
-/** 授权区块:当前版本状态 + 许可码激活(仅管理员可操作) */
+/** 授权区块:当前版本状态 + 许可码激活 / 退出授权(仅管理员可操作) */
 export const LicenseSection = memo(function LicenseSection() {
   const { t } = useTranslation('license')
   const { pro, info, reload } = useLicense()
   const isAdmin = getUser()?.role === 'admin'
   const [key, setKey] = useState('')
   const [activating, setActivating] = useState(false)
+  const [confirmOpen, setConfirmOpen] = useState(false)
+  const [deactivating, setDeactivating] = useState(false)
   const inputRef = useRef<HTMLInputElement>(null)
 
   const focusKey = () => {
@@ -41,6 +44,24 @@ export const LicenseSection = memo(function LicenseSection() {
     }
   }
 
+  const deactivate = async () => {
+    setDeactivating(true)
+    try {
+      const res = await licenseApi.deactivate()
+      if (res?.offlineLocalOnly) {
+        toast.success(res.message || t('deactivateOfflineNote'))
+      } else {
+        toast.success(res?.message || t('deactivated'))
+      }
+      setConfirmOpen(false)
+      reload()
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : t('deactivateFailed'))
+    } finally {
+      setDeactivating(false)
+    }
+  }
+
   const expiry = info?.expiresAt
     ? info.expiresAt > 0
       ? new Date(info.expiresAt * 1000).toLocaleDateString()
@@ -80,21 +101,40 @@ export const LicenseSection = memo(function LicenseSection() {
         {isAdmin && (
           <div className="space-y-2">
             <p className="text-xs text-muted-foreground">{t('activateHint')}</p>
-            <div className="flex gap-2">
+            <div className="flex flex-wrap gap-2">
               <Input
                 ref={inputRef}
                 value={key}
                 onChange={e => setKey(e.target.value)}
                 placeholder={t('keyPlaceholder')}
-                className="font-mono text-sm"
+                className="min-w-[12rem] flex-1 font-mono text-sm"
               />
               <Button onClick={() => void activate()} disabled={activating || !key.trim()}>
                 {activating ? t('activating') : t('activate')}
               </Button>
+              {pro && (
+                <Button
+                  variant="outline"
+                  className="border-destructive/40 text-destructive hover:bg-destructive/10"
+                  onClick={() => setConfirmOpen(true)}
+                  disabled={deactivating}
+                >
+                  {t('deactivate')}
+                </Button>
+              )}
             </div>
           </div>
         )}
       </CardContent>
+      <ConfirmDialog
+        open={confirmOpen}
+        onOpenChange={setConfirmOpen}
+        title={t('deactivateConfirmTitle')}
+        description={t('deactivateConfirmDesc')}
+        confirmText={t('deactivateConfirm')}
+        loading={deactivating}
+        onConfirm={() => void deactivate()}
+      />
     </Card>
   )
 })