✨ feat(settings/announcements): sort by publishDate desc

Add reverse-chronological sorting for the announcements list so that the newest
items appear first in the dashboard.

No API changes; this only affects front-end display and user notifications.

web/src/components/settings/DashboardSetting.js

@@ -121,16 +121,16 @@ const DashboardSetting = () => {
           <SettingsDataDashboard options={inputs} refresh={onRefresh} />
         </Card>
 
-        {/* API信息管理 */}
-        <Card style={{ marginTop: '10px' }}>
-          <SettingsAPIInfo options={inputs} refresh={onRefresh} />
-        </Card>
-
         {/* 系统公告管理 */}
         <Card style={{ marginTop: '10px' }}>
           <SettingsAnnouncements options={inputs} refresh={onRefresh} />
         </Card>
 
+        {/* API信息管理 */}
+        <Card style={{ marginTop: '10px' }}>
+          <SettingsAPIInfo options={inputs} refresh={onRefresh} />
+        </Card>
+
         {/* 常见问答管理 */}
         <Card style={{ marginTop: '10px' }}>
           <SettingsFAQ options={inputs} refresh={onRefresh} />