fix: persist system update history

frontend/src/pages/governance/SystemUpdatePage.vue

@@ -111,7 +111,7 @@
       <div class="section-heading">
         <div>
           <h2>历史更新记录</h2>
-          <p>记录版本获取、下载和重启安装操作。</p>
+          <p>记录版本获取、下载、重启安装和最终执行结果。</p>
         </div>
         <span>最近 {{ historyRows.length }} 条</span>
       </div>
@@ -446,6 +446,7 @@ async function loadHistory(silent = false) {
   }
   try {
     const result = await getAuditLogs({
+      occurredFrom: '1970-01-01T00:00:00Z',
       objectType: 'SYSTEM_UPDATE',
       sort: 'occurredAt,desc',
       page: 1,
@@ -724,6 +725,9 @@ function actionLabel(action: string) {
       SYSTEM_UPDATE_CHECK: '获取版本',
       SYSTEM_UPDATE_DOWNLOAD_REQUEST: '下载更新包',
       SYSTEM_UPDATE_REQUEST: '立即更新并重启',
+      SYSTEM_UPDATE_SUCCEEDED: '更新完成',
+      SYSTEM_UPDATE_FAILED: '更新失败',
+      SYSTEM_UPDATE_RECOVERY_REQUIRED: '更新需人工恢复',
     }[action] || action
   );
 }