fix: 清理前端异步请求生命周期

- 页面卸载和弹窗关闭时终止 SSE

- 为版本检查增加超时、中止与重复请求保护

easyflow-ui-usercenter/packages/effects/layouts/src/widgets/check-updates/check-updates.vue

@@ -20,6 +20,8 @@ const props = withDefaults(defineProps<Props>(), {
 });
 
 let isCheckingUpdates = false;
+let versionCheckController: AbortController | null = null;
+const VERSION_CHECK_TIMEOUT_MS = 10_000;
 const currentVersionTag = ref('');
 const lastVersionTag = ref('');
 const timer = ref<ReturnType<typeof setInterval>>();
@@ -36,6 +38,12 @@ const [UpdateNoticeModal, modalApi] = useEasyFlowModal({
 });
 
 async function getVersionTag() {
+  const controller = new AbortController();
+  versionCheckController = controller;
+  const timeout = setTimeout(
+    () => controller.abort(),
+    VERSION_CHECK_TIMEOUT_MS,
+  );
   try {
     if (
       location.hostname === 'localhost' ||
@@ -47,14 +55,22 @@ async function getVersionTag() {
       cache: 'no-cache',
       method: 'HEAD',
       redirect: 'manual',
+      signal: controller.signal,
     });
 
     return (
       response.headers.get('etag') || response.headers.get('last-modified')
     );
-  } catch {
-    console.error('Failed to fetch version tag');
+  } catch (error) {
+    if (!controller.signal.aborted) {
+      console.error('Failed to fetch version tag', error);
+    }
     return null;
+  } finally {
+    clearTimeout(timeout);
+    if (versionCheckController === controller) {
+      versionCheckController = null;
+    }
   }
 }
 
@@ -71,23 +87,35 @@ async function checkForUpdates() {
   }
 
   if (lastVersionTag.value !== versionTag && versionTag) {
-    clearInterval(timer.value);
+    stop();
     handleNotice(versionTag);
   }
 }
+
+async function runUpdateCheck() {
+  if (isCheckingUpdates) return;
+  isCheckingUpdates = true;
+  try {
+    await checkForUpdates();
+  } finally {
+    isCheckingUpdates = false;
+  }
+}
+
 function handleNotice(versionTag: string) {
   currentVersionTag.value = versionTag;
   modalApi.open();
 }
 
 function start() {
+  stop();
   if (props.checkUpdatesInterval <= 0) {
     return;
   }
 
   // 每 checkUpdatesInterval(默认值为1) 分钟检查一次
   timer.value = setInterval(
-    checkForUpdates,
+    () => void runUpdateCheck(),
     props.checkUpdatesInterval * 60 * 1000,
   );
 }
@@ -96,18 +124,21 @@ function handleVisibilitychange() {
   if (document.hidden) {
     stop();
   } else {
-    if (!isCheckingUpdates) {
-      isCheckingUpdates = true;
-      checkForUpdates().finally(() => {
-        isCheckingUpdates = false;
+    runUpdateCheck().finally(() => {
+      if (!document.hidden) {
         start();
-      });
-    }
+      }
+    });
   }
 }
 
 function stop() {
-  clearInterval(timer.value);
+  if (timer.value !== undefined) {
+    clearInterval(timer.value);
+    timer.value = undefined;
+  }
+  versionCheckController?.abort();
+  versionCheckController = null;
 }
 
 onMounted(() => {