fix: 完善自动导入异常中断与恢复

- 自动导入基础设施异常触发批次熔断，保留完整日志并输出安全错误信息

- 增加恢复令牌与租约围栏、无文档失败项重建及消息退避机制

- 前端展示中断状态并在状态请求失败后自动恢复轮询

- 补充批次中断迁移、配置与并发异常路径测试

easyflow-ui-admin/app/src/components/page/PageData.test.ts

@@ -59,4 +59,35 @@ describe('page data recovery', () => {
     expect(get).toHaveBeenCalledTimes(2);
     expect(wrapper.text()).not.toContain('数据加载失败，请重试');
   });
+
+  it('coalesces repeated reloads while a page request is still running', async () => {
+    let resolveInitialRequest: (value: {
+      data: { records: never[]; totalRow: number };
+    }) => void = () => {};
+    const initialRequest = new Promise<{
+      data: { records: never[]; totalRow: number };
+    }>((resolve) => {
+      resolveInitialRequest = resolve;
+    });
+    const get = vi
+      .fn()
+      .mockReturnValueOnce(initialRequest)
+      .mockResolvedValue({ data: { records: [], totalRow: 0 } });
+    const wrapper = mount(PageData, {
+      global: {
+        directives: { loading: {} },
+      },
+      props: { pageUrl: '/page', requestClient: { get } },
+    });
+
+    const firstReload = (wrapper.vm as any).reload({ silent: true });
+    const secondReload = (wrapper.vm as any).reload({ silent: true });
+
+    expect(get).toHaveBeenCalledTimes(1);
+    resolveInitialRequest({ data: { records: [], totalRow: 0 } });
+    await Promise.all([firstReload, secondReload]);
+    await flushPromises();
+
+    expect(get).toHaveBeenCalledTimes(2);
+  });
 });

easyflow-ui-admin/app/src/components/page/PageData.vue

@@ -24,6 +24,15 @@ interface PageDataState {
   pageSize: number;
 }
 
+interface PageDataReloadOptions {
+  silent?: boolean;
+}
+
+interface PageDataRequest {
+  silent: boolean;
+  version: number;
+}
+
 const props = withDefaults(defineProps<PageDataProps>(), {
   pageSize: 10,
   pageSizes: () => [10, 20, 50, 100],
@@ -41,7 +50,9 @@ const pageList = ref<PageDataRow[]>([]);
 const loading = ref(false);
 const loadError = ref<unknown>();
 const queryParams = ref<Record<string, any>>({ ...props.initialQueryParams });
-let pageRequest = 0;
+let activePageRequest: null | Promise<void> = null;
+let pendingPageRequest: null | PageDataRequest = null;
+let pageRequestVersion = 0;
 
 const pageInfo = reactive({
   pageNumber: Math.max(1, Math.trunc(props.initialPageNumber)),
@@ -60,11 +71,7 @@ const doGet = async (params: Record<string, any>) => {
   return { data };
 };
 
-// 获取页面数据
-const getPageList = async () => {
-  const request = ++pageRequest;
-  loading.value = true;
-  loadError.value = undefined;
+const loadPageListOnce = async (request: PageDataRequest) => {
   try {
     const res = await doGet({
       pageNumber: pageInfo.pageNumber,
@@ -72,21 +79,61 @@ const getPageList = async () => {
       ...props.extraQueryParams,
       ...queryParams.value,
     });
-    if (request === pageRequest) {
+    if (request.version === pageRequestVersion) {
       pageList.value = res.data?.records || [];
       pageInfo.total = res.data?.totalRow || 0;
     }
   } catch (error) {
-    if (request === pageRequest) {
+    if (request.version === pageRequestVersion) {
       loadError.value = error;
-      pageList.value = [];
-      pageInfo.total = 0;
+      if (!request.silent || pageList.value.length === 0) {
+        pageList.value = [];
+        pageInfo.total = 0;
+      }
     }
-  } finally {
-    if (request === pageRequest) loading.value = false;
   }
 };
 
+const requestPageList = (silent: boolean) => {
+  const request: PageDataRequest = {
+    silent: silent && pageList.value.length > 0,
+    version: ++pageRequestVersion,
+  };
+  loadError.value = undefined;
+  if (!request.silent) {
+    loading.value = true;
+  }
+  if (activePageRequest) {
+    pendingPageRequest = pendingPageRequest
+      ? {
+          silent: pendingPageRequest.silent && request.silent,
+          version: request.version,
+        }
+      : request;
+    return activePageRequest;
+  }
+
+  const drainPageRequests = async () => {
+    let currentRequest: null | PageDataRequest = request;
+    while (currentRequest) {
+      pendingPageRequest = null;
+      await loadPageListOnce(currentRequest);
+      currentRequest = pendingPageRequest;
+    }
+  };
+  activePageRequest = drainPageRequests().finally(() => {
+    activePageRequest = null;
+    loading.value = false;
+  });
+  return activePageRequest;
+};
+
+// 获取页面数据
+const getPageList = () => requestPageList(false);
+
+const reload = (options: PageDataReloadOptions = {}) =>
+  requestPageList(Boolean(options.silent));
+
 // 分页事件处理
 const handleSizeChange = (newSize: number) => {
   pageInfo.pageSize = newSize;
@@ -138,7 +185,7 @@ const setQuery = (newQueryParams: Record<string, any>) => {
 // 暴露方法给父组件
 defineExpose({
   getPageState,
-  reload: getPageList,
+  reload,
   patchRowById,
   setQuery,
 });