diff --git a/web/hwlab-cloud-web/src/components/common/RefreshBoundary.vue b/web/hwlab-cloud-web/src/components/common/RefreshBoundary.vue
new file mode 100644
index 00000000..f6e1a4ef
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/common/RefreshBoundary.vue
@@ -0,0 +1,41 @@
+<script setup lang="ts">
+import { computed } from "vue";
+import LoadingState from "@/components/common/LoadingState.vue";
+
+const props = withDefaults(defineProps<{
+  loading: boolean;
+  mode?: "persistent" | "blocking";
+  hasContent?: boolean;
+  label?: string;
+  compact?: boolean;
+}>(), {
+  mode: "blocking",
+  hasContent: true,
+  label: "加载中",
+  compact: false
+});
+
+const showBlockingLoading = computed(() => props.loading && (props.mode === "blocking" || !props.hasContent));
+const showContent = computed(() => props.hasContent && !showBlockingLoading.value);
+const showEmpty = computed(() => !props.hasContent && !showBlockingLoading.value);
+</script>
+
+<template>
+  <div class="refresh-boundary" :data-loading="loading ? 'true' : 'false'" :data-mode="mode" :aria-busy="loading ? 'true' : 'false'">
+    <template v-if="showBlockingLoading">
+      <slot name="loading">
+        <LoadingState :label="label" :compact="compact" />
+      </slot>
+    </template>
+    <template v-else-if="showContent">
+      <slot />
+    </template>
+    <template v-else-if="showEmpty">
+      <slot name="empty" />
+    </template>
+  </div>
+</template>
+
+<style scoped>
+.refresh-boundary { min-width: 0; min-height: 0; }
+</style>
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue
index 8bf46173..73f1a561 100644
--- a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue
@@ -47,6 +47,14 @@ const workbench = useWorkbenchStore();
 const selectedSourceId = ref<string | null>(null);
 const selectedFileRef = ref<string | null>(null);
 const selectedTaskRef = ref<string | null>(null);
+type RefreshMode = "persistent" | "blocking";
+interface LoadFilesAndTasksOptions {
+  fileRef?: string | null;
+  taskId?: string | null;
+  reportLinkId?: string | null;
+  updateRoute?: boolean;
+  refreshMode?: RefreshMode;
+}
 
 // Tree / pane view state (local, not URL-authoritative)
 const taskSearch = ref("");
@@ -56,8 +64,10 @@ const taskPaneCollapsed = ref(false);
 const taskPaneWidth = ref(26);
 const reportPaneCollapsed = ref(false);
 const reportPaneWidth = ref(50);
+const taskTreeRefreshMode = ref<RefreshMode>("blocking");
 const providerOptionsReady = ref(false);
 const providerOptionsError = ref<string | null>(null);
+let taskWindowRefreshSeq = 0;
 
 // Dialog visibility
 const showInfo = ref(false);
@@ -172,7 +182,7 @@ async function refreshMdtodoProviderOptions(): Promise<void> {
 
 watch(selectedSourceId, async (sourceId) => {
   if (!sourceId || loading.value || selection.applyingRouteSelection.value) return;
-  await loadFilesAndTasks(sourceId, { updateRoute: true });
+  await loadFilesAndTasks(sourceId, { updateRoute: true, refreshMode: "blocking" });
 });
 
 watch(selectedTaskRef, async (taskRef) => {
@@ -190,6 +200,21 @@ watch(taskData.taskDetail, (detail) => {
   if (detail?.taskRef === selectedTaskRef.value && !editingBody.value) editBody.value = detail.body || "";
 });
 
+function beginTaskWindowRefresh(mode: RefreshMode): number {
+  const refreshSeq = ++taskWindowRefreshSeq;
+  taskTreeRefreshMode.value = mode;
+  taskData.taskLoading.value = true;
+  return refreshSeq;
+}
+
+function isCurrentTaskWindowRefresh(refreshSeq: number): boolean {
+  return refreshSeq === taskWindowRefreshSeq;
+}
+
+function finishTaskWindowRefresh(refreshSeq: number): void {
+  if (isCurrentTaskWindowRefresh(refreshSeq)) taskData.taskLoading.value = false;
+}
+
 async function loadPage(): Promise<void> {
   loading.value = true;
   error.value = null;
@@ -203,7 +228,7 @@ async function loadPage(): Promise<void> {
       : selectedSourceId.value && sources.some((s) => s.sourceId === selectedSourceId.value)
         ? selectedSourceId.value
         : sources[0]?.sourceId ?? null;
-    if (selectedSourceId.value) await loadFilesAndTasks(selectedSourceId.value, selection.routeSelectionOptions(true));
+    if (selectedSourceId.value) await loadFilesAndTasks(selectedSourceId.value, { ...selection.routeSelectionOptions(true), refreshMode: "blocking" });
     else await taskData.loadLinks(null);
   } catch (err) {
     setError(err);
@@ -212,30 +237,34 @@ async function loadPage(): Promise<void> {
   }
 }
 
-async function loadFilesAndTasks(sourceId: string, options: { fileRef?: string | null; taskId?: string | null; reportLinkId?: string | null; updateRoute?: boolean } = {}): Promise<void> {
-  taskData.taskLoading.value = true;
+async function loadFilesAndTasks(sourceId: string, options: LoadFilesAndTasksOptions = {}): Promise<void> {
+  const refreshMode = options.refreshMode ?? "blocking";
+  const refreshSeq = beginTaskWindowRefresh(refreshMode);
   try {
     await taskData.loadFiles(sourceId);
+    if (!isCurrentTaskWindowRefresh(refreshSeq)) return;
     selectedFileRef.value = options.fileRef && taskData.files.value.some((f) => f.fileRef === options.fileRef)
       ? options.fileRef
       : selectedFileRef.value && taskData.files.value.some((f) => f.fileRef === selectedFileRef.value)
         ? selectedFileRef.value
         : taskData.files.value[0]?.fileRef ?? null;
     await taskData.loadTaskWindow(sourceId, selectedFileRef.value, options.taskId ?? selectedTaskRef.value);
+    if (!isCurrentTaskWindowRefresh(refreshSeq)) return;
     const preferred = taskData.resolvePreferredTask(options.taskId ?? selectedTaskRef.value);
     selectedTaskRef.value = preferred?.taskRef ?? taskData.tasks.value[0]?.taskRef ?? null;
-    collapsedTaskRefs.value = new Set();
+    if (refreshMode === "blocking") collapsedTaskRefs.value = new Set();
     if (!selectedTaskRef.value) await Promise.all([taskData.loadLinks(null), taskData.loadTaskDetail(null)]);
     if (options.reportLinkId && selectedTaskRef.value) {
       await Promise.all([taskData.loadLinks(selectedTaskRef.value), taskData.loadTaskDetail(selectedTaskRef.value)]);
+      if (!isCurrentTaskWindowRefresh(refreshSeq)) return;
       await report.openReportPreviewById(selectedTaskRef.value, selectedTaskLinks.value, options.reportLinkId);
     } else if (options.updateRoute !== false) {
       void syncRoute({ replace: true });
     }
   } catch (err) {
-    setError(err);
+    if (isCurrentTaskWindowRefresh(refreshSeq)) setError(err);
   } finally {
-    taskData.taskLoading.value = false;
+    finishTaskWindowRefresh(refreshSeq);
   }
 }
 
@@ -243,9 +272,10 @@ async function selectFile(fileRef: string): Promise<void> {
   selectedFileRef.value = fileRef || null;
   report.closeReportPreview();
   if (!selectedSourceId.value) return;
-  taskData.taskLoading.value = true;
+  const refreshSeq = beginTaskWindowRefresh("blocking");
   try {
     await taskData.loadTaskWindow(selectedSourceId.value, selectedFileRef.value, null);
+    if (!isCurrentTaskWindowRefresh(refreshSeq)) return;
     selectedTaskRef.value = taskData.tasks.value[0]?.taskRef ?? null;
     collapsedTaskRefs.value = new Set();
     if (!selectedTaskRef.value) await Promise.all([taskData.loadLinks(null), taskData.loadTaskDetail(null)]);
@@ -253,7 +283,7 @@ async function selectFile(fileRef: string): Promise<void> {
   } catch (err) {
     setError(err);
   } finally {
-    taskData.taskLoading.value = false;
+    finishTaskWindowRefresh(refreshSeq);
   }
 }
 
@@ -279,8 +309,25 @@ async function applyRouteSelection(): Promise<void> {
   if (!nextSourceId) return;
   selection.applyingRouteSelection.value = true;
   try {
+    const sourceChanged = nextSourceId !== selectedSourceId.value;
+    const routeFileChanged = Boolean(sel.fileRef && sel.fileRef !== selectedFileRef.value);
+    const missingTaskWindow = !taskData.files.value.length || !taskData.tasks.value.length;
     selectedSourceId.value = nextSourceId;
-    await loadFilesAndTasks(nextSourceId, selection.routeSelectionOptions(false));
+    if (sourceChanged || routeFileChanged || missingTaskWindow) {
+      await loadFilesAndTasks(nextSourceId, { ...selection.routeSelectionOptions(false), refreshMode: "blocking" });
+      return;
+    }
+
+    const preferred = sel.taskId ? taskData.resolvePreferredTask(sel.taskId) : selectedTask.value;
+    if (sel.taskId && !preferred) {
+      await loadFilesAndTasks(nextSourceId, { ...selection.routeSelectionOptions(false), refreshMode: taskData.tasks.value.length ? "persistent" : "blocking" });
+      return;
+    }
+    selectedTaskRef.value = preferred?.taskRef ?? selectedTaskRef.value ?? taskData.tasks.value[0]?.taskRef ?? null;
+    if (sel.linkId && selectedTaskRef.value) {
+      await Promise.all([taskData.loadLinks(selectedTaskRef.value), taskData.loadTaskDetail(selectedTaskRef.value)]);
+      await report.openReportPreviewById(selectedTaskRef.value, selectedTaskLinks.value, sel.linkId);
+    }
   } finally {
     selection.applyingRouteSelection.value = false;
   }
@@ -302,8 +349,14 @@ function taskFingerprint(): string | undefined {
 async function reloadAfterMutation(): Promise<void> {
   const sourceId = selectedSourceId.value;
   if (!sourceId) return;
-  await taskData.loadFiles(sourceId);
-  await taskData.loadTaskWindow(sourceId, selectedFileRef.value, selectedTaskRef.value);
+  const refreshSeq = beginTaskWindowRefresh("persistent");
+  try {
+    await taskData.loadFiles(sourceId);
+    if (!isCurrentTaskWindowRefresh(refreshSeq)) return;
+    await taskData.loadTaskWindow(sourceId, selectedFileRef.value, selectedTaskRef.value);
+  } finally {
+    finishTaskWindowRefresh(refreshSeq);
+  }
 }
 
 async function saveTaskBasics(): Promise<void> {
@@ -414,7 +467,14 @@ async function reindexSource(): Promise<void> {
   const sourceId = selectedSourceId.value;
   if (!sourceId) return;
   const result = await source.reindexSource(sourceId);
-  if (result) await loadFilesAndTasks(sourceId);
+  if (result) {
+    await loadFilesAndTasks(sourceId, {
+      fileRef: selectedFileRef.value,
+      taskId: selectedTaskRef.value,
+      updateRoute: true,
+      refreshMode: taskData.tasks.value.length ? "persistent" : "blocking"
+    });
+  }
 }
 
 function setError(err: unknown): void {
@@ -444,7 +504,7 @@ function setError(err: unknown): void {
         :selected-source-id="selectedSourceId"
         :files="taskData.files.value"
         :selected-file-ref="selectedFileRef"
-        :file-loading="taskData.taskLoading.value"
+        :file-loading="taskData.taskLoading.value && taskTreeRefreshMode === 'blocking'"
         :reindex-loading="source.sourceReindexLoading.value"
         @update:selected-source-id="selectedSourceId = $event"
         @update:selected-file-ref="selectFile($event)"
@@ -484,6 +544,7 @@ function setError(err: unknown): void {
             :collapsed-task-refs="collapsedTaskRefs"
             :collapsed="taskPaneCollapsed"
             :loading="taskData.taskLoading.value"
+            :refresh-mode="taskTreeRefreshMode"
             :search="taskSearch"
             :status-filter="taskStatusFilter"
             @update:search="taskSearch = $event"
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue
index 4a01c22b..6aa3c834 100644
--- a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue
@@ -7,9 +7,9 @@ import type { MdtodoTaskDetailRecord, MdtodoTaskLinkRecord, MdtodoTaskRecord, Pr
 import type { ProviderProfile } from "@/types";
 import type { ApiError, ErrorDiagnostic } from "@/types";
 import type { ProviderProfileOption } from "@/stores/workbench-session";
-import LoadingState from "@/components/common/LoadingState.vue";
 import EmptyState from "@/components/common/EmptyState.vue";
 import ApiErrorDiagnostic from "@/components/common/ApiErrorDiagnostic.vue";
+import RefreshBoundary from "@/components/common/RefreshBoundary.vue";
 
 const props = defineProps<{
   task: MdtodoTaskRecord | null;
@@ -112,11 +112,8 @@ function normalizeTaskText(value?: string | null): string {
         <p v-else-if="launchBlocker" class="launch-blocker" data-testid="mdtodo-workbench-launch-blocker">{{ launchBlocker }}</p>
       </div>
 
-      <section class="task-detail-content" data-testid="mdtodo-task-editor">
-        <div class="task-detail-status">
-          <LoadingState v-if="detailLoading" compact label="同步任务详情" />
-          <p v-if="detailError" class="source-error" data-testid="mdtodo-task-detail-error">{{ detailError }}</p>
-        </div>
+      <RefreshBoundary class="task-detail-content" data-testid="mdtodo-task-editor" :loading="detailLoading" mode="blocking" :has-content="true" compact label="同步任务详情">
+        <p v-if="detailError" class="source-error task-detail-error" data-testid="mdtodo-task-detail-error">{{ detailError }}</p>
 
         <section class="task-body-section" data-testid="mdtodo-task-body">
           <div v-if="editingBody" class="inline-body-editor">
@@ -131,7 +128,7 @@ function normalizeTaskText(value?: string | null): string {
             <p v-else class="empty-inline">暂无补充正文</p>
           </article>
         </section>
-      </section>
+      </RefreshBoundary>
 
       <footer class="task-document-footer">
         <section class="report-link-section" data-testid="mdtodo-report-section">
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue
index 320430e3..15c990f0 100644
--- a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue
@@ -2,12 +2,13 @@
 <!-- Responsibility: Rxx outline tree — fold, search, status filter, current highlight, deep-link auto-expand. -->
 
 <script setup lang="ts">
+import { computed } from "vue";
 import type { MdtodoTaskPage, MdtodoTaskRecord } from "@/api";
-import LoadingState from "@/components/common/LoadingState.vue";
 import EmptyState from "@/components/common/EmptyState.vue";
+import RefreshBoundary from "@/components/common/RefreshBoundary.vue";
 import { statusLabel, taskIndent as indentStyle, useRxxTaskTree } from "@/composables/mdtodo/useMdtodoDisplay";
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
   tasks: MdtodoTaskRecord[];
   fileScopedTaskCount: number;
   taskPage: MdtodoTaskPage | null;
@@ -15,9 +16,12 @@ const props = defineProps<{
   collapsedTaskRefs: Set<string>;
   collapsed: boolean;
   loading: boolean;
+  refreshMode?: "persistent" | "blocking";
   search: string;
   statusFilter: string;
-}>();
+}>(), {
+  refreshMode: "blocking"
+});
 
 const emit = defineEmits<{
   "update:search": [value: string];
@@ -33,6 +37,10 @@ const tree = useRxxTaskTree(
   () => props.collapsedTaskRefs
 );
 
+const visibleTaskRows = computed(() => tree.visibleTaskRows.value);
+const hasVisibleTasks = computed(() => visibleTaskRows.value.length > 0);
+const showHeaderRefresh = computed(() => props.loading && props.refreshMode === "persistent" && hasVisibleTasks.value);
+
 function toggleTask(task: MdtodoTaskRecord): void {
   const next = new Set(props.collapsedTaskRefs);
   if (next.has(task.taskRef)) next.delete(task.taskRef);
@@ -46,9 +54,13 @@ function toggleTask(task: MdtodoTaskRecord): void {
     <header class="mdtodo-panel-header">
       <div class="task-tree-title">
         <h2>{{ collapsed ? '纲' : '任务树' }}</h2>
-        <p v-if="!collapsed">{{ tree.visibleTaskRows.value.length }} / {{ taskPage?.total ?? fileScopedTaskCount }} tasks<span v-if="taskPage?.hasMore"> · window {{ taskPage.limit }}</span></p>
+        <p v-if="!collapsed">{{ visibleTaskRows.length }} / {{ taskPage?.total ?? fileScopedTaskCount }} tasks<span v-if="taskPage?.hasMore"> · window {{ taskPage.limit }}</span></p>
       </div>
       <div class="task-pane-actions">
+        <span v-if="showHeaderRefresh" class="task-refresh-indicator" role="status" aria-live="polite" data-testid="mdtodo-task-tree-refreshing">
+          <span class="task-refresh-dot" aria-hidden="true" />
+          <span v-if="!collapsed">同步中</span>
+        </span>
         <button class="icon-button" type="button" data-testid="mdtodo-new-task-open" aria-label="新建任务" @click="emit('openCreateTask')">+</button>
         <button class="icon-button" type="button" data-testid="mdtodo-task-pane-toggle" :aria-label="collapsed ? '展开任务树' : '收起任务树'" @click="emit('update:collapsed', !collapsed)">{{ collapsed ? '›' : '‹' }}</button>
       </div>
@@ -64,18 +76,21 @@ function toggleTask(task: MdtodoTaskRecord): void {
           <option value="blocked">阻塞</option>
         </select>
       </div>
-      <LoadingState v-if="loading" compact label="同步文件和任务" />
-      <EmptyState v-else-if="!tree.visibleTaskRows.value.length" title="暂无任务" description="当前文件没有任务投影。" />
-      <div v-else class="task-tree" role="tree" aria-label="MDTODO task tree">
-        <div v-for="task in tree.visibleTaskRows.value" :key="task.taskRef" class="task-row-shell" :style="indentStyle(task)">
-          <button class="task-toggle" type="button" :data-testid="tree.hasChildren(task) ? 'mdtodo-task-toggle' : undefined" :aria-label="props.collapsedTaskRefs.has(task.taskRef) ? '展开任务' : '折叠任务'" :disabled="!tree.hasChildren(task)" @click.stop="toggleTask(task)">{{ tree.hasChildren(task) ? (props.collapsedTaskRefs.has(task.taskRef) ? '+' : '-') : '' }}</button>
-          <button class="task-row" role="treeitem" type="button" :data-selected="task.taskRef === selectedTaskRef" :data-task-ref="task.taskRef" :data-task-id="task.taskId" :data-task-status="task.status || 'unknown'" @click="emit('selectTask', task.taskRef)">
-            <span class="task-id">{{ task.taskId || 'R?' }}</span>
-            <strong>{{ task.title || task.taskId || 'Untitled task' }}</strong>
-            <span class="task-status" :data-status="task.status || 'unknown'">{{ statusLabel(task.status) }}</span>
-          </button>
+      <RefreshBoundary class="task-tree-boundary" :loading="loading" :mode="refreshMode" :has-content="hasVisibleTasks" compact label="同步文件和任务">
+        <template #empty>
+          <EmptyState title="暂无任务" description="当前文件没有任务投影。" />
+        </template>
+        <div class="task-tree" role="tree" aria-label="MDTODO task tree" :aria-busy="loading ? 'true' : 'false'" :data-refreshing="loading ? 'true' : 'false'">
+          <div v-for="task in visibleTaskRows" :key="task.taskRef" class="task-row-shell" :style="indentStyle(task)">
+            <button class="task-toggle" type="button" :data-testid="tree.hasChildren(task) ? 'mdtodo-task-toggle' : undefined" :aria-label="props.collapsedTaskRefs.has(task.taskRef) ? '展开任务' : '折叠任务'" :disabled="!tree.hasChildren(task)" @click.stop="toggleTask(task)">{{ tree.hasChildren(task) ? (props.collapsedTaskRefs.has(task.taskRef) ? '+' : '-') : '' }}</button>
+            <button class="task-row" role="treeitem" type="button" :data-selected="task.taskRef === selectedTaskRef" :data-task-ref="task.taskRef" :data-task-id="task.taskId" :data-task-status="task.status || 'unknown'" @click="emit('selectTask', task.taskRef)">
+              <span class="task-id">{{ task.taskId || 'R?' }}</span>
+              <strong>{{ task.title || task.taskId || 'Untitled task' }}</strong>
+              <span class="task-status" :data-status="task.status || 'unknown'">{{ statusLabel(task.status) }}</span>
+            </button>
+          </div>
         </div>
-      </div>
+      </RefreshBoundary>
     </template>
   </section>
 </template>
@@ -88,9 +103,13 @@ function toggleTask(task: MdtodoTaskRecord): void {
 .mdtodo-panel-header h2 { min-width: 0; margin: 0; overflow: hidden; color: #111827; font-size: 14px; line-height: 1.2; text-overflow: ellipsis; white-space: nowrap; }
 .mdtodo-panel-header p { margin: 2px 0 0; color: #64706b; font-size: 11px; }
 .task-pane-actions { display: flex; gap: 6px; margin-left: auto; }
+.task-refresh-indicator { display: inline-flex; min-width: 0; height: 30px; align-items: center; gap: 5px; color: #0f766e; font-size: 11px; font-weight: 800; white-space: nowrap; }
+.task-refresh-dot { width: 13px; height: 13px; border: 2px solid #b7e4df; border-top-color: #0f766e; border-radius: 999px; animation: task-refresh-spin 0.8s linear infinite; }
 .task-tools { display: grid; min-width: 0; grid-template-columns: minmax(0, 1fr) minmax(96px, 0.55fr); gap: 6px; }
 .task-tools input, .task-tools select { width: 100%; min-width: 0; height: 30px; border: 1px solid #cbd6dd; border-radius: 6px; background: #fff; color: #111827; padding: 0 8px; font: inherit; font-size: 12px; }
+.task-tree-boundary { display: grid; min-height: 0; }
 .task-tree { display: grid; min-height: 0; max-height: min(54dvh, 560px); align-content: start; gap: 1px; overflow: auto; border-top: 1px solid #e3e9ee; padding-top: 2px; }
+.task-tree[data-refreshing="true"] { border-top-color: #b7e4df; }
 .task-row-shell { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 4px; align-items: center; }
 .task-toggle { width: 24px; height: 24px; border: 1px solid transparent; border-radius: 4px; background: transparent; color: #52616b; font-weight: 850; line-height: 1; }
 .task-toggle:hover:not(:disabled) { border-color: #cbd6dd; background: #fff; }
@@ -106,6 +125,10 @@ function toggleTask(task: MdtodoTaskRecord): void {
 .task-status[data-status="blocked"] { border-color: #fed7aa; background: #fff7ed; color: #9a3412; }
 .icon-button { display: inline-grid; width: 30px; height: 30px; place-items: center; border: 1px solid #cbd6dd; border-radius: 6px; background: #fff; color: #111827; font-weight: 850; }
 .icon-button:disabled { opacity: 0.5; }
+@keyframes task-refresh-spin { to { transform: rotate(360deg); } }
+@media (prefers-reduced-motion: reduce) {
+  .task-refresh-dot { animation: none; }
+}
 @media (max-width: 720px) {
   .mdtodo-task-panel { height: 100%; align-content: stretch; grid-template-rows: auto auto minmax(0, 1fr); }
   .task-tree { max-height: none; }
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts
index 31eba068..78ef85c8 100644
--- a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts
@@ -23,18 +23,27 @@ export function useMdtodoTaskData() {
   const linkLoading = ref(false);
   const taskDetailError = ref<string | null>(null);
 
+  let filesRequestSeq = 0;
+  let taskWindowRequestSeq = 0;
+  let taskDetailRequestSeq = 0;
+  let linksRequestSeq = 0;
+
   const taskByRef = computed(() => new Map(tasks.value.map((task) => [task.taskRef, task])));
 
   async function loadFiles(sourceId: string): Promise<MdtodoFileRecord[]> {
+    const requestSeq = ++filesRequestSeq;
     const fileResponse = await projectManagementAPI.files(sourceId);
     if (!fileResponse.ok) throw fileResponse;
+    if (requestSeq !== filesRequestSeq) return files.value;
     files.value = fileResponse.data?.files ?? [];
     return files.value;
   }
 
   async function loadTaskWindow(sourceId: string, fileRef: string | null, preferredTaskRef?: string | null): Promise<MdtodoTaskRecord[]> {
+    const requestSeq = ++taskWindowRequestSeq;
     const taskResponse = await projectManagementAPI.tasks({ sourceId, fileRef, limit: TASK_WINDOW_LIMIT });
     if (!taskResponse.ok) throw taskResponse;
+    if (requestSeq !== taskWindowRequestSeq) return tasks.value;
     tasks.value = taskResponse.data?.tasks ?? [];
     taskPage.value = taskResponse.data?.page ?? null;
     return tasks.value;
@@ -46,34 +55,41 @@ export function useMdtodoTaskData() {
   }
 
   async function loadTaskDetail(taskRef: string | null): Promise<void> {
+    const requestSeq = ++taskDetailRequestSeq;
     taskDetailError.value = null;
     if (!taskRef) {
       taskDetail.value = null;
+      taskDetailLoading.value = false;
       return;
     }
     taskDetailLoading.value = true;
     try {
       const response = await projectManagementAPI.taskDetail(taskRef);
       if (!response.ok) throw response;
+      if (requestSeq !== taskDetailRequestSeq) return;
       taskDetail.value = response.data?.detail ?? null;
     } catch (err) {
+      if (requestSeq !== taskDetailRequestSeq) return;
       taskDetail.value = null;
       taskDetailError.value = err && typeof err === "object" && "error" in err ? String((err as { error?: string }).error || "任务详情加载失败") : "任务详情加载失败";
     } finally {
-      taskDetailLoading.value = false;
+      if (requestSeq === taskDetailRequestSeq) taskDetailLoading.value = false;
     }
   }
 
   async function loadLinks(taskRef: string | null): Promise<void> {
+    const requestSeq = ++linksRequestSeq;
     linkLoading.value = true;
     try {
       const response = await projectManagementAPI.workbenchLinks(taskRef ? { taskRef } : {});
       if (!response.ok) throw response;
+      if (requestSeq !== linksRequestSeq) return;
       links.value = response.data?.links ?? [];
     } catch {
+      if (requestSeq !== linksRequestSeq) return;
       links.value = [];
     } finally {
-      linkLoading.value = false;
+      if (requestSeq === linksRequestSeq) linkLoading.value = false;
     }
   }