diff --git a/src/features/workbench/api/operational-task-client.test.ts b/src/features/workbench/api/operational-task-client.test.ts
index 7765278..02e99c3 100644
--- a/src/features/workbench/api/operational-task-client.test.ts
+++ b/src/features/workbench/api/operational-task-client.test.ts
@@ -1,5 +1,6 @@
 import { afterEach, describe, expect, it, vi } from "vitest";
 import {
+  fetchOperationalTaskNotifications,
   parseOperationalTask,
   parseOperationalTaskNotification
 } from "./operational-task-client";
@@ -105,4 +106,30 @@ describe("operational notification contract", () => {
       resolution_reason: "action_approved"
     }).lifecycle_status).toBe("resolved");
   });
+
+  it("requests the active inbox instead of hiding already read work", async () => {
+    let request: Request | undefined;
+    vi.stubGlobal("fetch", vi.fn(async (input, init) => {
+      request = new Request(input, init);
+      return new Response(JSON.stringify({
+        items: [{
+          ...notification,
+          lifecycle_status: "active",
+          status: "read",
+          version: 2,
+          read_at: time,
+          read_by: `principal:${id}`
+        }],
+        limit: 100,
+        offset: 0,
+        next_offset: null
+      }), { status: 200 });
+    }));
+
+    const items = await fetchOperationalTaskNotifications();
+
+    expect(items).toHaveLength(1);
+    expect(items[0]?.status).toBe("read");
+    expect(new URL(request!.url).searchParams.get("unread_only")).toBe("false");
+  });
 });
diff --git a/src/features/workbench/api/operational-task-client.ts b/src/features/workbench/api/operational-task-client.ts
index 010ee94..0e666eb 100644
--- a/src/features/workbench/api/operational-task-client.ts
+++ b/src/features/workbench/api/operational-task-client.ts
@@ -397,18 +397,18 @@ export async function decideOperationalTaskAccess(taskId: string, accessRequestI
 
 export async function fetchOperationalTaskNotifications(getAccessToken?: AccessTokenProvider, signal?: AbortSignal) {
   return notificationPageSchema.parse(await operationalTaskRequest(
-    "/operational-task-notifications?unread_only=true&limit=100&offset=0",
+    "/operational-task-notifications?unread_only=false&limit=100&offset=0",
     getAccessToken,
     { signal }
   )).items;
 }
 
 export async function acknowledgeOperationalTaskNotification(notificationId: string, version: number, requestId: string, getAccessToken?: AccessTokenProvider) {
-  await operationalTaskRequest(
+  return notificationSchema.parse(await operationalTaskRequest(
     `/operational-task-notifications/${encodeURIComponent(notificationId)}/acknowledge`,
     getAccessToken,
     { method: "POST", body: JSON.stringify({ request_id: requestId, expected_version: version }) }
-  );
+  ));
 }
 
 export async function fetchOperationalTaskSchedules(getAccessToken?: AccessTokenProvider, signal?: AbortSignal) {
diff --git a/src/features/workbench/hooks/use-operational-tasks.test.ts b/src/features/workbench/hooks/use-operational-tasks.test.ts
index 0aaf30e..a901945 100644
--- a/src/features/workbench/hooks/use-operational-tasks.test.ts
+++ b/src/features/workbench/hooks/use-operational-tasks.test.ts
@@ -3,6 +3,7 @@ import type { OperationalTask } from "../api/operational-task-client";
 import type { WorkbenchEvent } from "../api/workbench-sync-client";
 import {
   collectOperationalTaskEventChanges,
+  selectHeaderNotifications,
   toOperationalTaskCondition
 } from "./use-operational-tasks";
 
@@ -123,6 +124,37 @@ describe("operational task event invalidation", () => {
   });
 });
 
+describe("operational notification visibility", () => {
+  it("keeps a read notification visible until its business lifecycle is resolved", () => {
+    const notification = {
+      notification_id: "66666666-6666-4666-8666-666666666666",
+      task_id: "22222222-2222-4222-8222-222222222222",
+      kind: "action_approval_pending" as const,
+      title: "待审批工单",
+      description: "请审核派单内容",
+      required_permission: null,
+      lifecycle_status: "active" as const,
+      subject_type: "action" as const,
+      subject_id: "77777777-7777-4777-8777-777777777777",
+      resolved_at: null,
+      resolution_reason: null,
+      status: "read" as const,
+      version: 2,
+      created_at: "2026-09-24T00:00:00Z",
+      read_at: "2026-09-24T00:01:00Z",
+      read_by: "principal:11111111-1111-4111-8111-111111111111"
+    };
+
+    expect(selectHeaderNotifications([notification])).toEqual([notification]);
+    expect(selectHeaderNotifications([{
+      ...notification,
+      lifecycle_status: "resolved",
+      resolved_at: "2026-09-24T00:02:00Z",
+      resolution_reason: "action_approved"
+    }])).toEqual([]);
+  });
+});
+
 function event(
   eventSequence: number,
   taskId: string,
diff --git a/src/features/workbench/hooks/use-operational-tasks.ts b/src/features/workbench/hooks/use-operational-tasks.ts
index e834a5d..6a3c9ad 100644
--- a/src/features/workbench/hooks/use-operational-tasks.ts
+++ b/src/features/workbench/hooks/use-operational-tasks.ts
@@ -59,6 +59,10 @@ export function collectOperationalTaskEventChanges(events: WorkbenchEvent[]) {
   return { taskIds, deletedTaskIds, notificationsChanged };
 }
 
+export function selectHeaderNotifications(items: OperationalTaskNotification[]) {
+  return items.filter((item) => item.lifecycle_status === "active");
+}
+
 export function useOperationalTasks(
   getAccessToken: AccessTokenProvider | undefined,
   sync: WorkbenchSyncState
@@ -106,9 +110,7 @@ export function useOperationalTasks(
         forceRefreshRef.current = false;
         detailResetGenerationRef.current = sync.detailResetGeneration;
         setTasks(nextTasks);
-        setNotifications((sync.snapshot?.notifications ?? []).filter(
-          (item) => item.lifecycle_status === "active" && item.status === "unread"
-        ));
+        setNotifications(selectHeaderNotifications(sync.snapshot?.notifications ?? []));
         setAvailable(true);
         activatedRef.current = true;
         setError(null);
@@ -283,13 +285,15 @@ export function useOperationalTasks(
   }, [getAccessToken, refresh]);
 
   const acknowledgeNotification = useCallback(async (notificationId: string, version: number) => {
-    await acknowledgeOperationalTaskNotification(
+    const updated = await acknowledgeOperationalTaskNotification(
       notificationId,
       version,
       createOperationalRequestId(),
       getAccessToken
     );
-    setNotifications((current) => current.filter((item) => item.notification_id !== notificationId));
+    setNotifications((current) => selectHeaderNotifications(current.map((item) =>
+      item.notification_id === notificationId ? updated : item
+    )));
   }, [getAccessToken]);
 
   const loadEvidenceSnapshot = useCallback((taskId: string, evidenceId: string) =>
diff --git a/src/features/workbench/map-workbench-page.tsx b/src/features/workbench/map-workbench-page.tsx
index de46133..15155f7 100644
--- a/src/features/workbench/map-workbench-page.tsx
+++ b/src/features/workbench/map-workbench-page.tsx
@@ -766,7 +766,9 @@ export function MapWorkbenchPage({
     if (alert.id.startsWith("operational-task-notification:")) {
       const notificationId = alert.id.slice("operational-task-notification:".length);
       const notification = operationalTasks.notifications.find((item) => item.notification_id === notificationId);
-      if (notification) void operationalTasks.acknowledgeNotification(notificationId, notification.version);
+      if (notification?.status === "unread") {
+        void operationalTasks.acknowledgeNotification(notificationId, notification.version);
+      }
     }
     const conditionId = alert.conditionId ?? getScheduledConditionIdFromAlertId(alert.id);
     if (conditionId) {