diff --git a/src/features/workbench/api/operational-task-client.test.ts b/src/features/workbench/api/operational-task-client.test.ts
index ce5a7fe..1a2f7a5 100644
--- a/src/features/workbench/api/operational-task-client.test.ts
+++ b/src/features/workbench/api/operational-task-client.test.ts
@@ -42,6 +42,35 @@ function task(generation: number | null | undefined = 2) {
 afterEach(() => vi.unstubAllGlobals());
 
 describe("operational task contract", () => {
+  describe.each(["event_investigation", "external_work_order", "scheduled_flow"])("%s replay context", (taskType) => {
+    const replayContext = { replay_id: id, knowledge_cutoff: time, batch_sequence: 1 };
+
+    it.each([null, replayContext])("loads summaries and details with replay_context %j", (context) => {
+      const value = task();
+      const detail = { ...value, task_type: taskType, source: { ...value.source, replay_context: context } };
+      const {
+        latest_plan: _latestPlan, latest_report: _latestReport, evidence: _evidence,
+        actions: _actions, permissions: _permissions, ...summary
+      } = detail;
+
+      expect(parseOperationalTaskSummary(summary).source).toHaveProperty("replay_context", context);
+      expect(parseOperationalTask(detail).source).toHaveProperty("replay_context", context);
+    });
+
+    it.each([
+      { ...replayContext, replay_id: "not-a-uuid" },
+      { ...replayContext, knowledge_cutoff: "not-a-date" },
+      { ...replayContext, batch_sequence: 0 },
+      { ...replayContext, batch_sequence: 1.5 },
+      { ...replayContext, unexpected: true }
+    ])("rejects invalid replay metadata %j", (context) => {
+      const value = task();
+      expect(() => parseOperationalTask({
+        ...value, task_type: taskType, source: { ...value.source, replay_context: context }
+      })).toThrow();
+    });
+  });
+
   it("loads task runs used to resolve a selected report round", async () => {
     const run = {
       run_id: id,
diff --git a/src/features/workbench/api/operational-task-client.ts b/src/features/workbench/api/operational-task-client.ts
index 070cfbd..c2832df 100644
--- a/src/features/workbench/api/operational-task-client.ts
+++ b/src/features/workbench/api/operational-task-client.ts
@@ -13,7 +13,12 @@ const taskSourceSchema = z.object({
   external_id: z.string().min(1).nullable(),
   external_revision: z.number().int().positive().nullable(),
   event_kind: z.string().min(1).nullable(),
-  deleted_at: workbenchDateTimeSchema.nullish()
+  deleted_at: workbenchDateTimeSchema.nullish(),
+  replay_context: z.object({
+    replay_id: z.string().uuid(),
+    knowledge_cutoff: workbenchDateTimeSchema,
+    batch_sequence: z.number().int().positive()
+  }).strict().nullish()
 }).strict();
 const taskTriggerSchema = z.object({
   kind: z.enum(["schedule", "external_sync", "event", "manual"]),
diff --git a/tests/browser/operational-task-loading.e2e.ts b/tests/browser/operational-task-loading.e2e.ts
new file mode 100644
index 0000000..ef0b807
--- /dev/null
+++ b/tests/browser/operational-task-loading.e2e.ts
@@ -0,0 +1,77 @@
+import { expect, test } from "@playwright/test";
+import type { OperationalTask, OperationalTaskSummary } from "../../src/features/workbench/api/operational-task-client";
+import { mockAgentApi } from "./support/mock-agent-api";
+import { mockWorkbenchContext } from "./support/mock-workbench-context";
+
+test("调查和预约任务接收 Server 返回的空回放上下文并展示详情", async ({ page }, testInfo) => {
+  await page.emulateMedia({ reducedMotion: "reduce" });
+  const now = new Date().toISOString();
+  const id = "72000000-0000-4000-8000-000000000001";
+  const appointmentId = "72000000-0000-4000-8000-000000000002";
+  const summary: OperationalTaskSummary = {
+    project_id: "324ff7ee-c2d4-5184-a84b-48fb14a2933e", task_id: id,
+    task_type: "event_investigation", workflow: "burst_report",
+    lifecycle_status: "waiting_human", active_run: null, status: "waiting_human",
+    priority: "urgent", revision: 1, execution_generation: 1, execution_request_id: id,
+    title: "凤阳爆管调查加载核验", summary: "核对调查任务详情",
+    source: { kind: "external_system", external_id: id, external_revision: 1,
+      event_kind: "burst_report", replay_context: null },
+    trigger: { kind: "event", occurred_at: now, detail: "核对调查任务详情" },
+    scheduled_for: null, agent_session_id: null, agent_lease_expires_at: null,
+    current_plan_revision: null, current_report_revision: null, created_at: now, updated_at: now
+  };
+  const appointment: OperationalTaskSummary = {
+    ...summary, task_id: appointmentId, task_type: "external_work_order", workflow: "external-work-order",
+    lifecycle_status: "open", status: "running", priority: "normal", execution_request_id: appointmentId,
+    title: "凤阳预约维修加载核验", summary: "核对预约任务详情", scheduled_for: now,
+    source: { ...summary.source, external_id: `peripheral_sample:${appointmentId}`, event_kind: "general" },
+    trigger: { kind: "external_sync", occurred_at: now, detail: "核对预约任务详情" }
+  };
+  const summaries = [summary, appointment];
+  const tasks: OperationalTask[] = summaries.map((item) => ({
+    ...item, latest_plan: null, latest_report: null, evidence: [], actions: [],
+    permissions: { can_publish_artifacts: false, can_propose_actions: false,
+      can_sync_external_feedback: false, can_decide_work_orders: false,
+      can_execute_work_orders: false, can_decide_commands: false, can_execute_commands: false },
+    work_order_snapshot: item.task_type === "external_work_order" ? {
+      work_order_id: appointmentId, revision: 1, title: item.title, summary: item.summary,
+      status: "open", priority: "normal", assignee: "凤阳维修组", scheduled_at: now,
+      work_order_type: "general", location: "凤阳核验点", scenario_code: null,
+      origin: "system_data", updated_at: now
+    } : null
+  }));
+  const runtime = {
+    availability: "not_configured", source: "none", scenario_availability: "not_configured",
+    artifact_availability: "not_configured", schedule_availability: "not_configured",
+    work_order_availability: "not_configured", alert_availability: "not_configured",
+    generated_at: now, conditions: [], alerts: [], scenarios: [], latest_analysis: null, work_orders: []
+  };
+  await mockWorkbenchContext(page, runtime);
+  await mockAgentApi(page);
+  await page.route("https://tjwater-api.invalid/api/v1/workbench/sync-snapshot", (route) => route.fulfill({ json: {
+    schema: "workbench-sync-snapshot@1", event_cursor: 0, runtime,
+    tasks: summaries, notifications: [], generated_at: now
+  } }));
+  await page.route("https://tjwater-api.invalid/api/v1/operational-tasks/*", (route) => {
+    const taskId = new URL(route.request().url()).pathname.split("/").at(-1);
+    const task = tasks.find((item) => item.task_id === taskId);
+    return route.fulfill({ status: task ? 200 : 404, json: task ?? {} });
+  });
+
+  await page.goto("/");
+  await page.getByRole("button", { name: "工况任务", exact: true }).click();
+  const panel = page.getByRole("region", { name: "工况任务", exact: true });
+  await panel.getByRole("button", { name: "展开工况任务" }).click();
+  await panel.getByRole("button", { name: /调查任务/ }).click();
+  await panel.getByText(summary.title, { exact: true }).first().click();
+  await expect(panel.getByTestId("scheduled-condition-detail-scroll")).toContainText(summary.summary);
+  await testInfo.attach("investigation-loaded", { body: await panel.screenshot(), contentType: "image/png" });
+
+  await panel.getByRole("button", { name: /预约任务/ }).click();
+  await panel.getByText(appointment.title, { exact: true }).first().click();
+  const detail = panel.getByTestId("scheduled-condition-detail-scroll");
+  await expect(detail).toContainText("核对预约任务详情");
+  await expect(detail).toContainText("凤阳维修组");
+  await expect(detail).toContainText("凤阳核验点");
+  await testInfo.attach("appointment-loaded", { body: await panel.screenshot(), contentType: "image/png" });
+});