fix(agent): bound SCADA presentation continuations

src/product/operational-task-client.ts

@@ -410,6 +410,17 @@ export function scadaPresentationContinuation(error: unknown): string | null {
   return `Server尚未接受本轮调查结束：${error.message}\n请按返回设备补充publish_task_presentation监测图，必要时更新publish_task_report。保留目标设备与真实缺测说明，完成后再结束本轮。`;
 }
 
+/** Bound automatic extra model turns to the current response, preserving the Server gate. */
+export function createScadaPresentationContinuation() {
+  let attempts = 0;
+  return (error: unknown): string | null => {
+    const guidance = scadaPresentationContinuation(error);
+    if (!guidance || attempts >= 3) return null;
+    attempts++;
+    return guidance;
+  };
+}
+
 const parseJson = (text: string): unknown => {
   if (!text.trim()) return {};
   try {

src/routes/chatStreamRoute.ts

@@ -45,7 +45,7 @@ import {
   clearOperationalTaskLease,
   operationalTaskClient,
   releaseOperationalTaskCredential,
-  scadaPresentationContinuation,
+  createScadaPresentationContinuation,
 } from "../product/operational-task-client.js";
 import { type SessionTranscriptStore } from "../sessions/transcriptStore.js";
 import { type SessionUiStateStore } from "../sessions/uiStateStore.js";
@@ -692,6 +692,7 @@ export const registerChatStreamRoute = (
       let taskHeartbeatPromise: Promise<void> | undefined;
       let taskLeaseFailure: Error | undefined;
       let taskRunFinalized = false;
+      const continueScadaPresentation = createScadaPresentationContinuation();
       const stopTaskHeartbeat = async () => {
         taskHeartbeatActive = false;
         if (taskHeartbeat) clearInterval(taskHeartbeat);
@@ -819,7 +820,7 @@ export const registerChatStreamRoute = (
               if (task.lifecycle_status === "failed") throw new Error("Server rejected incomplete investigation artifacts");
               return true;
             } catch (error) {
-              const continuation = scadaPresentationContinuation(error);
+              const continuation = continueScadaPresentation(error);
               if (continuation) return continuation;
               if (error && typeof error === "object" && "code" in error && error.code === "PENDING_AGENT_MESSAGES") {
                 await messaging?.flush(binding.sessionId);