diff --git a/frontend-web/src/open-canvas/components/ai-writing/AIWritingPanel.tsx b/frontend-web/src/open-canvas/components/ai-writing/AIWritingPanel.tsx
index 9439c133..e38984ed 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/AIWritingPanel.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/AIWritingPanel.tsx
@@ -91,7 +91,7 @@ export function AIWritingPanel({
   const { state, startWriting, submitIntervention, pauseWriting, resumeWriting, reset } = useAIWriting();
   const { historySession, isHistoryMode, openHistory, closeHistory } = useAIWritingHistory();
   const writingForm = useWritingFormOptional();
-  const { sessions, loading: sessionsLoading, refresh, rename, remove } = useAIWritingSessions();
+  const { sessions, loading: sessionsLoading, refresh, rename, remove, markBackground, clearBackground } = useAIWritingSessions();
   const { articleTypes, refresh: refreshArticleTypes } = useArticleTypes();
 
   useEffect(() => { refreshArticleTypes(); }, [refreshArticleTypes]);
@@ -207,24 +207,31 @@ export function AIWritingPanel({
   }, [closeHistory, reset]);
 
   // ── 后台挂起：把当前写作转后台，后端自动驱动到定稿（离页/刷新/切号不打断） ──
-  const handleBackgroundSuspend = useCallback(async () => {
+  // 与「多智能体会商」一致：点击后**立刻**回到初始页面，挂起请求 fire-and-forget；
+  // 历史下拉靠乐观标记马上显示「挂起中」，不等后端确认。
+  const handleBackgroundSuspend = useCallback(() => {
     const sid = state.sessionId;
     if (!sid) {
       toast.error('当前没有可挂起的写作会话');
       return;
     }
-    try {
-      await suspendAIWritingToBackground(sid);
-    } catch (e) {
-      toast.error(e instanceof Error ? e.message : '后台挂起失败');
-      return;
-    }
-    toast.success('已转入后台自动完成，稍后可在「历史记录」查看进度与结果');
-    // reset() 会 stop 客户端 SSE 订阅并回到 idle —— 后端驱动器接管续跑，不冲突。
+    // 1) 立刻：乐观标记 + 重置 UI 回到 idle（reset() 会 stop 客户端 SSE 订阅，
+    //    后端驱动器接管续跑，不冲突）。
+    markBackground(sid);
     reset();
-    // 刷新历史列表，让「挂起中」徽标立刻出现。
-    refresh();
-  }, [state.sessionId, reset, refresh]);
+    toast.success('已转入后台自动完成，稍后可在「历史记录」查看进度与结果');
+    // 2) 后台：fire-and-forget 通知后端拉起驱动；完成后刷新真实状态并清除乐观标记。
+    void (async () => {
+      try {
+        await suspendAIWritingToBackground(sid);
+      } catch (e) {
+        toast.error(e instanceof Error ? e.message : '后台挂起失败');
+      } finally {
+        await refresh();
+        clearBackground(sid);
+      }
+    })();
+  }, [state.sessionId, reset, refresh, markBackground, clearBackground]);
 
   // 离页 / 刷新 / 关标签页时，若写作仍在进行中则自动转后台（与圆桌「自动挂起」一致）。
   // 用 ref 持有最新的「是否在跑 + 会话 id」，让卸载/卸载前回调读到即时值。
diff --git a/frontend-web/src/open-canvas/hooks/useAIWritingSessions.ts b/frontend-web/src/open-canvas/hooks/useAIWritingSessions.ts
index ffa7ae6d..ac98220f 100644
--- a/frontend-web/src/open-canvas/hooks/useAIWritingSessions.ts
+++ b/frontend-web/src/open-canvas/hooks/useAIWritingSessions.ts
@@ -1,4 +1,4 @@
-import { useCallback, useState } from 'react';
+import { useCallback, useMemo, useState } from 'react';
 
 import {
   listAIWritingSessions,
@@ -10,6 +10,27 @@ import type { AIWritingSessionSummary } from '../api/ai-writing-sessions';
 export function useAIWritingSessions() {
   const [sessions, setSessions] = useState<AIWritingSessionSummary[]>([]);
   const [loading, setLoading] = useState(false);
+  // 「后台挂起」乐观标记：点击挂起后立刻让历史下拉显示「挂起中」，不必等后端确认。
+  // 后端状态（status='background'）刷新到位后由调用方 clearBackground 清除。
+  const [pendingBackground, setPendingBackground] = useState<Set<string>>(() => new Set());
+
+  const markBackground = useCallback((id: string) => {
+    setPendingBackground((prev) => {
+      if (prev.has(id)) return prev;
+      const next = new Set(prev);
+      next.add(id);
+      return next;
+    });
+  }, []);
+
+  const clearBackground = useCallback((id: string) => {
+    setPendingBackground((prev) => {
+      if (!prev.has(id)) return prev;
+      const next = new Set(prev);
+      next.delete(id);
+      return next;
+    });
+  }, []);
 
   const refresh = useCallback(async () => {
     setLoading(true);
@@ -41,5 +62,18 @@ export function useAIWritingSessions() {
     }
   }, []);
 
-  return { sessions, loading, refresh, rename, remove };
+  // 把乐观「挂起中」标记叠加到真实列表上：已在列表里的会话立刻显示 background。
+  const displaySessions = useMemo(
+    () =>
+      pendingBackground.size === 0
+        ? sessions
+        : sessions.map((s) =>
+            pendingBackground.has(s.id) && s.status !== 'done'
+              ? { ...s, status: 'background' }
+              : s,
+          ),
+    [sessions, pendingBackground],
+  );
+
+  return { sessions: displaySessions, loading, refresh, rename, remove, markBackground, clearBackground };
 }