From 94471c90d8613e1c6d779d03d00171690a6c3202 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=B1=E6=BD=AE?= <zhuchaowe@users.noreply.github.com>
Date: Thu, 12 Mar 2026 16:57:44 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=BF=83=E8=B7=B3=E6=9C=BA?=
 =?UTF-8?q?=E5=88=B6?=
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---
 routes/chat.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/routes/chat.py b/routes/chat.py
index 06dd624..40d0f82 100644
--- a/routes/chat.py
+++ b/routes/chat.py
@@ -191,6 +191,8 @@ async def enhanced_generate_stream_response(
                 if all(task.done() for task in [preamble_task_handle, agent_task_handle]):
                     # 所有任务都完成了，退出循环
                     break
+                # 发送 SSE 心跳注释保持连接活跃，防止 nginx/客户端超时断开
+                yield ": heartbeat\n\n"
                 continue
 
         # 发送结束标记