Harden embed live refresh with reconnect backoff and poll fallback.

Document Nginx SSE proxy settings for long-lived live streams.

Co-authored-by: Cursor <cursoragent@cursor.com>

部署文档.md

@@ -177,6 +177,24 @@ bash /opt/crypto_okx/deploy/manage.sh   # 选 2
 - **页面打不开**:`pm2 status` / `pm2 logs crypto_okx --lines 50`
 - **OKX 失败**:先确认 SOCKS `ss -lntp | grep 1080`,再 `curl --proxy socks5h://...`
 - **脚本 `pipefail` 报错**(Windows 编辑过):`sed -i 's/\r$//' deploy/*.sh deploy/lib/*.sh`
+- **几分钟后资金/行情不自动刷新**:embed 壳靠 SSE(`/api/instance/live/stream`).若前面有 Nginx,需关闭缓冲并拉长超时,例如:
+
+```nginx
+location / {
+    proxy_pass http://127.0.0.1:5004;
+    proxy_http_version 1.1;
+    proxy_set_header Connection "";
+    proxy_buffering off;
+    proxy_read_timeout 3600s;
+    proxy_send_timeout 3600s;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+}
+```
+
+改完后 `nginx -t && systemctl reload nginx`,浏览器强刷.前端另有断开重连与轮询兜底.
 
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