issue: /api/chat/completions hangs indefinitely behind IIS/ARR proxy after upgrading from 0.9.2 to 0.9.3

Open WebUI 通过 IIS/ARR 反向代理访问时, /api/chat/completions 请求挂起,通常是因为 WebSocket 连接建立失败(例如 ENABLE_WEBSOCKET=true 但代理未正确传递 WebSocket 握手),导致前端回退到 SSE 流式传输,而 AR

![[testing] making network tests more reliable](https://www.chat-gpts.plus/wp-content/uploads/2026/07/12061-08a35669-768x403.jpg)






