fix(chat): honor ui_lang on WebSocket turns; ops NE display by host_name

Resolve runtime language from ui_lang and chat.send lang instead of hardcoding zh.
Align generalist/ops prompts with user language and require host_name (not ne_id) in ops outputs.

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

interfaces/admin/static/chat.js

@@ -4134,6 +4134,7 @@ async function renderChatUi() {
           memory_mode: String(memoryMode || "default"),
           execution_mode: String(executionMode || "agent"),
           plan_agent_version: outboundPlanAgentVersion(),
+          lang: currentLang === "en" ? "en" : "zh",
         },
       };
       this.ws.send(JSON.stringify(req));