fix(ops): English replies from English prompts and ROLE_SYSTEM.en

Detect language from user message before UI hint, load ops ROLE_SYSTEM.en.md when en, and wire user_text through WS/HTTP/worker paths.

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

tests/test_ops_role_system_en.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from runtime.agent_context.loader import build_role_system_context
+
+
+def test_ops_role_system_en_prefers_localized_file() -> None:
+    zh = build_role_system_context("ops", lang="zh")
+    en = build_role_system_context("ops", lang="en")
+    assert "运维专家" in zh or "oclaw智能运维" in zh
+    assert "ops specialist" in en.lower()
+    assert "reply entirely in the user's language" in en.lower()
+    assert "运维专家" not in en