feat(ops): enforce English-only replies and localize netx protocol labels

Append english_output_guard when lang=en, strengthen ops/generalist EN role prompts,
pass NETX_TOOL_LANG into netx tools, and map Chinese protocol buckets to English.

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

tests/test_netx_protocol_localize.py

@@ -0,0 +1,28 @@
+import unittest
+
+from runtime.tools.experts.network_ops import netx_tools as nt
+
+
+class NetxProtocolLocalizeTests(unittest.TestCase):
+    def test_localize_protocol_summary_to_en(self) -> None:
+        data = {
+            "protocol_summary": [
+                {"key": "其他", "count": 1},
+                {"key": "时钟", "count": 2},
+                {"key": "OTN/光", "count": 3},
+                {"key": "电源", "count": 4},
+                {"key": "IP/MPLS", "count": 5},
+            ]
+        }
+        out = nt._localize_netx_payload(dict(data), lang="en")
+        keys = [r["key"] for r in out["protocol_summary"]]
+        self.assertEqual(keys, ["Other", "Clock", "OTN/Optical", "Power", "IP/MPLS"])
+
+    def test_zh_payload_unchanged(self) -> None:
+        data = {"protocol_summary": [{"key": "其他", "count": 1}]}
+        out = nt._localize_netx_payload(dict(data), lang="zh")
+        self.assertEqual(out["protocol_summary"][0]["key"], "其他")
+
+
+if __name__ == "__main__":
+    unittest.main()