Clarify NMC labels as regional observations

tests/test_country_networks.py

@@ -62,7 +62,7 @@ def test_china_provider_prefers_nmc_rows_when_available():
         },
         "nmc_official_nearby": [
             {
-                "name": "浦东 (NMC)",
+                "name": "浦东区域实况 (NMC)",
                 "icao": "atcMf",
                 "lat": 31.14,
                 "lon": 121.80,

tests/test_nmc_sources.py

@@ -95,5 +95,6 @@ def test_fetch_nmc_official_nearby_returns_normalized_row():
     assert len(rows) == 1
     assert rows[0]["source"] == "nmc"
     assert rows[0]["temp"] == 17.9
-    assert rows[0]["name"] == "浦东 (NMC)"
+    assert rows[0]["name"] == "浦东区域实况 (NMC)"
+    assert rows[0]["station_label"] == "浦东区域实况 (NMC)"
     assert rows[0]["lat"] == 31.1434