CoWIN 6087 历史持久化 + 跑道曲线聚合 + 模型区间修复 + HKO 曲线对调 + 毛玻璃加载层

- weather_sources: CoWIN 1min 观测写入 official_intraday_observations_store
- country_networks: cowin_obs 源从 DB 回读 1min 历史，不复用 VHHH METAR
- analysis_service: 跑道实测 36h 历史按跑道分组，透传至前端
- scan_terminal_city_row: model_cluster_sources fallback 修复 + runway_plate_history
- 前端: CoWIN 6087 升级为主轴实线，HKO 退为虚线，VHHH METAR 轻虚线
- 前端: Loading 升级为毛玻璃全卡蒙层

src/data_collection/country_networks.py

@@ -1201,12 +1201,29 @@ def build_country_network_snapshot(city: str, raw: Dict[str, Any]) -> Dict[str,
         "stale_row_count": stale_count,
         "unknown_timing_count": unknown_count,
     }
+    airport_primary_today_obs = ((raw.get("metar") or {}).get("today_obs") or [])
+    if airport_primary.get("source_code") == "cowin_obs":
+        try:
+            from src.database.runtime_state import OfficialIntradayObservationRepository
+            repo = OfficialIntradayObservationRepository()
+            local_now = datetime.now(timezone.utc) + timedelta(seconds=city_offset or 0)
+            local_date_str = local_now.strftime("%Y-%m-%d")
+            points = repo.load_points(
+                source_code="cowin_obs",
+                station_code=airport_primary.get("station_code") or "6087",
+                target_date=local_date_str,
+            )
+            if points:
+                airport_primary_today_obs = [{"time": p["time"], "temp": p["temp"]} for p in points]
+        except Exception:
+            pass
+
     return {
         "provider_code": provider.provider_code,
         "provider_label": provider.provider_label,
         "settlement_station": metadata,
         "airport_primary_current": airport_primary,
-        "airport_primary_today_obs": ((raw.get("metar") or {}).get("today_obs") or []),
+        "airport_primary_today_obs": airport_primary_today_obs,
         "official_nearby": official_nearby,
         "official_network_source": status.get("provider_code"),
         "official_network_status": status,