From 9295899aeb6767a280bb76ada896666e7c1044fd Mon Sep 17 00:00:00 2001
From: "2569718930@qq.com" <2569718930@qq.com>
Date: Wed, 11 Mar 2026 12:22:06 +0800
Subject: [PATCH] feat: implement PolyWeather Web Map API, a FastAPI backend
 integrating weather data collection and analysis to support an interactive
 map.

---
 web/app.py | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/web/app.py b/web/app.py
index cc0e8aff..3978f317 100644
--- a/web/app.py
+++ b/web/app.py
@@ -809,12 +809,20 @@ def _build_city_detail_payload(
     # Mispricing anchor temperature:
     # use the highest value across all available model highs.
     anchor_temp = None
-    for raw_value in model_map.values():
+    anchor_model = None
+    for model_name, raw_value in model_map.items():
         value = _sf(raw_value)
         if value is None:
             continue
         if anchor_temp is None or value > anchor_temp:
             anchor_temp = value
+            anchor_model = str(model_name or "").strip() or None
+
+    anchor_temp_c = anchor_temp
+    temp_symbol = str(data.get("temp_symbol") or "")
+    if anchor_temp_c is not None and "F" in temp_symbol.upper():
+        anchor_temp_c = (anchor_temp_c - 32.0) * 5.0 / 9.0
+    anchor_settlement = wu_round(anchor_temp_c) if anchor_temp_c is not None else None
 
     primary_bucket = None
     if isinstance(distribution, list) and distribution:
@@ -859,6 +867,12 @@ def _build_city_detail_payload(
         fallback_sparkline=fallback_sparkline,
         forced_market_slug=market_slug,
     )
+    if isinstance(market_scan, dict):
+        market_scan["anchor_model"] = anchor_model
+        market_scan["anchor_high"] = anchor_temp
+        market_scan["anchor_settlement"] = anchor_settlement
+        # Keep legacy key for compatibility with old checks.
+        market_scan["open_meteo_settlement"] = anchor_settlement
     return {
         "city": data.get("name"),
         "fetched_at": data.get("updated_at"),