fix: 修复外部因素数据源 - 北向资金改为南向资金，修复P0-P7全部外部因素

- P0资金面：DB数据过期时用麦蕊API获取资金流向
- P1市场情绪：去掉turnover字段依赖（DB无此字段）
- P2南向资金：北向实时数据已停公布，改用南向资金(港股通)替代
- P3美股：用腾讯财经API替代失效的AKShare接口
- P4大宗商品：用腾讯财经API替代，修复var_name解析
- P7汇率：用新浪财经API替代失效的AKShare接口
- 修复评分详情API技术得分硬编码问题
- 前端传入tech_score参数确保明细与列表分数一致

stock-html/services/fund_flow_analyzer.py

@@ -73,10 +73,105 @@ def get_fund_flow_history(stock_code, days=10):
         put_db(conn)
 
 
+def _get_fund_flow_from_mairui(stock_code, days=10):
+    """从麦蕊智数API获取资金流向数据，转换为与DB记录相同的格式。
+
+    API: https://api.mairuiapi.com/hsstock/history/transaction/{code}/{licence}?lt={n}
+    字段: zmbtdcje=主买特大单, zmbddcje=主买大单, zmbzdcje=主买中单, zmbxdcje=主买小单
+          zmstdcje=主卖特大单, zmsddcje=主卖大单, zmszdcje=主卖中单, zmsxdcje=主卖小单
+    """
+    try:
+        import requests
+        from config import Config
+        LICENCE = Config.MAIRUI_LICENCE or "5352ED2F-94E5-4E96-8B7F-B57BA75284E3"
+        url = f"https://api.mairuiapi.com/hsstock/history/transaction/{stock_code}/{LICENCE}?lt={days}"
+        resp = requests.get(url, timeout=10)
+        if resp.status_code != 200:
+            logger.warning(f"麦蕊资金流向API返回{resp.status_code}")
+            return []
+
+        data = resp.json()
+        if not data or not isinstance(data, list):
+            return []
+
+        records = []
+        for item in data:
+            # 主买总额 = 特大单+大单+中单+小单
+            buy_total = (
+                float(item.get('zmbtdcje', 0) or 0) +
+                float(item.get('zmbddcje', 0) or 0) +
+                float(item.get('zmbzdcje', 0) or 0) +
+                float(item.get('zmbxdcje', 0) or 0)
+            )
+            # 主卖总额
+            sell_total = (
+                float(item.get('zmstdcje', 0) or 0) +
+                float(item.get('zmsddcje', 0) or 0) +
+                float(item.get('zmszdcje', 0) or 0) +
+                float(item.get('zmsxdcje', 0) or 0)
+            )
+            # 主力净流入 = (特大单+大单)买 - (特大单+大单)卖
+            main_buy = float(item.get('zmbtdcje', 0) or 0) + float(item.get('zmbddcje', 0) or 0)
+            main_sell = float(item.get('zmstdcje', 0) or 0) + float(item.get('zmsddcje', 0) or 0)
+            main_net = main_buy - main_sell
+
+            # 超大单净流入
+            super_net = float(item.get('zmbtdcje', 0) or 0) - float(item.get('zmstdcje', 0) or 0)
+
+            # 总成交额
+            total_amount = buy_total + sell_total
+            main_net_pct = round(main_net / total_amount * 100, 2) if total_amount > 0 else 0
+            super_net_pct = round(super_net / total_amount * 100, 2) if total_amount > 0 else 0
+
+            # 大单净流入
+            big_net = float(item.get('zmbddcje', 0) or 0) - float(item.get('zmsddcje', 0) or 0)
+            big_net_pct = round(big_net / total_amount * 100, 2) if total_amount > 0 else 0
+
+            # 中单净流入
+            mid_net = float(item.get('zmbzdcje', 0) or 0) - float(item.get('zmszdcje', 0) or 0)
+            mid_net_pct = round(mid_net / total_amount * 100, 2) if total_amount > 0 else 0
+
+            # 小单净流入
+            small_net = float(item.get('zmbxdcje', 0) or 0) - float(item.get('zmsxdcje', 0) or 0)
+            small_net_pct = round(small_net / total_amount * 100, 2) if total_amount > 0 else 0
+
+            # 日期解析
+            t_str = str(item.get('t', ''))
+            date_str = t_str[:10] if t_str else ''
+
+            records.append({
+                'date': date_str,
+                'close_price': 0,
+                'change_pct': 0,
+                'main_net_inflow': round(main_net, 2),
+                'main_net_inflow_pct': main_net_pct,
+                'super_net_inflow': round(super_net, 2),
+                'super_net_inflow_pct': super_net_pct,
+                'big_net_inflow': round(big_net, 2),
+                'big_net_inflow_pct': big_net_pct,
+                'mid_net_inflow': round(mid_net, 2),
+                'mid_net_inflow_pct': mid_net_pct,
+                'small_net_inflow': round(small_net, 2),
+                'small_net_inflow_pct': small_net_pct,
+            })
+
+        # 按日期升序排列
+        records.sort(key=lambda x: x['date'])
+        logger.info(f"麦蕊API获取{stock_code}资金流向{len(records)}条")
+        return records
+    except Exception as e:
+        logger.warning(f"麦蕊资金流向API失败({stock_code}): {e}")
+        return []
+
+
 def analyze_fund_flow(stock_code, days=5):
     """
     分析主力资金流向，返回资金面评分和信号
 
+    数据源优先级：
+    1. DB stock_fund_flow_history 表（有最新数据时）
+    2. 麦蕊智数API hsstock/history/transaction（DB数据过期时补充）
+
     参数:
         stock_code: 股票代码
         days: 分析最近几天的资金流向
@@ -91,6 +186,28 @@ def analyze_fund_flow(stock_code, days=5):
         }
     """
     records = get_fund_flow_history(stock_code, days=days + 5)
+
+    # 检查DB数据是否足够新（最近3天内有数据）
+    use_mairui = False
+    if len(records) < 2:
+        use_mairui = True
+    else:
+        from datetime import date
+        latest_date = records[-1].get('date', '')
+        if latest_date:
+            try:
+                latest = datetime.strptime(latest_date, '%Y-%m-%d').date()
+                if (date.today() - latest).days > 5:
+                    use_mairui = True
+            except ValueError:
+                use_mairui = True
+
+    if use_mairui:
+        # 用麦蕊API获取资金流向数据
+        mairui_records = _get_fund_flow_from_mairui(stock_code, days + 5)
+        if mairui_records:
+            records = mairui_records
+
     if len(records) < 2:
         return {
             'score': 0,