CNY币种统一修复 — decisions.json所有价格字段统一CNY

问题：港股在decisions.json存HKD、portfolio.json存CNY，
报告交叉读取导致建滔积层板止损判断错位(CNY价vs HKD止损)。
修复：
price_monitor.refresh_data_prices() 每次拉价后，
对港股5位代码的全部价格字段(price/stop_loss/take_profit等)
及嵌套analysis/trigger字段，统一xHK_RATE→CNY
保证所有文件价格口径一致

data/price_events.json

@@ -5679,6 +5679,56 @@
       "event_label": "买入区间",
       "timestamp": "2026-06-29T15:10:52.129972",
       "date": "2026-06-29"
+    },
+    {
+      "code": "00700",
+      "name": "腾讯控股",
+      "event_type": "entry_zone",
+      "price": 417.8,
+      "trigger_value": "0~424.77",
+      "event_label": "止盈区间",
+      "timestamp": "2026-06-29T16:20:33.343007",
+      "date": "2026-06-29"
+    },
+    {
+      "code": "02202",
+      "name": "万科企业",
+      "event_type": "entry_zone",
+      "price": 2.22,
+      "trigger_value": "0~2.32",
+      "event_label": "止盈区间",
+      "timestamp": "2026-06-29T16:20:34.698897",
+      "date": "2026-06-29"
+    },
+    {
+      "code": "02628",
+      "name": "中国人寿",
+      "event_type": "entry_zone",
+      "price": 27.8,
+      "trigger_value": "27.38~27.99",
+      "event_label": "买入区间",
+      "timestamp": "2026-06-29T16:20:36.185068",
+      "date": "2026-06-29"
+    },
+    {
+      "code": "688411",
+      "name": "海博思创",
+      "event_type": "entry_zone",
+      "price": 286.0,
+      "trigger_value": "0~298.23",
+      "event_label": "止盈区间",
+      "timestamp": "2026-06-29T16:20:37.458219",
+      "date": "2026-06-29"
+    },
+    {
+      "code": "688639",
+      "name": "华恒生物",
+      "event_type": "entry_zone",
+      "price": 16.63,
+      "trigger_value": "0~17.74",
+      "event_label": "止盈区间",
+      "timestamp": "2026-06-29T16:20:38.352180",
+      "date": "2026-06-29"
     }
   ]
 }