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_history.json

@@ -94,7 +94,7 @@
       "date": "2026-06-29",
       "high": 432.0,
       "low": 411.0,
-      "close": 422.2
+      "close": 418.0
     }
   ],
   "00968": [
@@ -108,7 +108,7 @@
       "date": "2026-06-29",
       "high": 2.08,
       "low": 1.97,
-      "close": 2.04
+      "close": 2.01
     }
   ],
   "00981": [
@@ -120,9 +120,9 @@
     },
     {
       "date": "2026-06-29",
-      "high": 85.25,
+      "high": 85.8,
       "low": 79.05,
-      "close": 84.15
+      "close": 84.6
     }
   ],
   "01070": [
@@ -136,7 +136,7 @@
       "date": "2026-06-29",
       "high": 13.0,
       "low": 12.4,
-      "close": 12.9
+      "close": 13.0
     }
   ],
   "01088": [
@@ -150,7 +150,7 @@
       "date": "2026-06-29",
       "high": 41.48,
       "low": 40.0,
-      "close": 41.3
+      "close": 41.1
     }
   ],
   "01211": [
@@ -164,7 +164,7 @@
       "date": "2026-06-29",
       "high": 75.55,
       "low": 72.2,
-      "close": 73.35
+      "close": 72.75
     }
   ],
   "01478": [
@@ -178,7 +178,7 @@
       "date": "2026-06-29",
       "high": 7.17,
       "low": 6.6,
-      "close": 6.92
+      "close": 6.98
     }
   ],
   "01888": [
@@ -192,7 +192,7 @@
       "date": "2026-06-29",
       "high": 103.5,
       "low": 89.05,
-      "close": 96.55
+      "close": 96.3
     }
   ],
   "02202": [
@@ -220,7 +220,7 @@
       "date": "2026-06-29",
       "high": 52.45,
       "low": 50.0,
-      "close": 52.05
+      "close": 51.85
     }
   ],
   "02359": [
@@ -234,7 +234,7 @@
       "date": "2026-06-29",
       "high": 154.6,
       "low": 143.4,
-      "close": 153.8
+      "close": 151.7
     }
   ],
   "02388": [
@@ -247,8 +247,8 @@
     {
       "date": "2026-06-29",
       "high": 46.3,
-      "low": 43.42,
-      "close": 43.66
+      "low": 43.38,
+      "close": 43.78
     }
   ],
   "02628": [
@@ -262,7 +262,7 @@
       "date": "2026-06-29",
       "high": 28.56,
       "low": 26.7,
-      "close": 27.76
+      "close": 27.82
     }
   ],
   "06160": [
@@ -276,7 +276,7 @@
       "date": "2026-06-29",
       "high": 177.0,
       "low": 164.7,
-      "close": 175.8
+      "close": 175.0
     }
   ],
   "06869": [
@@ -290,7 +290,7 @@
       "date": "2026-06-29",
       "high": 286.8,
       "low": 227.2,
-      "close": 241.2
+      "close": 239.6
     }
   ],
   "09868": [
@@ -304,7 +304,7 @@
       "date": "2026-06-29",
       "high": 49.14,
       "low": 45.32,
-      "close": 47.5
+      "close": 47.54
     }
   ],
   "09988": [
@@ -318,7 +318,7 @@
       "date": "2026-06-29",
       "high": 95.45,
       "low": 88.65,
-      "close": 93.4
+      "close": 92.3
     }
   ],
   "300035": [