DB港股价格+成本修复回HKD原值

笑笑重构把HK股的价格和成本都转CNY写入DB。
price_monitor同时改了新逻辑要写HKD，但DB已经是CNY，
两个方向打架导致建滔(-2.5%实际浮亏)被算成-15.5%。

修复：
  DB holdings表8只HK股的price和cost从CNY转回HKD
  currency改回HKD
  现金修正为132,121.93（Dad 7/3截图确认）
  总资产=957,656.13 仓位=86.2%

data/price_history.json

@@ -25,8 +25,8 @@
     {
       "date": "2026-07-03",
       "high": 1215.52,
-      "low": 1188.0,
-      "close": 1188.7
+      "low": 1185.0,
+      "close": 1195.45
     }
   ],
   "02202": [
@@ -61,8 +61,8 @@
     {
       "date": "2026-07-03",
       "high": 50.2,
-      "low": 48.4,
-      "close": 48.44
+      "low": 48.31,
+      "close": 49.06
     }
   ],
   "02359": [
@@ -118,7 +118,7 @@
       "date": "2026-07-03",
       "high": 502.0,
       "low": 444.55,
-      "close": 494.57
+      "close": 482.68
     }
   ],
   "06160": [
@@ -154,7 +154,7 @@
       "date": "2026-07-03",
       "high": 687.04,
       "low": 633.01,
-      "close": 646.83
+      "close": 644.5
     }
   ],
   "09868": [
@@ -196,7 +196,7 @@
       "date": "2026-07-03",
       "high": 757.88,
       "low": 713.0,
-      "close": 733.9
+      "close": 738.2
     }
   ],
   "300124": [
@@ -210,7 +210,7 @@
       "date": "2026-07-03",
       "high": 74.63,
       "low": 67.31,
-      "close": 73.13
+      "close": 72.22
     }
   ],
   "000657": [
@@ -224,7 +224,7 @@
       "date": "2026-07-03",
       "high": 101.5,
       "low": 87.88,
-      "close": 91.78
+      "close": 90.33
     }
   ],
   "000711": [
@@ -252,7 +252,7 @@
       "date": "2026-07-03",
       "high": 892.1,
       "low": 795.0,
-      "close": 887.87
+      "close": 882.5
     }
   ],
   "002594": [
@@ -264,9 +264,9 @@
     },
     {
       "date": "2026-07-03",
-      "high": 87.28,
+      "high": 88.78,
       "low": 81.9,
-      "close": 86.45
+      "close": 88.72
     }
   ],
   "00700": [
@@ -334,7 +334,7 @@
       "date": "2026-07-03",
       "high": 646.85,
       "low": 574.1,
-      "close": 635.0
+      "close": 620.31
     }
   ]
 }