现金冻结修复：price_monitor不再重算cash

根因：price_monitor每2分钟用av+fz重算cash，
但av/fz是旧数据(含法拉电子卖出前冻结)，
覆盖了Dad交易截图后的正确现金92,679。

修复：
1. price_monitor只更新market_value，不碰cash
2. cash设回正确值92,678.85（含法拉电子+18,920）
3. 加cash_history追踪每次修改

data/portfolio.json

@@ -649,15 +649,15 @@
       "_currency": "CNY"
     }
   ],
-  "cash": 113240.25,
+  "cash": 92678.85,
   "total_market_value": 835552.6,
-  "total_assets": 948792.85,
+  "total_assets": 928231.45,
   "total_pl": 0,
-  "position_pct": 88.06,
-  "updated_at": "2026-06-29 22:03",
+  "position_pct": 90.02,
+  "updated_at": "2026-06-29 22:23:47",
   "source": "/home/hmo/stocks/holding.xls",
   "frozen_cash": 39481.4,
-  "available_cash": 73758.85,
+  "available_cash": 92678.85,
   "frozen": 39481.4,
   "total_cash": 132145.6,
   "cash_updated_at": "2026-06-29 12:34",
@@ -672,11 +672,20 @@
       "timestamp": "2026-06-29 10:43"
     }
   ],
-  "total_mv": 855311.0,
+  "total_mv": 835552.6,
   "note": "cash fixed from screenshot 6/29, prices=CNY",
   "currency": "CNY",
   "last_verified_at": "2026-06-29 22:20",
   "_total_mv": 835552.6,
   "_total_cash": 113240.25,
-  "_total_assets": 948792.85
+  "_total_assets": 948792.85,
+  "cash_history": [
+    {
+      "time": "2026-06-29 22:23:47",
+      "cash": 92678.85,
+      "frozen": 39481.4,
+      "source": "manual:post-法拉电子-sell-100shares@189.2",
+      "formula": "初始可用73758.85+法拉电子18920"
+    }
+  ]
 }

price_monitor.py

@@ -199,32 +199,22 @@ def refresh_data_prices():
         json.dump(wl, open(WATCHLIST_PATH, 'w'), ensure_ascii=False, indent=2)
 
     # --- 汇总值重算（2026-06-29 bugfix: 之前price_monitor只更新个股价，不更新汇总）---
-    # total_market_value / total_assets / cash / position_pct 来自import_holding_xls快照
-    # 价格更新后必须同步刷新汇总，否则报告使用过期汇总 → 现金/资产/仓位全错
     try:
         live_market_value = sum(
             h.get('shares', 0) * h.get('price', 0)
             for h in pf.get('holdings', [])
         )
-        # 现金：优先用经过Dad截图确认的可用+冻结字段
-        # 2026-06-29 bugfix: 之前从strategy_staleness_report读现金（循环依赖→值被污染）
-        # 正确公式: 总现金 = 可用现金(截图确认) + 冻结资金(截图确认)
-        av = pf.get('available_cash', pf.get('_available_cash', 0))
-        fz = pf.get('frozen_cash', pf.get('_frozen_cash', 0))
-        if av > 0 or fz > 0:
-            total_cash = round(av + fz, 2)
-        else:
-            # fallback: 从 stale_report 读
-            try:
-                sr = json.load(open('/home/hmo/web-dashboard/data/strategy_staleness_report.json'))
-                total_cash = sr.get('portfolio', {}).get('cash', 0)
-            except:
-                total_cash = pf.get('cash', 0)
         
-        old_cash = pf.get('cash', 0)
-        if abs(old_cash - total_cash) > 0.01:
-            pf['cash'] = total_cash
+        # 现金：绝不重算。保留上次的值（来自截图/导入/手动修改）。
+        # 2026-06-29 bugfix v2: 之前price_monitor用available_cash+frozen_cash重算现金，
+        # 但截图确认的9.2万被旧冻结数据(3.9万)覆盖=113k，导致cash来回跳
+        # 修正：price_monitor只更新market_value，不碰cash
         
+        old_mv = pf.get('total_mv', 0)
+        if abs(old_mv - live_market_value) > 0.01:
+            pf['total_mv'] = round(live_market_value, 2)
+        
+        total_cash = pf.get('cash', 0)  # 保留上次的现金值，不重算
         pf['total_assets'] = round(live_market_value + total_cash, 2)
         if pf['total_assets'] > 0:
             pf['position_pct'] = round(live_market_value / pf['total_assets'] * 100, 2)