feat: mo_data.py unified read layer (DB-first, JSON fallback) + cash_log table + batch JSON→DB migration (16 files)

strategy_tree.py

@@ -17,6 +17,7 @@ strategy_tree.py — 情景化多分支策略决策引擎
 
 import json, os, sys, re
 from datetime import datetime, date, timedelta
+from mo_data import read_portfolio, read_decisions, read_watchlist
 
 DECISIONS_PATH = "/home/hmo/web-dashboard/data/decisions.json"
 PORTFOLIO_PATH = "/home/hmo/web-dashboard/data/portfolio.json"
@@ -141,7 +142,7 @@ def evaluate_branches(code, scenario_id, price, shares, cost):
     返回: [{branch_id, action_type, action_detail, priority, applicable}]
     """
     try:
-        dec = json.load(open(DECISIONS_PATH))
+        dec = mo_data.read_decisions()
     except Exception:
         return []
     
@@ -237,7 +238,7 @@ def _check_branch_condition(branch, scenario_id, price, shares, cost):
 def record_branch_trigger(code, branch_id):
     """记录分支被触发了一次，用于自成长统计"""
     try:
-        dec = json.load(open(DECISIONS_PATH))
+        dec = mo_data.read_decisions()
         for e in dec.get("decisions", []):
             if e.get("code") == code:
                 st = e.setdefault("strategy_tree", {})
@@ -261,7 +262,7 @@ def prune_low_performance_branches(min_triggers=5, min_success_rate=0.3):
     被剪的分支移入 history 字段，不打删除（可追溯）
     """
     try:
-        dec = json.load(open(DECISIONS_PATH))
+        dec = mo_data.read_decisions()
     except Exception:
         return []
     
@@ -382,7 +383,7 @@ def init_default_branches(code, name, entry_low, entry_high, stop_loss, take_pro
 def check_portfolio_constraint(action_type, amount, cash_remain=None):
     """组合约束检查：现金够不够？仓位上限？"""
     try:
-        pf = json.load(open(PORTFOLIO_PATH))
+        pf = mo_data.read_portfolio()
     except Exception:
         return True, "无法读取组合"