fix: price_monitor.py 连环bug - 缺失import json + 元组解包不匹配

scripts/price_monitor.py

@@ -4,9 +4,7 @@
 每次运行时一次性刷新所有持仓+自选股的实时价。
 """
 import urllib.request
-import os
-import sys
-import time
+import os, sys, time, json
 import sqlite3
 from datetime import datetime
 
@@ -350,7 +348,7 @@ def run_once(round_label=""):
         price_info = prices.get(code)
         if not price_info:
             continue
-        price, _ = price_info
+        price, _, _ = price_info
         if price == 0:
             continue
 
@@ -430,11 +428,11 @@ def run_once(round_label=""):
         price_info = prices.get(code)
         if not price_info:
             continue
-        price, _ = price_info
+        price, _, _ = price_info
         if price == 0:
             continue
 
-        # 从 decisions.json 中读取 analysis 的买入区
+        # 从 decisions (DB holding_strategies) 中读取 analysis 的买入区
         entry_low = d.get("entry_low", 0)
         entry_high = d.get("entry_high", 0)
         if not entry_low or not entry_high:
@@ -486,7 +484,7 @@ def run_once(round_label=""):
         state[code]["__buy_zone"] = in_buy_zone
         state_updated = True
 
-    # 如果有重评过的股票，更新 decisions.json
+    # 如果有重评过的股票，更新 DB holding_strategies（此前写入 decisions.json，已废弃）
     if reassesed_codes and HAS_REASSESS:
         try:
             # 重新 regenerate_all 只针对受影响的股票效率太低