修复货币数字错误和没有货币种类问题，修复UTC和本地时间混用，改用UTC

main.py

@@ -194,6 +194,9 @@ class MySQLStore:
             charset=self.cfg["charset"],
             autocommit=True,
         )
+        # Force session timestamps to UTC for NOW()/CURRENT_TIMESTAMP consistency.
+        with self.conn.cursor() as cursor:
+            cursor.execute("SET time_zone = '+00:00'")
 
     def close(self):
         if self.conn: