站群 Python 版已启动，但当前域名未匹配到站点

可能原因：

尚未在 .env 中配置正确的 MySQL 连接（库名 qunqunqun）；
当前访问域名（127.0.0.1:8088）不在 site.yuming 表中；
MySQL 服务未启动或网络不通。

请检查 .env 中的 DB_HOST / DB_USER / DB_PASSWORD / DB_NAME，并确认目标域名已写入 site 表的 yuming 字段。

错误信息：(1045, "Access denied for user 'CHANGE_ME'@'localhost' (using password: YES)")

Traceback (most recent call last):
  File "D:\py_wwwroot\py_zhanqun\web\sitectx.py", line 87, in resolve_current_site
    row = load_site_row(host)
          ^^^^^^^^^^^^^^^^^^^
  File "D:\py_wwwroot\py_zhanqun\web\sitectx.py", line 49, in load_site_row
    row = db.query_one(
             ^^^^^^^^^
  File "D:\py_wwwroot\py_zhanqun\web\db.py", line 45, in query_one
    conn = get_conn()
           ^^^^^^^^^^
  File "D:\py_wwwroot\py_zhanqun\web\db.py", line 27, in get_conn
    g.db = _connect()
           ^^^^^^^^^^
  File "D:\py_wwwroot\py_zhanqun\web\db.py", line 12, in _connect
    return pymysql.connect(
                   ^^^^^^^
  File "D:\BtSoft\python\python_python\Lib\site-packages\pymysql\connections.py", line 361, in __init__
    self.connect()
         ^^^^^^^
  File "D:\BtSoft\python\python_python\Lib\site-packages\pymysql\connections.py", line 669, in connect
    self._request_authentication()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\BtSoft\python\python_python\Lib\site-packages\pymysql\connections.py", line 957, in _request_authentication
    auth_packet = self._read_packet()
                       ^^^^^^^^^^^^
  File "D:\BtSoft\python\python_python\Lib\site-packages\pymysql\connections.py", line 775, in _read_packet
    packet.raise_for_error()
           ^^^^^^^^^^^^^^^
  File "D:\BtSoft\python\python_python\Lib\site-packages\pymysql\protocol.py", line 219, in raise_for_error
    err.raise_mysql_exception(self._data)
        ^^^^^^^^^^^^^^^^^^^^^
  File "D:\BtSoft\python\python_python\Lib\site-packages\pymysql\err.py", line 150, in raise_mysql_exception
    raise errorclass(errno, errval)
pymysql.err.OperationalError: (1045, "Access denied for user 'CHANGE_ME'@'localhost' (using password: YES)")