fix: preserve runtime settings and user config compatibility

app/db/oper/userconfig.py

@@ -1,9 +1,13 @@
-from typing import Any, Union, Dict, Optional
+from typing import Any, Union, Dict, Optional, List
+
+from sqlalchemy import select
+from sqlalchemy.orm import Session
 
 from app.db.base import DbOper
 from app.db.models.userconfig import UserConfig
 from app.schemas.types import UserConfigKey
 from app.foundation.singleton import Singleton
+from app.db.decorators import run_legacy_sync_query
 
 
 class UserConfigOper(DbOper, metaclass=Singleton):
@@ -16,9 +20,29 @@ class UserConfigOper(DbOper, metaclass=Singleton):
         """
         super().__init__()
         self.__USERCONF = {}
-        for item in UserConfig.list(self._db):
+        for item in self._list_configs():
             self.__set_config_cache(username=item.username, key=item.key, value=item.value)
 
+    def _with_sync_session(self, operation):
+        """在显式会话或兼容查询会话中执行只读操作。"""
+        if isinstance(self._db, Session):
+            return operation(self._db)
+        return run_legacy_sync_query(operation)
+
+    def _list_configs(self) -> List[UserConfig]:
+        """读取全部用户配置，避免把 None 会话传入已显式化的 Model。"""
+        return self._with_sync_session(
+            lambda session: list(session.execute(select(UserConfig)).scalars().all())
+        )
+
+    def _get_by_key(self, username: str, key: str) -> Optional[UserConfig]:
+        """按用户名和键读取配置，复用调用方事务或一次性兼容会话。"""
+        return self._with_sync_session(
+            lambda session: UserConfig.get_by_key(
+                db=session, username=username, key=key
+            )
+        )
+
     def set(self, username: str, key: Union[str, UserConfigKey], value: Any):
         """
         设置用户配置
@@ -28,7 +52,7 @@ class UserConfigOper(DbOper, metaclass=Singleton):
         # 更新内存
         self.__set_config_cache(username=username, key=key, value=value)
         # 写入数据库
-        conf = UserConfig.get_by_key(db=self._db, username=username, key=key)
+        conf = self._get_by_key(username=username, key=key)
         if conf:
             if value:
                 self._stage_update(conf, {"value": value})