refactor: 重构配置模块

src/chat/utils/info_catcher.py

@@ -9,7 +9,6 @@ from typing import List
 class InfoCatcher:
     def __init__(self):
         self.chat_history = []  # 聊天历史，长度为三倍使用的上下文喵~
-        self.context_length = global_config.observation_context_size
         self.chat_history_in_thinking = []  # 思考期间的聊天内容喵~
         self.chat_history_after_response = []  # 回复后的聊天内容，长度为一倍上下文喵~
 
@@ -143,7 +142,7 @@ class InfoCatcher:
         messages_before = (
             db.messages.find({"chat_id": chat_id, "message_id": {"$lt": message_id}})
             .sort("time", -1)
-            .limit(self.context_length * 3)
+            .limit(global_config.chat.observation_context_size * 3)
         )  # 获取更多历史信息
 
         return list(messages_before)