feat：复用jargon和expression的部分代码，代码层面合并，合并配置项

缓解bot重复学习自身表达的问题
缓解单字黑话推断时消耗过高的问题
修复count过高时推断过长的问题
移除表达方式学习强度配置

src/chat/brain_chat/brain_chat.py

@@ -16,7 +16,8 @@ from src.chat.brain_chat.brain_planner import BrainPlanner
 from src.chat.planner_actions.action_modifier import ActionModifier
 from src.chat.planner_actions.action_manager import ActionManager
 from src.chat.heart_flow.hfc_utils import CycleDetail
-from src.express.expression_learner import expression_learner_manager
+from src.bw_learner.expression_learner import expression_learner_manager
+from src.bw_learner.message_recorder import extract_and_distribute_messages
 from src.person_info.person_info import Person
 from src.plugin_system.base.component_types import EventType, ActionInfo
 from src.plugin_system.core import events_manager
@@ -252,7 +253,7 @@ class BrainChatting:
         # ReflectTracker Check
         # 在每次回复前检查一次上下文，看是否有反思问题得到了解答
         # -------------------------------------------------------------------------
-        from src.express.reflect_tracker import reflect_tracker_manager
+        from src.bw_learner.reflect_tracker import reflect_tracker_manager
 
         tracker = reflect_tracker_manager.get_tracker(self.stream_id)
         if tracker:
@@ -265,13 +266,15 @@ class BrainChatting:
         # Expression Reflection Check
         # 检查是否需要提问表达反思
         # -------------------------------------------------------------------------
-        from src.express.expression_reflector import expression_reflector_manager
+        from src.bw_learner.expression_reflector import expression_reflector_manager
 
         reflector = expression_reflector_manager.get_or_create_reflector(self.stream_id)
         asyncio.create_task(reflector.check_and_ask())
 
         async with global_prompt_manager.async_message_scope(self.chat_stream.context.get_template_name()):
-            asyncio.create_task(self.expression_learner.trigger_learning_for_chat())
+            # 通过 MessageRecorder 统一提取消息并分发给 expression_learner 和 jargon_miner
+            # 在 replyer 执行时触发，统一管理时间窗口，避免重复获取消息
+            asyncio.create_task(extract_and_distribute_messages(self.stream_id))
 
             cycle_timers, thinking_id = self.start_cycle()
             logger.info(f"{self.log_prefix} 开始第{self._cycle_counter}次思考")