feat：拆分HFC组件，为插件做准备

src/chat/focus_chat/planners/action_manager.py

@@ -0,0 +1,72 @@
+from typing import List, Optional, Dict
+
+# 默认动作定义
+DEFAULT_ACTIONS = {"no_reply": "不操作，继续浏览", "reply": "表达想法，可以只包含文本、表情或两者都有"}
+
+
+class ActionManager:
+    """动作管理器：控制每次决策可以使用的动作"""
+
+    def __init__(self):
+        # 初始化为新的默认动作集
+        self._available_actions: Dict[str, str] = DEFAULT_ACTIONS.copy()
+        self._original_actions_backup: Optional[Dict[str, str]] = None
+
+    def get_available_actions(self) -> Dict[str, str]:
+        """获取当前可用的动作集"""
+        return self._available_actions.copy()  # 返回副本以防外部修改
+
+    def add_action(self, action_name: str, description: str) -> bool:
+        """
+        添加新的动作
+
+        参数:
+            action_name: 动作名称
+            description: 动作描述
+
+        返回:
+            bool: 是否添加成功
+        """
+        if action_name in self._available_actions:
+            return False
+        self._available_actions[action_name] = description
+        return True
+
+    def remove_action(self, action_name: str) -> bool:
+        """
+        移除指定动作
+
+        参数:
+            action_name: 动作名称
+
+        返回:
+            bool: 是否移除成功
+        """
+        if action_name not in self._available_actions:
+            return False
+        del self._available_actions[action_name]
+        return True
+
+    def temporarily_remove_actions(self, actions_to_remove: List[str]):
+        """
+        临时移除指定的动作，备份原始动作集。
+        如果已经有备份，则不重复备份。
+        """
+        if self._original_actions_backup is None:
+            self._original_actions_backup = self._available_actions.copy()
+
+        actions_actually_removed = []
+        for action_name in actions_to_remove:
+            if action_name in self._available_actions:
+                del self._available_actions[action_name]
+                actions_actually_removed.append(action_name)
+        # logger.debug(f"临时移除了动作: {actions_actually_removed}") # 可选日志
+
+    def restore_actions(self):
+        """
+        恢复之前备份的原始动作集。
+        """
+        if self._original_actions_backup is not None:
+            self._available_actions = self._original_actions_backup.copy()
+            self._original_actions_backup = None
+            # logger.debug("恢复了原始动作集") # 可选日志