feat：进一步合并normal和focus模式，移除interest_dict（附带其他合理性修改）

src/plugin_system/base/base_action.py

@@ -33,7 +33,6 @@ class BaseAction(ABC):
         thinking_id: str,
         chat_stream=None,
         log_prefix: str = "",
-        shutting_down: bool = False,
         plugin_config: dict = None,
         **kwargs,
     ):
@@ -59,7 +58,6 @@ class BaseAction(ABC):
         self.cycle_timers = cycle_timers
         self.thinking_id = thinking_id
         self.log_prefix = log_prefix
-        self.shutting_down = shutting_down
 
         # 保存插件配置
         self.plugin_config = plugin_config or {}