refactor(handler): 移除TYPE_CHECKING并直接导入Bot类

简化类型注解，直接导入Bot类而非使用TYPE_CHECKING条件导入，提高代码可读性和维护性

core/handlers/event_handler.py

@@ -6,10 +6,9 @@
 """
 import inspect
 from abc import ABC, abstractmethod
-from typing import Any, Callable, Dict, List, Optional, Tuple, TYPE_CHECKING
+from typing import Any, Callable, Dict, List, Optional, Tuple
 
-if TYPE_CHECKING:
-    from ..bot import Bot
+from ..bot import Bot
 from ..config_loader import global_config
 from ..permission import Permission
 from ..utils.executor import run_in_thread_pool
@@ -23,7 +22,7 @@ class BaseHandler(ABC):
         self.handlers: List[Dict[str, Any]] = []
 
     @abstractmethod
-    async def handle(self, bot: "Bot", event: Any):
+    async def handle(self, bot: Bot, event: Any):
         """
         处理事件
         """
@@ -32,7 +31,7 @@ class BaseHandler(ABC):
     async def _run_handler(
         self,
         func: Callable,
-        bot: "Bot",
+        bot: Bot,
         event: Any,
         args: Optional[List[str]] = None,
         permission_granted: Optional[bool] = None
@@ -123,7 +122,7 @@ class MessageHandler(BaseHandler):
             return func
         return decorator
 
-    async def handle(self, bot: "Bot", event: Any):
+    async def handle(self, bot: Bot, event: Any):
         """
         处理消息事件，分发给命令处理器或通用消息处理器
         """