修复代码格式和文件名大小写问题

src/mais4u/mais4u_chat/screen_manager.py

@@ -1,14 +1,15 @@
 class ScreenManager:
     def __init__(self):
         self.now_screen = str()
-        
-    def set_screen(self,screen_str:str):
+
+    def set_screen(self, screen_str: str):
         self.now_screen = screen_str
-        
+
     def get_screen(self):
         return self.now_screen
-    
+
     def get_screen_str(self):
         return f"你可以看见面前的屏幕，目前屏幕的内容是:现在千石可乐在和你一起直播，这是他正在操作的屏幕内容：{self.now_screen}"
 
-screen_manager = ScreenManager()
+
+screen_manager = ScreenManager()