为所有函数和类添加中文注释文档字符串

app/rendering/window_display.py

@@ -6,16 +6,20 @@ WINDOW_NAME = "Android Camera (WebRTC)"
 
 
 def show_frame(image, window_name: str = WINDOW_NAME) -> None:
+    """在OpenCV窗口中显示图像帧"""
     cv2.imshow(window_name, image)
 
 
 def wait_key(delay_ms: int = 1) -> int:
+    """等待按键并返回ASCII码"""
     return cv2.waitKey(delay_ms) & 0xFF
 
 
 def is_esc_pressed() -> bool:
+    """检测ESC键是否被按下"""
     return wait_key(1) == 27
 
 
 def close_window() -> None:
+    """关闭所有OpenCV窗口"""
     cv2.destroyAllWindows()