Solution Overview:
I needed a way to close the GLFW window from any part of my application. Initially, I tried calling glfwSetWindowShouldClose(window, GLFW_TRUE), but I wasn't sure how to get the correct window pointer into the other screen modules.

What I tried & why it fell short:

• The direct call made sense, but passing the window reference across modules felt cumbersome and error-prone.

What changed:

• I made the window static and public. This allowed global access without passing it around.

Result:
Now, I can simply call App::window from any screen and close the window cleanly, improving both readability and maintainability.