Resize window when using SDL/display_screen

Using `display_screen` on a `1920x1080` display opens a window taller than the display itself. Resizing the window is also disabled. This is on Ubuntu `21.10`.

Is there any way to scale or adjust the DPI of the SDL window? Or maybe disable HiDPI if it's enabled by default? Looking through the repo I couldn't find anything. Also usual environment flags I've been using in the past with other applications, such as `GDK_SCALE=0.5 GDK_DPI_SCALE=0.5` are not working in this instance.

Thank you!

Start by tracing the display_screen entry point and its SDL window setup, then reproduce the oversized, non-resizable window on Ubuntu 21.10 at 1920x1080. Investigate whether window scaling, DPI handling, or HiDPI defaults control the behavior; done means the window fits the display and resizing or an explicit scaling option works.

Written by the indexing model from the issue text.