I made some progress on this today. It helped that I figured out how to customize the color temperature on my monitor and change the color theme of my text editor. Now that I have a dark background with lower light levels, it's easier to stare at code. In test.php, I got scaling to work for tiled boards, and I got the file markers to show up properly for the grid shape, but there are still issues with displaying full board images.
I made some progress on this today. It helped that I figured out how to customize the color temperature on my monitor and change the color theme of my text editor. Now that I have a dark background with lower light levels, it's easier to stare at code. In test.php, I got scaling to work for tiled boards, and I got the file markers to show up properly for the grid shape, but there are still issues with displaying full board images.