The scene view stopped at 24 device pixels per world pixel, which is
too little to work on single texels of small pixel art.
- FREE_ZOOM_STEPS gains the steps 32, 48 and 64. All of them are whole
numbers, so every texel keeps the same width on screen.
- The tile editor takes the same steps, so its fit can now land above
24 on a small board.
- The unit test and the step list in e2e 39 follow the new top step.
Tests:
- ./check.sh: 178 files, 2573 tests, CHECK EXIT 0
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>