Slider control:
- Rewrite drag interaction to use label-based drag instead of track slider
- Remove hardcoded min/max bounds, default to unbounded
- Add ArrowLeft/ArrowRight key support alongside Up/Down
- Cleaner, more compact UI (238 lines vs 332)
ESC key cancel fix:
- Pressing ESC during mid-action (drawing wall, placing slab) now only
cancels the current action, not also switching back to select mode
- Tools mark cancel as consumed via markToolCancelConsumed()
- Second ESC press switches to select mode as before
Window panel:
- Remove hardcoded min/max on position, dimension, and frame sliders
- Works with new unbounded slider defaults
Viewer:
- Re-enable default antialias on WebGPU renderer
- Remove GroundOccluder (no longer needed)
- Add resize debounce (100ms)
- Clean up post-processing pipeline code
