Enable alpha blending on the controls texture so sprite icons
float on any background without white cell artifacts. Regenerate
skin template with transparent cells and magenta gutters. Change
focus highlight from blue to red.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The spritesheet is compiled in as a C byte array. An external
controls.png in cwd still takes precedence for skinning. Includes
tools/embed_png.py to regenerate the header if the asset changes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
