Android's adaptive-icon mask clipped the bamboo artwork and showed a
white backing on install. Fix the icon set so it survives masking.
- maskable icons: artwork fitted inside the 0.40W safe-zone circle,
opaque full-bleed background (no transparency, so no white fill)
- any icons: rounded-corner tiles with transparent corners
- drop legacy transparent android-icon-* (RealFaviconGenerator) that
Android picked up as adaptive icons and backed with white
- rename to icon-tile-*/icon-maskable-* so the manifest src changes
and installed PWAs re-fetch the launcher icon
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
