The default->char-villager coercion (grey-circle guard) applied to legacy-rot too, so an
un-customized single-player showed a villager sprite with no way back to the classic hero.
Exclude legacy-rot from the coercion: default/color appearances now fall through to
RenderEngine's original @ tile fallback (chars/skins still draw their sprites; the tavern
canvas path keeps the villager to avoid grey dots). Updated the splash-legend test to the
new tile-based legend. Suite 62/435 green.