.loader-wordmark had no explicit width or text-align, so as a flex
item (align-items: center) it shrink-wrapped to whatever width the
"RanaZe" inline spans needed. wordmark-trainer's display:block then
filled that same ambiguous width rather than the wordmark block's
true rendered box, leaving it off-center relative to "RanaZe" above
it. Giving .loader-wordmark an explicit width:100% and text-align:
center makes both lines center within the same known-width box.
Verified in a real browser: both elements now report identical
getBoundingClientRect() centers (x=960 in a 1920px viewport).
Replaces the OS/window icon with the new dark-background logo design,
and derives a transparent shield-mark cutout (via chroma-key against
the flat background) for the in-app login/sidebar mark and the web
loading-screen logo. Brand.ranaze_mark_texture() no longer needs the
AtlasTexture crop since the new source asset is already tightly
cropped to the mark.