Emoji render as platform-specific colour cartoons (Apple/Windows/Android
each differ) which reads informal in a document going to a club board, and
they cannot inherit brand colour. Replaced every one with a 33-symbol
inline SVG sprite: 24x24, stroke-based, currentColor, sized in em so each
existing icon slot keeps its own scale.

Removed: swimmer, bell, receipt, credit card, mobile, bank, football,
martial-arts, tennis, cartwheel, page, lock, floppy, plug, envelope, gear,
up/down arrows, and the EG regional-indicator flag pair.

Also converted the geometric glyphs sitting in icon slots (fisheye,
diamonds, house, quadrant-circle, square-fill, clock) plus the list
check/x/arrow marks, so the icon layer is uniformly SVG rather than a mix
of text glyphs and emoji. A source scan for emoji ranges now returns clean.

Sprite is hidden with position/width/height rather than display:none,
which can break <use> resolution in some engines.

Fixes an unrelated pre-existing contrast bug found while verifying: .card
h4 is declared after .dark h4 at equal specificity, so the three cards in
the dark flow section rendered navy-on-navy. Added .dark .card h4.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>