Updated tokens.css with aligned color values and added missing tokens
(bg-panel, bg-inset, bg-dark, gold-dark, purple-light, violet, green,
green-light, amber, red-light, red-soft, text-dim, text-light, info).

Updated theme.js applyColors map to support all new tokens via admin
branding panel.

Converted ~85% of all inline hex colors across 50+ JS files to use
var(--token) references. Remaining ~160 are canvas colors (which can't
use CSS vars) and unmapped game-specific colors.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>