54e024c1b0
Migrates the last remaining colour, spacing, font-size, and z-index literals in animation_plugin (toasts), hud_plugin (action bar + Modes/Menu popovers), and win_summary_plugin (full win modal restyle) onto the ui_theme token system established in step 1. Win summary now uses SCRIM/BG_ELEVATED/ACCENT_PRIMARY/STATE_* with a yellow Play Again button. Sprite-tinted gameplay art (cards, felt, drop-zone hints, pile markers) and sub-rung pixel sizes (1px borders, fixed cell widths) are intentionally left untouched. cargo build / clippy --workspace -- -D warnings / test --workspace all green (819 passed, 0 failed, 8 ignored).