Bumped the board connection line color in both themes so the links
between letters read more clearly:
- light: #e2dbc7 -> #c7bb95
- dark: #33333f -> #52525f
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Single-file rewrite of static/index.html preserving the puzzle API contract,
board coordinates and localStorage format. Adds swipe-to-select, keyboard
tracing (type/Backspace/Enter/Esc), juicy tile animations + confetti, and a
light/dark theme toggle.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>