Clean up unused files and tracked junk

Remove the duplicate fancy-wordle-modern.html page, the standalone intro
prototype, the CSS backup and an unused image. Stop tracking .DS_Store and
Playwright MCP logs, and refresh IMPROVEMENTS.md.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

IMPROVEMENTS.md

@@ -8,10 +8,14 @@ Implemented:
 - Preserved dark mode, keyboard input, word-list fetches, dictionary validation, win sound, confetti, definition lookup, and the original love-link shortcut.
 - Added a working stats/share dialog using localStorage.
 - Improved accessibility with semantic buttons, labels, live alerts, visible focus states, and 44px touch targets.
+- One shared word per UTC hour, enforced by Supabase with a browser-only fallback.
+- Email/password accounts with synced stats and an hourly, daily, and all-time leaderboard.
+- Animated intro with a skip button that plays once per tab.
+- Reduced-motion preference for flip, dance, and intro animations.
+- Definition lookup with a timeout and a second provider.
+- Up to 3 saved starter words per account that fill the current row with one tap.
 
 Good next features:
 - Hard mode that forces revealed hints into later guesses.
-- Daily challenge mode alongside the current unlimited mode.
-- Reduced-motion preference for flip, dance, and confetti animations.
 - Offline definition fallback for the target word list.
 - Importable custom word packs for classroom or party play.