- leaderboard.html, replays.html: escape user-supplied display_name and
username before inserting into innerHTML to prevent stored XSS
- game.js: call POST /api/replays on win so browser-game completions are
recorded; scores were never submitted before this fix
- replays.rs: after replay insert, upsert leaderboard best_score /
best_time_secs for opted-in users when the new score beats their current
best (classic mode only); scores were never updated before this fix
- leaderboard.rs: add LIMIT 100 to GET /api/leaderboard to prevent
unbounded query growth
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300