Implement activity analytics dashboard with real-time stats, charts, and
user leaderboard. Add automated Ruffle update job for Flash emulator
maintenance. Standardize datetime formatting across frontend/backend with
ISO 8601 and user preferences. Enhance security with comprehensive input
validation, rate limiting, and CSRF protection. Improve accessibility
with ARIA labels, keyboard navigation, and screen reader support. Fix
multiple security vulnerabilities including XSS, SQL injection risks, and
session management issues.