Tronsoft Games Portal v6.31.12 Released

# Tronsoft Games Portal v6.31.12
## News Delivery and Subscriber Notifications

### Added
- Automatic email notifications for game releases.
- Automatic email notifications for website updates.
- User notification preferences.
- Immediate, daily digest, weekly digest, and never delivery options.
- Category controls for games, website updates, security notices, and newsletters.
- Secure unsubscribe links.
- Notification history for each user.
- Duplicate email protection for each user, article, and notification type.
- Queue-based sending using the existing email system.
- Automatic retry support through the existing email queue.
- Daily and weekly digest builders.
- Admin queue processor, retry controls, cancellation, and test email.
- Editable plain-text email templates.
- Subscriber, pending, sent, and failed statistics.

### New Pages
- `/admin/news-delivery.php`
- `/notification-preferences.php`
- `/account/notification-preferences.php`
- `/unsubscribe-news.php`

### Integration
When automatic news publishes an article, eligible immediate subscribers are
queued automatically. Delivery failures never cancel the news article, game
publication, or website update.