v1.1.0 Autoupdate, uninstall and few more

1.1.0
Added GitHub auto-updater (inc/class-updater.php)
Added shared admin design system (db-admin-ui.css)
Added uninstall.php with full cleanup (option, table, cron, transient)
Added LICENSE (GPL v3)
Refactored admin.css to use CSS variables from design system
Updated license to GPL v3 or later

1.0.0
Initial release
Complete SMTP configuration with provider presets
Test email with PHPMailer error diagnostics
Email log with auto-cleanup via WP Cron
System diagnostics
DB Form Builder integration
Encrypted password (wp_encrypt / AES-256-CBC)
GitHub auto-updater
Shared admin design system (db-admin-ui)