- Added direct access guards to all PHP files<br />  - Added permission checks to admin function files<br />  - Added license headers to all PHP files<br />  - Added LICENSE file, help.inc, and method.upgrade.php<br />  - Added LazyLoadAdmin() and GetDependencies() metadata methods<br />  - Fixed admin permission check to use module constant instead of generic string<br />  - Simplified uninstall method (proper cleanup of preferences and event handlers)<br />  - Removed closing PHP tags from all files<br />  - Code quality improvements for ModuleChecker compliance