- Added get_directory_config() and save_directory_config() helper functions
- Created 4 new endpoints:
- GET /api/directory/config - Public endpoint for frontend
- GET /api/admin/directory/config - Admin view with metadata
- PUT /api/admin/directory/config - Update configuration
- POST /api/admin/directory/config/reset - Reset to defaults
- Fixed a bug: Changed SystemSettings.key → SystemSettings.setting_key (correct column name)
- Added JSON serialization/deserialization for storing config in Text column