style: enhance global CSS for better responsiveness of terminal chips and navigation pills
test: remove inline subscription test and add maintenance mode access code test
feat: implement media library picker dialog for selecting images from the media library
feat: add media URL controls for uploading and managing media assets
feat: add migration for music_enabled and maintenance_mode settings in site settings
feat: implement maintenance mode functionality with access control
feat: create maintenance page with access code input and error handling
chore: add TypeScript declaration for QR code module
