feat: Add admin mode functionality with login and status checks

- Implemented admin mode configuration in docker-compose.yml
- Added AdminContext and AdminModal components for managing admin state
- Integrated admin login functionality in AuthController
- Updated App component to handle admin status and modal display
- Enhanced ChannelList, ChannelModal, and TvPlaylistModal to support admin features
- Added sensitive information handling in ChannelModal and TvPlaylistModal
- Modified SocketService methods to include admin checks for channel and playlist operations

docker-compose.yml

@@ -30,6 +30,9 @@ services:
       STORAGE_PATH: /streams/
       # If you have problems with the playlist, set the backend url manually here
       #BACKEND_URL: http://localhost:5000
+      # Admin mode configuration
+      ADMIN_ENABLED: "true"
+      ADMIN_PASSWORD: "your_secure_password"
     networks:
       - app-network