src/main/java/com/museum/projection/dto/PlayedTrackDto.java

...ain/java/com/museum/projection/service/ClientService.java

...in/java/com/museum/projection/service/ControlService.java

src/main/resources/static/js/control.js

src/main/resources/static/js/main.js

src/main/resources/templates/control.html

src/main/resources/templates/fragments/client.html

src/main/resources/templates/main.html