You can see that the free travel of the lever of the hydraulic front-wheel brake has increased considerably. What do you have to do?

You answered correctly. If you notice that the free travel of the hydraulic front-wheel brake lever has increased significantly, this is a sign that something may be wrong with the braking system—such as worn brake pads, air in the hydraulic system, or a leak. The safest and mandatory action is to have the brake components checked by a professional immediately. This is because proper brake function is essential for your safety and for meeting legal requirements. Simply adjusting the lever or relying only on the rear brake is not sufficient or safe, as it does not resolve the underlying issue. Always address brake problems promptly to avoid accidents and legal complications.