Build a music player

• Play and pause, a current-time and duration display, and a seek slider that follows playback and can be dragged to seek
• A playlist with the current track highlighted; clicking a track plays it, and Next and Previous buttons move through the list
• Shuffle and repeat modes (off, repeat all, repeat one); when a track ends the next one starts according to the mode
• The audio element is controlled through a ref: play() returns a promise whose rejection (for example autoplay blocked) is handled
• Volume slider and mute, with the values persisted
• Time updates come from the timeupdate event, and event listeners and the audio source are cleaned up on unmount

Only after every requirement works.

• Keyboard shortcuts and the Media Session API for hardware media keys
• A waveform or buffered-range indicator
• Playback speed control