Soundtrack player

[3.0.0]

Added

• Custom Songs Support: Upload your own music files (MP3, WAV, OGG, FLAC)
• "+ Add Songs" Button: One-click file picker to easily add custom songs
• Multi-Format Support: Play MP3, WAV, OGG, and FLAC audio files
• Metadata Extraction: Automatically reads song title, artist, and album from audio files
• Custom Track Badge: Purple "C" badge shows which songs are custom
• Album Display: Shows album info for custom tracks in playlist
• Rescan Custom Button: Manually refresh custom songs list