v0.2.4 alpha

PC-XT DOS emulator: boots real DOS from .img disks in /dos on SD, or mounts a folder of games as the C: drive
MP3 music player: plays from /Music on SD, tag-based library, playlists, keeps playing in the background
Doom now has music, and the sound effect static is finally fixed
Full emoji support: type emojis with the alt key layer, downloadable extended set
Rooms and repeaters: log in, sync missed messages, admin console
File manager for internal flash and SD (Tools > Files)
USB host audio: route all sound to a USB-C audio dongle (needs external y adaptor with power)