chore(box): commit firmware base + feature docs
Backfills the working firmware that had stayed uncommitted across the
build sessions, so the branch is self-contained.
- audio: audio_player, radio_pipeline, sd_player, calm_tone, aac_player
- net: podcast (RSS), udp_log
- modes: balloons, plus calm/games/radio tweaks
- ui: fonts header, icons; build files (CMakeLists, idf_component.yml,
sdkconfig.defaults)
- docs/superpowers: Histoires design + plan
Note: sdkconfig stays gitignored (Wi-Fi creds + tuned LFN/FS/mbedtls
settings); a fresh checkout must reconfigure those.
Clément Saillant
e35058f53d