Here is a list of all files with brief descriptions:

lib
config
domain.dart
fake_services_provider_container.dart	Fake services provider container
prefs.dart	Shared preferences
ws_batch_size.dart	WebSocket batch size
data
models
decoderdb
condition.dart
decoder_definition.dart
decoder_detection.dart
definition_version.dart
detection_item.dart
repository.dart
utility.dart
opendcc
locxml.dart
zimo
zpp.dart
zsu.dart
config.dart
connection_status.dart
info.dart
loco.dart
turnout.dart
repositories
roco
z21_cv.dart
z21_short_circuit.dart
z21_status.dart
available_firmware_version.dart
connection_status.dart
dcc.dart
internet_status.dart
locos.dart
settings.dart
sys.dart
turnouts.dart
services
dcc
dcc.dart
fake_dcc.dart
http_dcc.dart
ota
fake_ota.dart
ota.dart
ws_ota.dart
roco
fake_z21.dart
ws_z21.dart
z21.dart
settings
fake_settings.dart
http_settings.dart
settings.dart
sys
fake_sys.dart
http_sys.dart
sys.dart
zimo
decup
decup.dart
fake_decup.dart
ws_decup.dart
mdu
fake_mdu.dart
mdu.dart
ws_mdu.dart
zusi
fake_zusi.dart
ws_zusi.dart
zusi.dart
http_client.dart
doxygen.dart	Data documentation
domain
models
decoder.dart
register.dart
doxygen.dart	Domain documentation
ui
core
themes
dark_mode.dart
dark_theme.dart
icon_size.dart	Icon size
light_theme.dart
small_screen_width.dart	Small screen width
text_scaler.dart
throttle_size.dart	Throttle size
widgets
add_edit_dialog.dart	Dialog to add or edit loco or turnout
confirmation_dialog.dart	Dialog to cancel or confirm action
default_animated_size.dart	Default animated size
delete_dialog.dart	Dialog to delete loco or turnout
download_dialog.dart	Dialog to download file and show progress
error_gif.dart	Error GIF
ignore_intrinsics.dart	Ignore intrinsics
loading_gif.dart	Loading GIF
open_remise_icons.dart	OpenRemise icons
png_picture.dart	PNG picture
power_icon_button.dart	Power icon button
short_circuit_dialog.dart	Short circuit popup dialog
decoders
view_models
decoder_filter.dart
decoder_selection.dart
filtered_locos.dart
filtered_turnouts.dart
widgets
screen.dart
home
view_models
home_view_model.dart
widgets
home_view.dart	Main
positioned_draggable.dart	Positioned draggable
info
widgets
screen.dart
program
view_models
decoder_detection_state.dart	Decoder detection state
decoder_detection_view_model.dart
exception.dart	Program exception
widgets
decoder_detection_dialog.dart	Dialog to detect decoder using DecoderDB
manual.dart
screen.dart
settings
widgets
export_dialog.dart
import_dialog.dart
screen.dart
tile.dart	Settings tile
throttle
view_models
throttle_view_model.dart
widgets
cv_editing_controller.dart
cv_terminal.dart
key_codes.dart	Key codes
key_press_notifier.dart
keypad.dart
railcom.dart
throttle.dart
update
view_models
zimo
decup_service.dart
decup_view_model.dart
mdu_service.dart
mdu_view_model.dart
zusi_service.dart
zusi_view_model.dart
exception.dart	Update exception
ota_service.dart
ota_view_model.dart
state.dart	Update state
widgets
zimo
decup_dialog.dart	Dialog to update or upload ZIMO MX decoders
mdu_dialog.dart	Dialog to update or upload ZIMO MS, MN, FS and FN decoders
sound_dialog.dart	Dialog to download ZPP project from ZIMO sound database
zusi_dialog.dart	Dialog to upload sound to ZIMO decoders
ota_dialog.dart	Dialog to update OpenRemise boards
screen.dart
doxygen.dart	UI documentation
utils
color_mappers
dark_mode_color_mapper.dart
grayscale_color_mapper.dart
validators
address_validator.dart
cv_number_validator.dart
cv_value_validator.dart
ip_address_validator.dart
loco_address_validator.dart
name_validator.dart
password_validator.dart
ssid_validator.dart
turnout_address_validator.dart
crc32.dart
crc8.dart
doxygen.dart	Utils documentation
exor.dart
latin1uri.dart
paged_cv_address.dart
turnout_map.dart	Turnout map
doxygen.dart	Documentation
main.dart	Main