Adds a Local ADS-B layer fed by your own receivers: a browser WebUSB
RTL-SDR (with FM listening) and local 1090/978 MHz decoder feeds
(LOCAL_RECEIVER_FEEDS, local and private addresses only). Local aircraft
draw in magenta with class, silhouettes, 3D models, trails and a position
sanity filter; the click card names the band and input that heard them.
Builds on Sameh Khamis's SDR prototype and the initial GEV port by
Mazeyar Moeini Feizabadi (#134); the decoder-feed design follows the
notes on #57. Closes#57.
Co-authored-by: Sameh Khamis <[email protected]>
Co-authored-by: Mazeyar Moeini Feizabadi <[email protected]>
The macOS credential hardener strips ACLs with `chmod -N`, spawning
`chmod` by bare name. On machines where Nix home-manager or Homebrew
coreutils sit ahead of /bin on PATH, that resolves to GNU chmod, which
has no `-N` flag and exits non-zero. The hardener treated that as a
failure and refused every save from the Provider Settings panel with
"could not restrict the credential file to your account; nothing was
saved".
Spawn /bin/chmod by absolute path instead, matching how the Windows
branch already resolves its native tools without consulting PATH, and
add a regression test that pins the absolute path.
