The airband start function was calling parseInt() directly on composite
device selector values like "rtlsdr:0", which always returned NaN and
fell back to device 0. This also meant sdr_type was never sent to the
backend, and could result in int(None) TypeError on the server.
Now properly splits the composite value (matching ADS-B/ACARS/VDL2
pattern) and sends both device index and sdr_type. Also hardened
backend int() parsing to use explicit None checks.
Fixes: "Airband Error: Invalid parameter: int() argument must be a
string, a bytes-like object or a real number, not 'NoneType'"
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
0fbb446209