aa367239de
PKT: default 25 kHz, max 50 kHz (was 3 kHz / 25 kHz). AM: default 9 kHz, max 20 kHz (was 6 kHz / 15 kHz). Applied consistently across the UI mode-defaults table (trx-frontend-http), server initial-mode logic (trx-server), and the SoapySDR DSP channel (trx-backend-soapysdr). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Signed-off-by: Stan Grams <sjg@haxx.space>