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Add silence detection that resets the demodulator state when RMS drops below threshold, so burst-mode APRS packets after squelch activation start with a clean correlator and clock recovery. Display CRC-failing frames at reduced opacity with a [CRC] tag to aid debugging. Enhanced CRC-fail console logging now includes attempted address decode, bit count, and hex dump. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>