- Add CwDsp with FIR bandpass filter, envelope detection, Goertzel tone detector - Add CwDecoder with real-time Morse timing analysis and character lookup - Add CW state/actions to RadarState, wire into RadarViewModel - Add collapsible CW decoder panel to transceivers page - 19 unit tests covering DSP, Morse table, and decoder state - Shares IAudioCapture with SSTV, auto-stops SSTV when CW starts