Replace the batch rtl_power SSE pipeline with continuous I/Q streaming
via WebSocket for smooth ~25fps waterfall display. The server captures
raw I/Q samples (rtl_sdr/rx_sdr), computes Hann-windowed FFT, and
sends compact binary frames (1035 bytes vs ~15KB JSON, 93% reduction).
Client falls back to existing SSE path if WebSocket is unavailable.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds support for SDRPlay RSP devices (RSPdx, RSP1A, RSPduo, etc.)
through the SoapySDR interface. Closes#44.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>