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Wire the StereoDenoise processor through the full stack: - Add SetWfmDenoise command variant and RigCat trait method (trx-core) - Add wfm_denoise field to RigFilterState with default true - Add protocol command and bidirectional mapping (trx-protocol) - Add rig_task command handler (trx-server) - Implement set_wfm_denoise in SoapySdrRig backend - Add /set_wfm_denoise API endpoint (trx-frontend-http) - Add denoise checkbox in WFM controls with SSE sync and localStorage persistence Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stan Grams <sjg@haxx.space>