Make limiterEnabled control the stereo limiter stage only while leaving hard clipping active, and update UI/docs to distinguish saved RadioText from the active on-air value exposed at runtime.

Extend the RDS feature set with LPS and eRT support, add initial RDS2/logo-transfer wiring, update the control UI and refresh the PlutoSDR example configuration and reference docs.

Extend the RDS stack with TP/TA live updates, CT, RT+, PTYN, AF and EON support, and add UI/config controls for the new RDS feature set.

Add experimental single-sideband and vestigial-sideband stereo encoding
modes alongside the standard DSB-SC stereo subcarrier path.

- add encoder mode selection (DSB, SSB, VSB)
- add Hilbert-transform based quadrature path for SSB generation
- add vestigial split with low-band DSB and high-band SSB handling
- wire the mode through config, control, engine, generator, and fmrtx
- add test coverage for the SSB path

The default mode remains the standard DSB stereo encoder.

Embed a browser-based control surface into the HTTP server and document the live-control API. The new UI exposes TX start/stop, runtime telemetry, frequency, levels, toggles, and RDS text updates against the existing live-config endpoints.