updateRdsPsOverlay was called on every spectrum frame (25 Hz)
regardless of mode, doing 15+ DOM element lookups and text updates
even in USB/AM/CW/etc. The server-side RDS DSP already only runs
in WFM; align the client:
- Spectrum SSE handler: only increment rdsFrameCount and call
updateRdsPsOverlay when lastModeName === "WFM"
- Mode change: call resetRdsDisplay() when switching to or from WFM
so the overlay and RDS panel are cleared promptly
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
sjg
31b40fc1ef
