Summary

When a slice enters FDVU or FDVL mode (FreeDV Docker waveform, firmware v4.2.18+), the VFO widget now shows a live sync/SNR status panel — reusing the existing RADE sync LED and SNR display infrastructure.

• Badge label displays "FreeDV" instead of "RADE"
• Sync LED (green = synced, grey = not synced) driven by FreeDV_SNR meter (EXT_WVF source) using the SNR == -99 sentinel
• SNR dB readout shown while synced (yellow <5 dB, green ≥5 dB); "---" while not synced
• Callsign and freq-offset fields intentionally left blank (waveform does not provide them via the meter bus)
• Activates/deactivates on mode change (FDVU/FDVL ↔ anything else), slice removal, and reconnect
• Handles waveform restarts: re-resolves the dynamic FreeDV_SNR meter index on RadioModel::metersChanged

Implementation

VfoWidget — setRadeActive(bool on, const QString& label = "RADE"): optional label parameter so all existing RADE callers are unaffected.

MainWindow — new private methods activateFdvDisplay, deactivateFdvDisplay, onFdvMeterUpdated, onFdvMetersChanged (all inside #ifdef HAVE_RADE). Hooked into the existing modeChanged lambda in onSliceAdded, onSliceRemoved, and after wireVfoWidget for the reconnect scenario.

Test plan

• Connect to radio with FreeDV Docker waveform installed
• Set a slice to FDVU — confirm "FreeDV ○" badge appears in VFO widget
• With waveform synced to a station — confirm LED turns green and SNR dB updates
• Verify SNR text is yellow below 5 dB and green at 5 dB and above
• Change slice back to USB — confirm FreeDV panel hides
• Close the FDVU slice — confirm no crash, panel gone
• Disconnect and reconnect with a slice already in FDVU — confirm panel appears on reconnect

Draft: Opened as draft pending live FreeDV traffic test to verify sync LED and SNR meter flow end-to-end.

🤖 Generated with Claude Code