feat(tci): read the radio's declared format, and record a test WAV

The SunSDR announces its own stream at connect —
audio_stream_sample_type:float32 and audio_stream_channels:2 — and both
were being logged as unhandled while the code worked the format out from
frame arithmetic. The declaration is better evidence and arrives before
the first frame; the arithmetic stays as the check on it. The channel
count now drives the mix-down instead of an assumed stereo.

Adds a ten-second test recording, written as a WAV beside the QSO
recordings. Counting frames proves a socket is delivering bytes; it says
nothing about whether those bytes are the receiver's audio, at the right
rate, in the right order. A stream decoded with the width wrong or the
samples misaligned counts exactly as well as a correct one and sounds
like a fan — so the test is a file the operator can play, the same way
the CW decoder was settled on the air rather than on a spectrogram.

The file is written at the rate the RADIO reported, not a constant: a
recording at the wrong rate plays at the wrong speed, which is the one
fault that would be blamed on the decoding.

frontend/src/components/SettingsModal.tsx

@@ -58,7 +58,7 @@ import {
   GetFolderSync, SaveFolderSync, PickFolderSyncFolder, GetFolderSyncStatus, SyncFolderNow,
   GetRelayAuto, SaveRelayAuto, GetStationDevices,
   GetAwardDefs, GetTrackedAwards, SaveTrackedAwards,
-  GetBandOpenSettings, SaveBandOpenSettings, GetGridScopeSettings, SaveGridScopeSettings, GetPSKReporterStatus, GetChaseNewGrids, SetChaseNewGrids, GetChaseNew, SetChaseNew, GetGridCacheStatus, GetLinkedAmps, SetLinkedAmps, GetSpotTTLMinutes, SetSpotTTLMinutes, GetSpotMax, SetSpotMax, StartTCIAudio, StopTCIAudio, GetTCIAudioStatus,
+  GetBandOpenSettings, SaveBandOpenSettings, GetGridScopeSettings, SaveGridScopeSettings, GetPSKReporterStatus, GetChaseNewGrids, SetChaseNewGrids, GetChaseNew, SetChaseNew, GetGridCacheStatus, GetLinkedAmps, SetLinkedAmps, GetSpotTTLMinutes, SetSpotTTLMinutes, GetSpotMax, SetSpotMax, StartTCIAudio, StopTCIAudio, GetTCIAudioStatus, RecordTCIAudio,
 } from '../../wailsjs/go/main/App';
 import type { profile as profileModels } from '../../wailsjs/go/models';
 import type { LookupSettingsForm, StationSettingsForm, ListsSettingsForm, ModePresetForm } from '@/types';
@@ -1947,6 +1947,8 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
   // that asks the backend twice a second for a stream nobody started is work
   // done for nothing.
   const [tciAudio, setTciAudio] = useState<any>({ running: false, sample_rate: 0, frames: 0, peak_db: -99 });
+  const [tciRecBusy, setTciRecBusy] = useState(false);
+  const [tciRecPath, setTciRecPath] = useState('');
   useEffect(() => {
     if (!tciAudio.running) return;
     const id = window.setInterval(() => { GetTCIAudioStatus().then(setTciAudio).catch(() => {}); }, 500);
@@ -6577,6 +6579,25 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
                 </span>
               )}
             </div>
+            {/* The test that actually settles it. Frames arriving proves a
+                socket is delivering bytes; it says nothing about whether those
+                bytes are the receiver's audio, at the right rate, in the right
+                order. A file the operator can PLAY says all three at once. */}
+            {tciAudio.running && (
+              <div className="flex items-center gap-3 flex-wrap">
+                <Button variant="outline" size="sm" className="h-8" disabled={tciRecBusy}
+                  onClick={() => {
+                    setTciRecBusy(true); setTciRecPath('');
+                    RecordTCIAudio(10)
+                      .then((p: string) => setTciRecPath(p))
+                      .catch((e: any) => setTciAudio((s: any) => ({ ...s, last_err: String(e?.message ?? e) })))
+                      .finally(() => setTciRecBusy(false));
+                  }}>
+                  {tciRecBusy ? t('aud.tciRecBusy') : t('aud.tciRec')}
+                </Button>
+                {!!tciRecPath && <span className="text-[11px] font-mono text-muted-foreground truncate">{tciRecPath}</span>}
+              </div>
+            )}
             {!!tciAudio.last_err && <p className="text-[11px] text-danger">{tciAudio.last_err}</p>}
             <p className="text-[11px] text-muted-foreground">{t('aud.tciHint')}</p>
           </div>

frontend/src/lib/i18n.tsx

@@ -494,7 +494,7 @@ const en: Dict = {
   'aud.noneDefault': '— none / system default —', 'aud.defaultTag': '(default)',
   'aud.fromRadioShort': 'From Radio', 'aud.toRadioShort': 'To Radio', 'aud.explainFrom': '= what you receive (used by the QSO recorder).', 'aud.explainTo': '= where voice-keyer messages are transmitted.',
   'aud.monitorTitle': "Hear the rig's RX audio (From Radio) through your Listening device", 'aud.listenRadio': '▶ Listen to radio', 'aud.stopListening': '■ Stop listening',
-  'aud.monitorOn': 'RX monitor running — From Radio → Listening device.', 'aud.tciTitle': 'SunSDR receive audio over TCI (experimental)', 'aud.tciStart': 'Open the stream', 'aud.tciStop': 'Close the stream', 'aud.tciSilent': 'silent', 'aud.tciHint': 'Takes the receive audio straight from the radio over TCI, with no virtual audio cable and no second sound card. Receive only for now — the voice keyer still uses the devices above. Requires the CAT backend to be TCI.', 'aud.monitorHint': 'Live-monitor the rig here (USB codec now; network audio later).',
+  'aud.monitorOn': 'RX monitor running — From Radio → Listening device.', 'aud.tciTitle': 'SunSDR receive audio over TCI (experimental)', 'aud.tciStart': 'Open the stream', 'aud.tciStop': 'Close the stream', 'aud.tciRec': 'Record 10 s to listen', 'aud.tciRecBusy': 'Recording…', 'aud.tciSilent': 'silent', 'aud.tciHint': 'Takes the receive audio straight from the radio over TCI, with no virtual audio cable and no second sound card. Receive only for now — the voice keyer still uses the devices above. Requires the CAT backend to be TCI.', 'aud.monitorHint': 'Live-monitor the rig here (USB codec now; network audio later).',
   'aud.txTitle': 'Key PTT and pipe your live mic into the rig (To Radio device)', 'aud.talkRadio': '🎙 Talk to radio (TX)', 'aud.stopTalk': '■ Stop talking (TX)',
   'aud.txOn': 'TRANSMITTING — mic → To Radio, PTT keyed. Click to stop.', 'aud.txHint': 'Live mic → rig with PTT (USB now; network TX later).',
   'aud.recorder': 'QSO recorder', 'aud.recordEvery': 'Record every QSO to an audio file (From Radio + your mic)', 'aud.recFolder': 'Recordings folder', 'aud.browse': 'Browse…',
@@ -962,7 +962,7 @@ const fr: Dict = {
   'aud.noneDefault': '— aucun / défaut système —', 'aud.defaultTag': '(défaut)',
   'aud.fromRadioShort': 'Depuis la radio', 'aud.toRadioShort': 'Vers la radio', 'aud.explainFrom': "= ce que vous recevez (utilisé par l'enregistreur de QSO).", 'aud.explainTo': '= où sont émis les messages du manipulateur vocal.',
   'aud.monitorTitle': "Écouter l'audio RX du poste (Depuis la radio) sur votre périphérique d'écoute", 'aud.listenRadio': '▶ Écouter la radio', 'aud.stopListening': "■ Arrêter l'écoute",
-  'aud.monitorOn': "Écoute RX active — Depuis la radio → périphérique d'écoute.", 'aud.tciTitle': 'Audio de réception SunSDR par TCI (expérimental)', 'aud.tciStart': 'Ouvrir le flux', 'aud.tciStop': 'Fermer le flux', 'aud.tciSilent': 'silence', 'aud.tciHint': "Prend l'audio de réception directement sur la radio via TCI, sans câble audio virtuel ni seconde carte son. Réception seulement pour l'instant — le manipulateur vocal utilise toujours les périphériques ci-dessus. Nécessite le CAT réglé sur TCI.", 'aud.monitorHint': "Écoute directe du poste (codec USB pour l'instant ; audio réseau plus tard).",
+  'aud.monitorOn': "Écoute RX active — Depuis la radio → périphérique d'écoute.", 'aud.tciTitle': 'Audio de réception SunSDR par TCI (expérimental)', 'aud.tciStart': 'Ouvrir le flux', 'aud.tciStop': 'Fermer le flux', 'aud.tciRec': 'Enregistrer 10 s pour écoute', 'aud.tciRecBusy': 'Enregistrement…', 'aud.tciSilent': 'silence', 'aud.tciHint': "Prend l'audio de réception directement sur la radio via TCI, sans câble audio virtuel ni seconde carte son. Réception seulement pour l'instant — le manipulateur vocal utilise toujours les périphériques ci-dessus. Nécessite le CAT réglé sur TCI.", 'aud.monitorHint': "Écoute directe du poste (codec USB pour l'instant ; audio réseau plus tard).",
   'aud.txTitle': 'Activer le PTT et envoyer votre micro vers le poste (périphérique « Vers la radio »)', 'aud.talkRadio': '🎙 Parler à la radio (TX)', 'aud.stopTalk': '■ Arrêter de parler (TX)',
   'aud.txOn': 'ÉMISSION — micro → Vers la radio, PTT activé. Cliquez pour arrêter.', 'aud.txHint': "Micro direct → poste avec PTT (USB pour l'instant ; TX réseau plus tard).",
   'aud.recorder': 'Enregistreur de QSO', 'aud.recordEvery': 'Enregistrer chaque QSO dans un fichier audio (Depuis la radio + votre micro)', 'aud.recFolder': 'Dossier des enregistrements', 'aud.browse': 'Parcourir…',

frontend/wailsjs/go/main/App.d.ts

@@ -905,6 +905,8 @@ export function RecomputeAllAwardRefs():Promise<number>;
 
 export function RecomputeAwardRefsForCode(arg1:string):Promise<number>;
 
+export function RecordTCIAudio(arg1:number):Promise<string>;
+
 export function RefreshCtyDat():Promise<main.CtyDatInfo>;
 
 export function RefreshKenwood():Promise<void>;

frontend/wailsjs/go/main/App.js

@@ -1750,6 +1750,10 @@ export function RecomputeAwardRefsForCode(arg1) {
   return window['go']['main']['App']['RecomputeAwardRefsForCode'](arg1);
 }
 
+export function RecordTCIAudio(arg1) {
+  return window['go']['main']['App']['RecordTCIAudio'](arg1);
+}
+
 export function RefreshCtyDat() {
   return window['go']['main']['App']['RefreshCtyDat']();
 }