feat(cat): MY_RIG follows the radio that is connected

With one rig, MY_RIG belonged in Operating conditions and nowhere else.
With several, that becomes the wrong place: operating conditions describe
a PLAN — 'on 20 m I use the beam and the 7300' — while the question a
logged QSO asks is which radio was keying.

So each saved radio carries its own MY_RIG, consulted BEFORE the per-band
station. When the two disagree — a second rig borrowed for one evening on
20 m — the one that is transmitting is the true answer.

Left empty it changes nothing at all: the old chain (band default, then
the profile's rig) answers exactly as it did, which is what every
single-radio station will keep doing without touching a setting.

app.go

@@ -3338,6 +3338,10 @@ func (a *App) applyStationDefaults(q *qso.QSO, includeIdentity bool) {
 	// Per-band rig/antenna from Operating conditions (the antenna ticked as
 	// DEFAULT for this band) — the same auto-fill the entry strip does, applied
 	// here so imported QSOs get MY_RIG / MY_ANTENNA from the band defaults.
+	// The radio that is CONNECTED names itself first — see activeRadioMyRig.
+	if q.MyRig == "" {
+		q.MyRig = a.activeRadioMyRig()
+	}
 	if a.operating != nil && q.Band != "" && (q.MyRig == "" || q.MyAntenna == "") {
 		if d, ok, _ := a.operating.BandDefault(a.ctx, p.ID, q.Band); ok {
 			if q.MyRig == "" {
@@ -13401,7 +13405,12 @@ func (a *App) LogUDPLoggedADIF(adifText string) (int64, error) {
 
 	// ── Operating-conditions stamp ──
 	// Pre-fill MY_RIG / MY_ANTENNA / TX_PWR from the default antenna for
-	// this band (if the user has configured Operating conditions).
+	// this band (if the user has configured Operating conditions) — after the
+	// connected radio has had its say, since it knows which rig is keying and
+	// the band default only knows which one was planned.
+	if q.MyRig == "" {
+		q.MyRig = a.activeRadioMyRig()
+	}
 	if a.operating != nil && a.profiles != nil {
 		if p, err := a.profiles.Active(a.ctx); err == nil {
 			if d, ok2, _ := a.operating.BandDefault(a.ctx, p.ID, q.Band); ok2 {

app_radios.go

@@ -43,6 +43,14 @@ type RadioConfig struct {
 	// the CAT panel has always edited, so a saved radio is exactly "what the
 	// settings said the day it was saved".
 	Settings CATSettings `json:"settings"`
+	// MyRig is what goes into MY_RIG on a QSO made with this radio.
+	//
+	// It belongs here rather than in Operating conditions once there is more
+	// than one rig: the operating conditions describe a PLAN — "on 20 m I use
+	// the beam and the 7300" — while this is the fact of which radio is keying.
+	// Left empty, nothing changes: the old chain (band default, then the
+	// profile's rig) answers exactly as it did.
+	MyRig string `json:"my_rig"`
 }
 
 // radioLabel is what the status bar shows when the operator never named one.
@@ -204,3 +212,26 @@ func (a *App) syncActiveRadio(s CATSettings) {
 		}
 	}
 }
+
+// activeRadioMyRig is the MY_RIG of the radio currently connected, or "".
+//
+// Consulted BEFORE the per-band default, and deliberately: the band default is
+// what the operator planned to use on that band, this is which radio is
+// actually on the air. When they disagree — a second rig borrowed for one
+// evening on 20 m — the one that is transmitting is the true answer.
+func (a *App) activeRadioMyRig() string {
+	if a.settings == nil || strings.TrimSpace(a.settingOr(keyRadiosList, "")) == "" {
+		return "" // no list was ever made: nothing to say, nothing changes
+	}
+	list, err := a.GetRadios()
+	if err != nil {
+		return ""
+	}
+	id := a.ActiveRadioID()
+	for _, r := range list {
+		if r.ID == id {
+			return strings.TrimSpace(r.MyRig)
+		}
+	}
+	return ""
+}

frontend/src/components/SettingsModal.tsx

@@ -3266,7 +3266,19 @@ function SettingsModalImpl({ onClose, onSaved, initialSection, onMainPaneChanged
                 <Trash2 className="size-3.5" />
               </Button>
             </div>
+            {/* MY_RIG follows the radio, not the profile.
+                Operating conditions describe a PLAN — "on 20 m I use the beam
+                and the 7300" — while this is the fact of which rig is keying.
+                Empty leaves the old chain alone. */}
+            <div className="flex items-center gap-2">
+              <Label className="shrink-0 w-24">{t('cat.radioMyRig')}</Label>
+              <Input className="h-9 flex-1" placeholder={t('cat.radioMyRigPh')}
+                value={(radios.find((r: any) => r.id === activeRadio)?.my_rig) ?? ''}
+                onChange={(e) => setRadios((l) => l.map((r: any) => r.id === activeRadio ? { ...r, my_rig: e.target.value } : r))}
+                onBlur={() => { SaveRadios(radios as any).catch(() => {}); }} />
+            </div>
             <p className="text-[11px] text-muted-foreground">{t('cat.radioHint')}</p>
+            <p className="text-[11px] text-muted-foreground">{t('cat.radioMyRigHint')}</p>
           </div>
 
           <label className="flex items-center gap-2 text-sm cursor-pointer">

frontend/wailsjs/go/models.ts

@@ -3573,6 +3573,7 @@ export namespace main {
 	    id: string;
 	    name: string;
 	    settings: CATSettings;
+	    my_rig: string;
 	
 	    static createFrom(source: any = {}) {
 	        return new RadioConfig(source);
@@ -3583,6 +3584,7 @@ export namespace main {
 	        this.id = source["id"];
 	        this.name = source["name"];
 	        this.settings = this.convertValues(source["settings"], CATSettings);
+	        this.my_rig = source["my_rig"];
 	    }
 	
 		convertValues(a: any, classs: any, asMap: boolean = false): any {