feat(worked): fold portable callsigns into the worked-before history

Typing RK3DWA found nothing while RK3DWA/3 found 21 QSOs, so a station's
history was only visible if you happened to type the exact form it had been
logged under — and an operator who worked it as /0, /P or /MM saw none of it.
The other RDA tools and Log4OM fold these together; this does too.

The predicate strips the suffix from what was typed and matches "call = base OR
call LIKE base/%", so it works from either end: the base call finds the portable
QSOs and a portable call finds the plain ones. Deliberately not a bare prefix
LIKE 'RK3DWA%', which would also match RK3DWAB — a different station. The '/' is
what makes it the same operator.

Settings -> General to turn it off. Default ON, hence the inverted storage: an
existing install has no key, and reading that as OFF would leave everyone with
the behaviour we were asked to change.

Contest dupe checking is untouched — it runs through ContestDupe, a separate
binding, and stays an exact match as a contest requires.

frontend/src/components/SettingsModal.tsx

@@ -27,6 +27,7 @@ import {
   AudioStartTX, AudioStopTX, AudioTXActive,
   ListClusterServers, SaveClusterServer, DeleteClusterServer,
   GetClusterAutoConnect, SetClusterAutoConnect, GetSelfSpotSettings, SaveSelfSpotSettings,
+  GetWorkedCallVariants, SetWorkedCallVariants,
   ConnectClusterServer, DisconnectClusterServer,
   ConnectAllClusters, DisconnectAllClusters, GetClusterStatus,
   GetBackupSettings, SaveBackupSettings, RunBackupNow, PickBackupFolder,
@@ -1524,6 +1525,8 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
 
   const [clusterServers, setClusterServers] = useState<ClusterServer[]>([]);
   const [clusterAutoConnect, setClusterAutoConnectState] = useState(false);
+  // Defaults to true so the checkbox matches the backend before the read lands.
+  const [workedVariants, setWorkedVariants] = useState(true);
   // Self-spot. SELF_SPOT_MIN_MIN mirrors the backend floor — the input clamps on
   // blur, not per keystroke, or typing "10" would be rewritten to "5" the moment
   // the "1" landed and the field would fight the operator.
@@ -1632,6 +1635,7 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
         try { setAudioCfg(await GetAudioSettings() as any); } catch {}
         try { setEmailCfg(await GetEmailSettings() as any); } catch {}
         try { setEqslCfg(await QSLGetEmailTemplates() as any); } catch {}
+        try { setWorkedVariants(await GetWorkedCallVariants()); } catch {}
         reloadAudioDevices();
         reloadDvk();
       } catch (e: any) {
@@ -5666,6 +5670,13 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
             <Checkbox checked={autofocusWB} onCheckedChange={(c) => { const v = !!c; setAutofocusWB(v); writeUiPref('opslog.autofocusWB', v ? '1' : '0'); }} />
             {t('gen.autofocusWB')}
           </label>
+          {/* Backend setting, not a UI pref: the fold happens in the SQL. Saved
+              instantly like the rest of this panel. */}
+          <label className="flex items-center gap-2 text-sm cursor-pointer">
+            <Checkbox checked={workedVariants}
+              onCheckedChange={(c) => { const v = !!c; setWorkedVariants(v); SetWorkedCallVariants(v).catch((e: any) => setErr(String(e?.message ?? e))); }} />
+            {t('gen.workedVariants')} <span className="text-xs text-muted-foreground">{t('gen.workedVariantsHint')}</span>
+          </label>
           <label className="flex items-center gap-2 text-sm cursor-pointer">
             <Checkbox checked={showBeamMap} onCheckedChange={(c) => { const v = !!c; setShowBeamMap(v); writeUiPref('opslog.showBeamOnMap', v ? '1' : '0'); }} />
             {t('gen.showBeam')}

frontend/src/lib/i18n.tsx

@@ -186,6 +186,7 @@ const en: Dict = {
   // General panel
   'gen.hint': 'App behaviour (saved instantly).',
   'gen.autofocusWB': 'Auto-focus "Worked before" for known stations',
+  'gen.workedVariants': '"Worked before" folds portable callsigns together', 'gen.workedVariantsHint': '(RK3DWA also finds RK3DWA/3, /P, /MM — and the other way round. Contest dupe checking stays exact.)',
   'gen.showBeam': 'Show the antenna beam heading on the Main map',
   'gen.startEqEnd': 'QSO start time = end time', 'gen.startEqEndHint': '(matches LoTW when you call a while)',
   'gen.showQsoRate': 'Show QSO rate in the header', 'gen.showQsoRateHint': '(QSOs/hour, projected from the last 10 / 60 min)',
@@ -607,6 +608,7 @@ const fr: Dict = {
   'relayauto.from': 'de', 'relayauto.to': 'à',
   'gen.hint': 'Comportement de l\'application (enregistré immédiatement).',
   'gen.autofocusWB': 'Focus auto sur « Déjà contacté » pour les stations connues',
+  'gen.workedVariants': '« Déjà contacté » regroupe les indicatifs portables', 'gen.workedVariantsHint': '(RK3DWA trouve aussi RK3DWA/3, /P, /MM — et inversement. Le contrôle de doublon en concours reste strict.)',
   'gen.showBeam': 'Afficher le cap de l\'antenne sur la carte principale',
   'gen.startEqEnd': 'Heure de début du QSO = heure de fin', 'gen.startEqEndHint': '(correspond à LoTW quand tu appelles un moment)',
   'gen.showQsoRate': 'Afficher le rythme QSO dans la barre du haut', 'gen.showQsoRateHint': '(QSO/heure, projeté sur les 10 / 60 dernières min)',

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

@@ -515,6 +515,8 @@ export function GetWinkeyerSettings():Promise<main.WinkeyerSettings>;
 
 export function GetWinkeyerStatus():Promise<winkeyer.Status>;
 
+export function GetWorkedCallVariants():Promise<boolean>;
+
 export function GetYaesuState():Promise<cat.YaesuTXState>;
 
 export function HasBuiltinReferences(arg1:string):Promise<boolean>;
@@ -967,6 +969,8 @@ export function SetUltrabeamDirection(arg1:number):Promise<void>;
 
 export function SetWinkeyerTrace(arg1:boolean):Promise<void>;
 
+export function SetWorkedCallVariants(arg1:boolean):Promise<void>;
+
 export function SetYaesuAFGain(arg1:number):Promise<void>;
 
 export function SetYaesuAGC(arg1:string):Promise<void>;

frontend/wailsjs/go/main/App.js

@@ -978,6 +978,10 @@ export function GetWinkeyerStatus() {
   return window['go']['main']['App']['GetWinkeyerStatus']();
 }
 
+export function GetWorkedCallVariants() {
+  return window['go']['main']['App']['GetWorkedCallVariants']();
+}
+
 export function GetYaesuState() {
   return window['go']['main']['App']['GetYaesuState']();
 }
@@ -1882,6 +1886,10 @@ export function SetWinkeyerTrace(arg1) {
   return window['go']['main']['App']['SetWinkeyerTrace'](arg1);
 }
 
+export function SetWorkedCallVariants(arg1) {
+  return window['go']['main']['App']['SetWorkedCallVariants'](arg1);
+}
+
 export function SetYaesuAFGain(arg1) {
   return window['go']['main']['App']['SetYaesuAFGain'](arg1);
 }