feat(qsl): HamQTH in the QSO editor's confirmation panel

The channel picker and the status table both list it now, sent only —
HamQTH publishes no confirmation feed, so its received column shows a
dash rather than an N that would read as 'not confirmed yet'. Backed by
the same APP_OPSLOG_HAMQTH_SENT extras the uploader stamps.

frontend/src/components/QSOEditModal.tsx

@@ -98,6 +98,15 @@ const HAMLOG_KEYS = {
   rcvdDate: 'APP_OPSLOG_HAMLOG_QSL_DATE',
 };
 
+// HamQTH — extras again (ADIF names no HamQTH field), and SENT only: the site
+// publishes no confirmation feed, so a received column here would be a promise
+// nothing can keep.
+const HAMQTH_CONF = 'HAMQTH';
+const HAMQTH_KEYS = {
+  sent: 'APP_OPSLOG_HAMQTH_SENT',
+  sentDate: 'APP_OPSLOG_HAMQTH_SENT_DATE',
+};
+
 // Colour-coded status cell for the confirmation grid.
 function StatusCell({ value }: { value?: string }) {
   const { t } = useI18n();
@@ -755,11 +764,22 @@ export function QSOEditModal({ qso, onSave, onDelete, onClose, countries = [], b
                                 to bind to. */}
                             <SelectItem value={OPSLOG_CONF}>{t('qedit.confOpsLog')}</SelectItem>
                             <SelectItem value={HAMLOG_CONF}>HAMLOG.online</SelectItem>
+                            <SelectItem value={HAMQTH_CONF}>HamQTH</SelectItem>
                           </SelectContent>
                         </Select>
                       </div>
 
-                      {confSel === HAMLOG_CONF ? (
+                      {confSel === HAMQTH_CONF ? (
+                        <>
+                          <div className="grid grid-cols-2 gap-3">
+                            <div><Label>{t('qedit.sent')}</Label><QslSelect value={exVal(HAMQTH_KEYS.sent)} onChange={(v) => exPut(HAMQTH_KEYS.sent, v)} /></div>
+                            <div><Label>{t('qedit.dateSent')}</Label><AdifDateInput value={exVal(HAMQTH_KEYS.sentDate)} onChange={(v) => exPut(HAMQTH_KEYS.sentDate, v)} /></div>
+                          </div>
+                          <p className="text-[11px] text-muted-foreground">
+                            {t('qedit.qslPanelHint')} <strong>{t('qedit.saveChanges')}</strong>.
+                          </p>
+                        </>
+                      ) : confSel === HAMLOG_CONF ? (
                         <>
                           <div className="grid grid-cols-2 gap-3">
                             <div><Label>{t('qedit.sent')}</Label><QslSelect value={exVal(HAMLOG_KEYS.sent)} onChange={(v) => exPut(HAMLOG_KEYS.sent, v)} /></div>
@@ -869,6 +889,13 @@ export function QSOEditModal({ qso, onSave, onDelete, onClose, countries = [], b
                             <td className="w-24"><StatusCell value={exVal(HAMLOG_KEYS.sent)} /></td>
                             <td className="w-24"><StatusCell value={exVal(HAMLOG_KEYS.rcvd)} /></td>
                           </tr>
+                          {/* HamQTH — sent only; the dash says there is nothing
+                              to receive, not that nothing was received. */}
+                          <tr className="text-xs">
+                            <td className="font-medium pr-3 py-0.5 whitespace-nowrap">HamQTH</td>
+                            <td className="w-24"><StatusCell value={exVal(HAMQTH_KEYS.sent)} /></td>
+                            <td className="w-24"><span className="block text-center text-[11px] text-muted-foreground">—</span></td>
+                          </tr>
                         </tbody>
                       </table>
                     </div>