feat(clublog): the matches come home, and Club Log lends its call list

Two new QSO columns, clublog_qso_download_status/date — a Club Log MATCH,
the service's own confirmation (both stations uploaded the QSO, paired
within 15 minutes). Full promoted-column lockstep: migration 0031, repo
insert/scan, ADIF dictionary + import + export (app-defined
CLUBLOG_QSO_DOWNLOAD_*), table columns, filter builder, bulk edit and the
QSO editor's Club Log row.

The QSL Manager's Club Log entry now actually downloads: getmatches.php
with the existing account settings and the embedded application key,
incremental via the match-completion date filter, matched call+band+mode
±15 min with a mode-blind fallback because Club Log reports 'false' for
modes it cannot infer. Matches always exist on both sides, so unmatched
ones are listed rather than skeleton-added.

And Super Check Partial can merge Club Log's weekly SCP list (~180k calls
worked on the air in the last 3 years) with MASTER.SCP — an opt-in
checkbox under the SCP setting.

frontend/src/components/SettingsModal.tsx

@@ -49,7 +49,7 @@ import {
   GetPOTAToken, SavePOTAToken,
   TestLoTWUpload, ListTQSLStationLocations,
   DownloadLoTWUsers, GetLoTWUsersStatus,
-  GetScpStatus, SetScpEnabled, DownloadScp,
+  GetScpStatus, SetScpEnabled, SetScpClublogEnabled, DownloadScp,
   DownloadULSCounties, ULSStatus, BackfillUSCounties, BackfillRDA, RDADatabaseCount,
   GetCtyDatInfo, RefreshCtyDat, GetAwardReferenceMeta, UpdateAwardReferenceList,
   GetSpotColors, SaveSpotColors, ResetSpotColors, GetFlexZoom, SaveFlexZoom,
@@ -1884,6 +1884,7 @@ function SettingsModalImpl({ onClose, onSaved, initialSection, onMainPaneChanged
     try { await SetScpEnabled(on); const s = await GetScpStatus(); setScp(s as any); } catch {}
     finally { setScpBusy(false); }
   };
+  const refreshScp = async () => { try { const s = await GetScpStatus(); setScp(s as any); } catch {} };
   const downloadScp = async () => {
     setScpBusy(true);
     try { await DownloadScp(); const s = await GetScpStatus(); setScp(s as any); } catch {}
@@ -7306,6 +7307,13 @@ function SettingsModalImpl({ onClose, onSaved, initialSection, onMainPaneChanged
               <Checkbox checked={scp.enabled} disabled={scpBusy} onCheckedChange={(c) => toggleScp(!!c)} />
               {t('scp.enable')}
             </label>
+            {scp.enabled && (
+              <label className="flex items-center gap-2 text-sm cursor-pointer pl-6" title={t('scp.clublogHint')}>
+                <Checkbox checked={!!(scp as any).clublog} disabled={scpBusy}
+                  onCheckedChange={(c) => { void SetScpClublogEnabled(!!c).then(() => refreshScp()); }} />
+                {t('scp.clublog')}
+              </label>
+            )}
             {scp.enabled && (
               <div className="flex items-center gap-3">
                 <Button variant="outline" size="sm" onClick={downloadScp} disabled={scpBusy}>