fix(qsl): separate the QSL manager from the routing method (#16)

QSL_VIA is the manager. QSL_SENT_VIA and QSL_RCVD_VIA are the ADIF "QSL Via"
enumeration — B bureau, D direct, E electronic, M manager (import-only) —
and say how a card travelled. OpsLog had one column for all three:

  - the import folded QSL_SENT_VIA into QSL_VIA whenever QSL_VIA was empty,
    which is exactly a Log4OM export (it defaults QSL_SENT_VIA to E), so
    OE6CLD saw "E" everywhere OpsLog shows the manager;
  - QSL_RCVD_VIA was listed in adifPromoted with no column behind it, so it
    was not stored, not kept among the extras, and not exported — dropped
    outright on import;
  - neither was ever written on export, so an import followed by an export
    destroyed both;
  - and OpsLog polluted the field itself: the QSL Manager panel wrote
    "Bureau" / "Direct" / "Electronic", in full words, into QSL_VIA.

Two columns added (migration 0027), carried through the five places a
promoted ADIF field has to touch, with round-trip tests pinning the reported
case. The QSL panel now offers Bureau / Direct / Electronic for each
direction and stores the enumeration; the manager field is labelled as the
manager and holds only that. M is kept when a file gives it and never
written back out.

Existing logs hold a mixture of the two in one column. The repair is offered,
not performed: the count is shown once per log with a plain question, and a
"no" is remembered. It moves only where QSL_SENT_VIA is still empty, and only
values that normalise to the enumeration — a manager is a callsign and can
never be one of those six words, which a test pins against real manager calls.

frontend/src/App.tsx

@@ -52,6 +52,7 @@ import {
   GetAmpStatuses, AmpOperate,
   GetFlexState, FlexAmpOperate,
   GetPSKReporterStatus, GetLiveOpenings,
+  QSLViaRepairStatus, RepairQSLVia, DismissQSLViaRepair,
 } from '../wailsjs/go/main/App';
 import { Combobox } from '@/components/ui/combobox';
 import { applyAwardRefs } from '@/lib/awardRefs';
@@ -1793,6 +1794,20 @@ export default function App() {
   // close so the next plain "Preferences" launch reverts to default.
   const [settingsSection, setSettingsSection] = useState<string | undefined>(undefined);
   const [showDeleteAll, setShowDeleteAll] = useState(false);
+  // How many QSOs hold a QSL routing word where the manager belongs — null when
+  // there is nothing to offer, or the operator has already answered. Asked once
+  // per log, a moment after startup so it does not race the first paint.
+  const [qslViaRepair, setQslViaRepair] = useState<number | null>(null);
+  useEffect(() => {
+    let alive = true;
+    const id = window.setTimeout(async () => {
+      try {
+        const s: any = await QSLViaRepairStatus();
+        if (alive && !s?.asked && (s?.affected ?? 0) > 0) setQslViaRepair(s.affected);
+      } catch { /* a log we cannot query yet will be offered next start */ }
+    }, 4000);
+    return () => { alive = false; window.clearTimeout(id); };
+  }, []);
   const [showAbout, setShowAbout] = useState(false);
   // "What's new": the changelog for the version(s) since the operator last ran,
   // shown once on the first launch after an update (EN/FR per the UI language).
@@ -7275,6 +7290,27 @@ export default function App() {
           />
         );
       })()}
+      {/* One-time offer to move QSL routing words out of the manager field.
+          Shown with a count and never acted on without an answer: it rewrites
+          what the operator sees in their own log. Either answer is final —
+          asking again after a "no" would be a nag. */}
+      {qslViaRepair !== null && (
+        <ConfirmDialog
+          title={t('qslvia.title')}
+          message={t('qslvia.body', { n: qslViaRepair.toLocaleString() })}
+          confirmLabel={t('qslvia.confirm')}
+          cancelLabel={t('qslvia.cancel')}
+          onConfirm={async () => {
+            const n = qslViaRepair;
+            setQslViaRepair(null);
+            try {
+              const r: any = await RepairQSLVia();
+              showToast(t('qslvia.done', { n: (r?.moved ?? n).toLocaleString() }));
+            } catch { /* the log keeps the reason; nothing to undo */ }
+          }}
+          onCancel={() => { setQslViaRepair(null); DismissQSLViaRepair().catch(() => {}); }}
+        />
+      )}
       {showDeleteAll && (
         <ConfirmDialog
           title="Delete ALL QSOs?"