fix(watchlist): the auto-contest FIELD — the backend shipped without its UI

The wiring script died on an app.go anchor mid-run: the backend half was
committed, the frontend half (the pattern field, the changed-event refresh, the
i18n keys) never ran. Replayed; the field sits after Add.

frontend/src/components/WatchlistTab.tsx

@@ -20,7 +20,9 @@ import { useI18n } from '@/lib/i18n';
 import {
   WatchlistEntries, WatchlistAdd, WatchlistRemove, WatchlistSetNotify,
   WatchlistSetContest, WatchlistWorkedSlots,
+  GetWatchlistContestPattern, SetWatchlistContestPattern,
 } from '../../wailsjs/go/main/App';
+import { EventsOn } from '../../wailsjs/runtime/runtime';
 import type { ClusterSpot, SpotStatusEntry } from '@/components/ClusterGrid';
 import { inferSpotMode, spotStatusKey } from '@/lib/spot';
 
@@ -72,7 +74,18 @@ export function WatchlistTab({ spots, spotStatus, onSpotSelect, onSpotClick }: P
     try { setEntries(((await WatchlistEntries()) ?? []) as any as WLEntry[]); }
     catch (e: any) { setError(String(e?.message ?? e)); }
   }, []);
-  useEffect(() => { void refresh(); }, [refresh]);
+  // Refreshed on mount, when the backend auto-adds (event), and on a slow tick
+  // so last-seen and the spot counters stay honest while the tab sits open.
+  useEffect(() => {
+    void refresh();
+    const off = EventsOn('watchlist:changed', () => { void refresh(); });
+    const id = window.setInterval(() => { void refresh(); }, 30_000);
+    return () => { off(); window.clearInterval(id); };
+  }, [refresh]);
+  // The auto-contest pattern (DXHunter's contest_prefix): spots whose call
+  // contains it are added as contest entries by the backend.
+  const [pattern, setPattern] = useState('');
+  useEffect(() => { GetWatchlistContestPattern().then((p: string) => setPattern(p ?? '')).catch(() => {}); }, []);
 
   // Live spots per entry — prefix-matched, newest first, deduped per band+mode
   // (one line per slot; the freshest spot represents it).
@@ -191,6 +204,11 @@ export function WatchlistTab({ spots, spotStatus, onSpotSelect, onSpotClick }: P
         <Button size="sm" className="h-8" onClick={() => void add()} disabled={!addCall.trim()}>
           <Plus className="size-3.5" /> {t('wl.add')}
         </Button>
+        <Input className="h-8 w-28 font-mono uppercase" placeholder={t('wl.patternPh')}
+          title={t('wl.patternHint')}
+          value={pattern}
+          onChange={(e) => setPattern(e.target.value.toUpperCase())}
+          onBlur={() => { void SetWatchlistContestPattern(pattern.trim()); }} />
         <div className="flex-1" />
         <div className="relative">
           <Search className="size-3.5 absolute left-2 top-1/2 -translate-y-1/2 text-muted-foreground" />

frontend/src/lib/i18n.tsx

@@ -39,7 +39,7 @@ const en: Dict = {
   'cwd.tipOnIdle': 'CW decoder — on, idle until CW mode · click to disable',
   'cwd.tipOff': 'CW decoder · click to enable (decodes RX audio in CW mode)',
   'tools.watchlist': 'Watchlist…', 'tab.watchlist': 'Watchlist',
-  'wl.addPh': 'Callsign or prefix', 'wl.add': 'Add', 'wl.contest': 'Contest', 'wl.addAsContest': 'as contest',
+  'wl.addPh': 'Callsign or prefix', 'wl.add': 'Add', 'wl.contest': 'Contest', 'wl.addAsContest': 'as contest', 'wl.patternPh': 'Auto (WWA)', 'wl.patternHint': 'Auto-add as contest: any spotted callsign CONTAINING this text joins the watchlist as a contest entry by itself. Empty = off; collected entries stay.',
   'wl.contestHint': 'Contest station: worked/needed is judged against the current UTC day — at 00:00 UTC every slot can be worked again.',
   'wl.searchPh': 'Search…', 'wl.famAll': 'All', 'wl.famNormal': 'DX', 'wl.famContest': 'Contest',
   'wl.activeOnly': 'Active only', 'wl.neededOnly': 'Needed only',
@@ -563,7 +563,7 @@ const fr: Dict = {
   'cwd.tipOnIdle': 'Décodeur CW — actif, en veille hors mode CW · clic pour désactiver',
   'cwd.tipOff': 'Décodeur CW · clic pour activer (décode l’audio RX en mode CW)',
   'tools.watchlist': 'Watchlist…', 'tab.watchlist': 'Watchlist',
-  'wl.addPh': 'Indicatif ou préfixe', 'wl.add': 'Ajouter', 'wl.contest': 'Contest', 'wl.addAsContest': 'comme contest',
+  'wl.addPh': 'Indicatif ou préfixe', 'wl.add': 'Ajouter', 'wl.contest': 'Contest', 'wl.addAsContest': 'comme contest', 'wl.patternPh': 'Auto (WWA)', 'wl.patternHint': "Ajout auto comme contest : tout indicatif spotté CONTENANT ce texte rejoint la watchlist en entrée contest tout seul. Vide = désactivé ; les entrées déjà collectées restent.",
   'wl.contestHint': "Station contest : contacté/manquant est jugé sur la journée UTC courante — à 00:00 UTC chaque créneau redevient à faire.",
   'wl.searchPh': 'Chercher…', 'wl.famAll': 'Tous', 'wl.famNormal': 'DX', 'wl.famContest': 'Contest',
   'wl.activeOnly': 'Actifs seulement', 'wl.neededOnly': 'Manquants seulement',