feat(watchlist): exact match by default, * for a family

The prefix matching ported from DXHunter swallowed too much: a three-letter
special-event entry N8W lit up NEEDED for N8WCR, a different station entirely.
The implicit becomes explicit — a bare entry matches exactly that call, a
trailing star makes it a family: VK9* catches every VK9…, RI0SP* the
expedition's portable forms. A star anywhere else (or alone) is refused at Add
rather than silently matching nothing. Same rule in the backend Match and the
tab's own matcher, pinned by test.

frontend/src/components/WatchlistTab.tsx

@@ -43,9 +43,16 @@ interface Props {
 // A spot is ON AIR for the badge while its last sighting is this fresh.
 const ON_AIR_MS = 10 * 60 * 1000;
 
+// Exact unless the entry carries a trailing * — the same rule the backend's
+// Match applies to the live stream, mirrored so the tab and the alerts can
+// never disagree about what an entry covers.
 function matchesEntry(call: string, pattern: string): boolean {
   const c = call.toUpperCase();
-  return c === pattern || c.startsWith(pattern);
+  if (pattern.endsWith('*')) {
+    const p = pattern.slice(0, -1);
+    return p !== '' && c.startsWith(p);
+  }
+  return c === pattern;
 }
 
 export function WatchlistTab({ spots, spotStatus, onSpotSelect, onSpotClick }: Props) {

frontend/src/lib/i18n.tsx

@@ -39,11 +39,11 @@ 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.cTotal': 'Watchlist:', 'wl.cActive': 'Active:', 'wl.cNeeded': 'Needed:', 'wl.allModes': 'All modes', 'wl.modeFilter': 'Only show spots in this mode', 'wl.patternPh': 'Auto contest (e.g. 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.addPh': 'Callsign or VK9*', 'wl.add': 'Add', 'wl.contest': 'Contest', 'wl.addAsContest': 'as contest', 'wl.cTotal': 'Watchlist:', 'wl.cActive': 'Active:', 'wl.cNeeded': 'Needed:', 'wl.allModes': 'All modes', 'wl.modeFilter': 'Only show spots in this mode', 'wl.patternPh': 'Auto contest (e.g. 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', 'wl.neededOnly': 'Needed',
-  'wl.empty': 'Add the callsigns or prefixes you are hunting — a prefix catches the portable forms too (RI0SP matches RI0SP/MM). Spots from the cluster appear under each entry with what they are worth.',
+  'wl.empty': 'Add the callsigns you are hunting. A bare entry matches exactly that call; end it with * for a family — VK9* catches every VK9…, RI0SP* the expedition\u2019s portable forms. Spots from the cluster appear under each entry with what they are worth.',
   'wl.noneMatch': 'Nothing matches the current filters.',
   'wl.onAir': 'ON AIR', 'wl.expedition': 'DXpedition',
   'wl.nNeeded': '{n} needed', 'wl.nToday': '{n} today', 'wl.allWorked': 'All worked', 'wl.workedToday': 'Worked today',
@@ -563,11 +563,11 @@ 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.cTotal': 'Watchlist :', 'wl.cActive': 'Actives :', 'wl.cNeeded': 'Manquantes :', 'wl.allModes': 'Tous les modes', 'wl.modeFilter': 'Ne montrer que les spots de ce mode', 'wl.patternPh': 'Auto contest (ex. 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.addPh': 'Indicatif ou VK9*', 'wl.add': 'Ajouter', 'wl.contest': 'Contest', 'wl.addAsContest': 'comme contest', 'wl.cTotal': 'Watchlist :', 'wl.cActive': 'Actives :', 'wl.cNeeded': 'Manquantes :', 'wl.allModes': 'Tous les modes', 'wl.modeFilter': 'Ne montrer que les spots de ce mode', 'wl.patternPh': 'Auto contest (ex. 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', 'wl.neededOnly': 'Manquants',
-  'wl.empty': "Ajoutez les indicatifs ou préfixes que vous chassez — un préfixe attrape aussi les formes portables (RI0SP matche RI0SP/MM). Les spots du cluster apparaissent sous chaque entrée avec ce qu'ils valent.",
+  'wl.empty': "Ajoutez les indicatifs que vous chassez. Une entrée nue matche exactement ce call ; terminez par * pour une famille — VK9* attrape tous les VK9…, RI0SP* les formes portables de l'expédition. Les spots du cluster apparaissent sous chaque entrée avec ce qu'ils valent.",
   'wl.noneMatch': 'Rien ne correspond aux filtres actuels.',
   'wl.onAir': 'ON AIR', 'wl.expedition': 'DXpédition',
   'wl.nNeeded': '{n} manquants', 'wl.nToday': "{n} aujourd'hui", 'wl.allWorked': 'Tout contacté', 'wl.workedToday': "Contacté aujourd'hui",