fix(watchlist): remove on a single click, like the bell and trophy beside it

The two-click arm goes: removing an entry is cheap to undo (type it again), so
it does not earn a confirmation its neighbours do not have. The bin reddens on
hover and the green line confirms the removal.

frontend/src/components/WatchlistTab.tsx

@@ -94,7 +94,7 @@ export function WatchlistTab({ spots, spotStatus, onSpotSelect, onSpotClick }: P
     setNotice(isError ? '' : msg);
     noticeTimer.current = window.setTimeout(() => { setError(''); setNotice(''); }, 4000) as unknown as number;
   };
-  const [removeArm, setRemoveArm] = useState('');
+
   // worked answer per "call|band|modeclass|contest" key.
   const [worked, setWorked] = useState<Record<string, boolean>>({});
 
@@ -186,22 +186,11 @@ export function WatchlistTab({ spots, spotStatus, onSpotSelect, onSpotClick }: P
     } catch (e: any) { flash(String(e?.message ?? e), true); }
   };
 
-  // Armed through a REF, checked synchronously: the state variable is captured
+  // One click, like the bell and the trophy beside it: removing a watchlist
-  // at render time, so a quick double-click read the pre-arm value twice and
+  // entry is cheap to undo (type it again), so it does not earn a confirmation
-  // both clicks merely armed — the bin turned red and nothing was ever removed.
+  // the other two buttons do not have.
-  const removeArmRef = useRef('');
   const remove = async (call: string) => {
-    if (removeArmRef.current !== call) {
+    try { await WatchlistRemove(call); flash(t('wl.removed', { call }), false); await refresh(); }
-      removeArmRef.current = call;
-      setRemoveArm(call);
-      window.setTimeout(() => {
-        if (removeArmRef.current === call) { removeArmRef.current = ''; setRemoveArm(''); }
-      }, 3000);
-      return;
-    }
-    removeArmRef.current = '';
-    setRemoveArm('');
-    try { await WatchlistRemove(call); await refresh(); }
     catch (e: any) { flash(String(e?.message ?? e), true); }
   };
 
@@ -376,7 +365,7 @@ export function WatchlistTab({ spots, spotStatus, onSpotSelect, onSpotClick }: P
                 </button>
                 <button type="button" title={t('wl.remove')}
                   onClick={() => void remove(e.callsign)}
-                  className={cn('p-1 rounded hover:bg-muted', removeArm === e.callsign ? 'text-danger' : 'text-muted-foreground/40')}>
+                  className="p-1 rounded hover:bg-muted text-muted-foreground/40 hover:text-danger">
                   <Trash2 className="size-3.5" />
                 </button>
               </div>

frontend/src/lib/i18n.tsx

@@ -49,7 +49,7 @@ const en: Dict = {
   'wl.nNeeded': '{n} needed', 'wl.nToday': '{n} today', 'wl.allWorked': 'All worked', 'wl.workedToday': 'Worked today',
   'wl.totalSpots': '{n} spots', 'wl.toggleContest': 'Contest entry: judged per UTC day',
   'wl.notifyOn': 'Alert me when this station is spotted', 'wl.notifyOff': 'Stop alerting for this station',
-  'wl.remove': 'Remove (click twice)', 'wl.noSpots': 'No live spots',
+  'wl.remove': 'Remove', 'wl.removed': '{call} removed from the watchlist.', 'wl.noSpots': 'No live spots',
   'wl.newDxcc': 'NEW DXCC', 'wl.worked': 'Worked', 'wl.needed': 'Needed!', 'wl.todayOk': 'Today ✓', 'wl.workToday': 'Work today!',
   'wl.spotTip': 'Click: fill the callsign · double-click: tune and work',
   'tools.net': 'NET Control', 'tools.alerts': 'Alert management…', 'tools.contest': 'Contest mode',
@@ -573,7 +573,7 @@ const fr: Dict = {
   'wl.nNeeded': '{n} manquants', 'wl.nToday': "{n} aujourd'hui", 'wl.allWorked': 'Tout contacté', 'wl.workedToday': "Contacté aujourd'hui",
   'wl.totalSpots': '{n} spots', 'wl.toggleContest': 'Entrée contest : jugée par jour UTC',
   'wl.notifyOn': "M'alerter quand cette station est spottée", 'wl.notifyOff': "Ne plus alerter pour cette station",
-  'wl.remove': 'Supprimer (cliquer deux fois)', 'wl.noSpots': 'Aucun spot en cours',
+  'wl.remove': 'Supprimer', 'wl.removed': '{call} retiré de la watchlist.', 'wl.noSpots': 'Aucun spot en cours',
   'wl.newDxcc': 'NOUV DXCC', 'wl.worked': 'Contacté', 'wl.needed': 'Manquant !', 'wl.todayOk': "Auj. ✓", 'wl.workToday': "À faire auj. !",
   'wl.spotTip': "Clic : remplir l'indicatif · double-clic : régler la radio et travailler",
   'tools.net': 'Contrôle de NET', 'tools.alerts': 'Gestion des alertes…', 'tools.contest': 'Mode contest',