fix(amp): the KPA was missing from the status-bar chip

The chip read a.spe ?? a.acom ?? a.pgxl, so a KPA fell through to the
not-connected fallback: red on a working amplifier, and a click that opened the
settings instead of switching to STANDBY. Reported from a KPA500 whose panel
showed band, SWR and temperature at the same time.

The card's offline text also borrowed the Acom's string, so a KPA that dropped
its link announced itself as an Acom.

frontend/src/components/AmpCard.tsx

@@ -194,7 +194,7 @@ export function AmpCard({ amp, flex, t }: { amp: Amp; flex: any; t: (k: string,
           </div>
           <span className={cn('inline-flex items-center gap-1.5 text-sm', kpa.connected ? 'text-muted-foreground' : 'text-danger')}>
             <span className={cn('size-2 rounded-full', kpa.connected ? 'bg-success' : 'bg-danger')} />
-            {kpa.connected ? (kpa.tuning ? t('flxp.kpaTuning') : (kpa.power_on ? 'ON' : 'OFF')) : t('flxp.acomOffline')}
+            {kpa.connected ? (kpa.tuning ? t('flxp.kpaTuning') : (kpa.power_on ? 'ON' : 'OFF')) : t('flxp.kpaOffline')}
           </span>
           {kpa.connected && (
             <span className="text-sm font-mono text-muted-foreground tabular-nums">