feat: type freq in RX freq will send the radio for Icom and Flex

frontend/src/App.tsx

@@ -2997,6 +2997,18 @@ export default function App() {
     </div>
   );
   // CQ/ITU zones moved to the Info (F2) tab (DetailsPanel).
+  // Type a frequency, press Enter → tune the radio there. Only when a rig is
+  // actually connected (these same fields are the manual-log entry when it isn't),
+  // and only on a plausible HF/VHF value so a half-typed "14." doesn't QSY the rig
+  // to 14 kHz. noteManualEdit() holds off the incoming poll so the field doesn't
+  // snap back before the radio's echo confirms the move.
+  const tuneRadioTo = (mhzStr: string) => {
+    if (!(catState.enabled && catState.connected)) return;
+    const mhz = parseFloat(mhzStr);
+    if (!Number.isFinite(mhz) || mhz < 0.1 || mhz > 3000) return;
+    noteManualEdit();
+    SetCATFrequency(Math.round(mhz * 1_000_000)).catch(() => {});
+  };
   const freqBlock = (
     <div className="flex flex-col w-32">
       <Label className="mb-1 h-3.5 flex items-center gap-1">{t('field.txFreq')} <LockBtn k="freq" title="frequency" /></Label>
@@ -3005,8 +3017,10 @@ export default function App() {
         className="font-mono"
         value={freqFocused ? freqMhz : (freqMhz ? fmtFreqDots(freqMhz) : '')}
         placeholder="14.250"
+        title={catState.connected ? t('field.freqTuneHint') : undefined}
         onFocus={() => setFreqFocused(true)}
         onBlur={() => setFreqFocused(false)}
+        onKeyDown={(e) => { if (e.key === 'Enter') tuneRadioTo(freqMhz); }}
         onChange={(e) => { setFreqMhz(e.target.value); noteManualEdit(); const b = bandForMHz(parseFloat(e.target.value)); if (b) setBand(b); }}
       />
     </div>
@@ -3018,8 +3032,10 @@ export default function App() {
         tabIndex={-1}
         value={freqFocused ? rxFreqMhz : (rxFreqMhz ? fmtFreqDots(rxFreqMhz) : '')}
         placeholder="14.255"
+        title={catState.connected ? t('field.freqTuneHint') : undefined}
         onFocus={() => setFreqFocused(true)}
         onBlur={() => setFreqFocused(false)}
+        onKeyDown={(e) => { if (e.key === 'Enter') tuneRadioTo(rxFreqMhz); }}
         onChange={(e) => { setRxFreqMhz(e.target.value); noteManualEdit(); const rb = bandForMHz(parseFloat(e.target.value)); if (rb) setBandRx(rb); }}
         className={cn('font-mono', catState.split && 'bg-danger-muted/40 border-danger-border focus:bg-card')}
       />