fix(icom): the console PTT carries the microphone on a network station

Keying alone is right on USB, where the operator talks into the radio's own
mic; over the LAN it transmitted silence. The console button now goes through
one binding that picks the road: network To-radio → the same key-and-stream
path as the Talk button, USB → key and nothing more.

frontend/src/components/IcomPanel.tsx

@@ -5,7 +5,7 @@ import {
   IcomSetAFGain, IcomSetRFGain, IcomSetNB, IcomSetNBLevel, IcomSetNR, IcomSetNRLevel,
   IcomSetANF, IcomSetAPF, IcomSetAGC, IcomSetPreamp, IcomSetAtt, IcomSetFilter,
   AudioMonitorActive, AudioStartMonitor, AudioStopMonitor,
-  IcomSetRFPower, IcomSetMicGain, IcomSetSplit, IcomSetSplitOffset, IcomTune, IcomSetPTT,
+  IcomSetRFPower, IcomSetMicGain, IcomSetSplit, IcomSetSplitOffset, IcomTune, IcomConsolePTT,
   IcomSetScope, IcomScopeData, IcomSetScopeMode, IcomSetScopeEdges, GetCATState, SetCATFrequency, SetCATMode,
   IcomSetRIT, IcomSetRITOn, IcomSetXITOn,
   IcomSetAntenna, IcomSetPBTInner, IcomSetPBTOuter, IcomSetManualNotch, IcomSetNotchPos,
@@ -649,7 +649,9 @@ export function IcomPanel({ onReportRST, isNetwork = false }: { onReportRST?: (r
   const toggleMox = () => {
     const next = !txRef.current;
     txRef.current = next;
-    set({ transmitting: next }, () => IcomSetPTT(next));
+    // Through the console binding: on a network station the PC microphone
+    // rides with the PTT (silence otherwise); on USB it keys and nothing more.
+    set({ transmitting: next }, () => IcomConsolePTT(next));
   };
 
   const tune = async () => {