revert(icom): drop the PTT+split strip — MOX and SPLIT already live below

Added on a report that they were missing; they were below the fold, not
absent. The useful parts stay: the MOX button routes the PC microphone on a
network station, split aligns the TX VFO's mode, and SetIcomSplitOffset
remains available for a future use.

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, IcomConsolePTT,
+  IcomSetRFPower, IcomSetMicGain, IcomSetSplit, IcomTune, IcomConsolePTT,
   GetCATState, SetCATFrequency, SetCATMode,
   IcomSetRIT, IcomSetRITOn, IcomSetXITOn,
   IcomSetAntenna, IcomSetPBTInner, IcomSetPBTOuter, IcomSetManualNotch, IcomSetNotchPos,
@@ -508,29 +508,6 @@ export function IcomPanel({ onReportRST, isNetwork = false }: { onReportRST?: (r
             );
           })}
         </div>
-        {/* PTT + split, at the operator's hand under the dial — the Transmit
-            card lower down kept these below the fold, and a console whose PTT
-            needs scrolling is not a console. */}
-        <div className="flex items-center gap-1.5 border-t border-border/60 px-2 py-1.5">
-          <button type="button" onClick={toggleMox}
-            className={cn('flex-1 px-3 py-1.5 rounded-md text-xs font-black tracking-wider border transition-colors',
-              tx ? 'bg-destructive border-destructive text-destructive-foreground animate-pulse' : 'bg-card text-foreground border-border hover:bg-muted')}>
-            {tx ? 'TX ON' : 'PTT'}
-          </button>
-          <span className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground pl-1">Split</span>
-          <button type="button" onClick={() => set({ split: false }, () => IcomSetSplit(false))}
-            className={cn('px-2 py-1.5 rounded-md text-[11px] font-bold border transition-colors',
-              !st.split ? 'bg-primary text-primary-foreground border-primary' : 'bg-card text-muted-foreground border-border hover:bg-muted')}>
-            OFF
-          </button>
-          {[1, 5, 10].map((k) => (
-            <button key={k} type="button" onClick={() => set({ split: true }, () => IcomSetSplitOffset(k * 1000))}
-              className={cn('px-2 py-1.5 rounded-md text-[11px] font-bold border transition-colors',
-                st.split ? 'bg-card text-foreground border-border hover:bg-muted' : 'bg-card text-muted-foreground border-border hover:bg-muted')}>
-              +{k}k
-            </button>
-          ))}
-        </div>
       </div>
 
       {/* Live meters — always visible: S (RX, click → RST), Po in watts, SWR. */}