feat: Management of multiple slices on Flexradio

app.go

@@ -8270,6 +8270,22 @@ func (a *App) FlexSetSplit(on bool) error {
 	return a.cat.FlexDo(func(fc cat.FlexController) error { return fc.SetSplit(on) })
 }
 
+// FlexSetActiveSlice focuses a slice (A/B/C/D…) so all commands target it.
+func (a *App) FlexSetActiveSlice(idx int) error {
+	if a.cat == nil {
+		return fmt.Errorf("cat not initialized")
+	}
+	return a.cat.FlexDo(func(fc cat.FlexController) error { return fc.SetActiveSlice(idx) })
+}
+
+// FlexSetTXSlice makes a slice the transmitter (e.g. TX on the active slice).
+func (a *App) FlexSetTXSlice(idx int) error {
+	if a.cat == nil {
+		return fmt.Errorf("cat not initialized")
+	}
+	return a.cat.FlexDo(func(fc cat.FlexController) error { return fc.SetTXSlice(idx) })
+}
+
 // keyFlexBandAnt stores the per-band RX/TX antenna map (global, machine-local).
 const keyFlexBandAnt = "flex.band_antennas"