horn button light up

webui/src/components/CameraServoPanel.jsx

@@ -13,7 +13,7 @@ function formatDegrees(value) {
 
 export default function CameraServoPanel() {
   const {
-    state: { roverId, camera, keymap },
+    state: { roverId, camera, keymap, horn },
     pipeline,
     actions: { setServoAngle, nudgeServo, goServoHome, setNightVision, startHorn, stopHorn },
   } = useControlSystem();
@@ -110,6 +110,7 @@ export default function CameraServoPanel() {
           onStart={startHorn}
           onStop={stopHorn}
           keyLabel={hornKey}
+          active={horn?.active}
         />
       )}
       {enabled && (

webui/src/components/ControlSummary.jsx

@@ -75,7 +75,7 @@ export default function ControlSummary() {
 
 export function InlineCameraTilt({ keymap }) {
   const {
-    state: { roverId, camera },
+    state: { roverId, camera, horn },
     pipeline,
     actions: { setServoAngle, setNightVision, startHorn, stopHorn },
   } = useControlSystem();
@@ -132,7 +132,13 @@ export function InlineCameraTilt({ keymap }) {
         />
       )}
       {hornAvailable && (
-        <HornControl disabled={!roverId} onStart={startHorn} onStop={stopHorn} keyLabel={hornLabel} />
+        <HornControl
+          disabled={!roverId}
+          onStart={startHorn}
+          onStop={stopHorn}
+          keyLabel={hornLabel}
+          active={horn?.active}
+        />
       )}
       {enabled && (
         <div className="space-y-0.5 px-1 py-1">

webui/src/components/HornControl.jsx

@@ -14,6 +14,7 @@ export default function HornControl({
   onStart,
   onStop,
   keyLabel,
+  active,
   className = '',
 }) {
   const [pressed, setPressed] = useState(false);
@@ -34,15 +35,16 @@ export default function HornControl({
     }
   }, [hornSettings?.freqs, hornSettings?.waveform]);
 
+  const isActive = Boolean(active);
   const buttonClasses = useMemo(() => {
     const base =
       'group flex w-full flex-col gap-0.5 rounded-xl border-2 px-1 py-1.5 text-xs font-semibold';
     const active = 'border-fuchsia-300/70 bg-fuchsia-700 text-fuchsia-50';
     const inactive = 'border-cyan-300/70 bg-cyan-900 text-cyan-50 hover:bg-cyan-800';
-    return [base, pressed ? active : inactive, 'disabled:opacity-50', className]
+    return [base, isActive ? active : inactive, 'disabled:opacity-50', className]
       .filter(Boolean)
       .join(' ');
-  }, [className, pressed]);
+  }, [className, isActive]);
 
   const start = () => {
     if (disabled) return;
@@ -120,10 +122,10 @@ export default function HornControl({
         </span>
         <span
           className={`rounded px-1 py-0.5 text-[0.65rem] font-semibold ${
-            pressed ? 'bg-fuchsia-200 text-fuchsia-900' : 'bg-slate-800 text-slate-200'
+            isActive ? 'bg-fuchsia-200 text-fuchsia-900' : 'bg-slate-800 text-slate-200'
           }`}
         >
-          {pressed ? 'Honk' : 'Hold'}
+          {isActive ? 'Honk' : 'Hold'}
         </span>
       </div>
       <div className="grid grid-cols-[minmax(0,1.2fr)_repeat(4,minmax(0,1fr))] items-center gap-0.5 text-[0.65rem]">

webui/src/components/MobileControls.jsx

@@ -134,7 +134,7 @@ function FloatingJoystick({ disabled, layout, radius, onMove, onStop }) {
 
 function MobileJoystickPanel({ layout }) {
   const {
-    state: { roverId, camera },
+    state: { roverId, camera, horn },
     pipeline,
     actions: { setDriveVector, registerInputState, setServoAngle, setNightVision, startHorn, stopHorn },
   } = useControlSystem();
@@ -226,7 +226,7 @@ function MobileJoystickPanel({ layout }) {
             />
           )}
           {hornAvailable && (
-            <HornControl disabled={disabled} onStart={startHorn} onStop={stopHorn} />
+            <HornControl disabled={disabled} onStart={startHorn} onStop={stopHorn} active={horn?.active} />
           )}
           {cameraEnabled && (
             <div className="bg-zinc-950 p-0.5 text-xs">