fix: bug

frontend/src/components/StationControlPanel.tsx

@@ -99,8 +99,14 @@ type AntStatus = { enabled: boolean; type: string; connected: boolean; direction
 // only — per-element length adjustment. Heading/state is polled by the panel.
 function MotorAntennaWidget({ ant, refetch, t }: { ant: AntStatus; refetch: () => void; t: (k: string, v?: any) => string }) {
   const [err, setErr] = useState('');
-  const [elDraft, setElDraft] = useState<Record<number, string>>({});
+  const [elNum, setElNum] = useState('1');   // element to adjust (1..6)
+  const [elLen, setElLen] = useState('');    // target length (mm)
   const run = (p: Promise<any>) => p.then(refetch).catch((e) => setErr(String(e?.message ?? e)));
+  const setElement = () => {
+    const n = parseInt(elNum, 10), mm = parseInt(elLen, 10);
+    if (!Number.isFinite(n) || !Number.isFinite(mm)) return;
+    run(MotorSetElement(n - 1, mm)); // protocol elements are 0-based (0..5)
+  };
   const isUB = ant.type !== 'steppir';
   const dirs: [number, string][] = [[0, 'N'], [1, '180°'], [2, t('station.bi')]];
   return (
@@ -135,21 +141,27 @@ function MotorAntennaWidget({ ant, refetch, t }: { ant: AntStatus; refetch: () =
           <ArrowDownToLine className="size-3.5" /> {t('station.retract')}
         </button>
 
-        {isUB && ant.elements.length > 0 && (
+        {isUB && (
           <div>
             <div className="text-[10px] font-semibold uppercase tracking-wider text-muted-foreground mb-1">{t('station.elements')}</div>
-            <div className="space-y-1.5">
-              {ant.elements.map((mm, i) => (
-                <div key={i} className="flex items-center gap-2">
-                  <span className="text-xs w-14 shrink-0 text-muted-foreground">{t('station.element')} {i + 1}</span>
-                  <span className="text-xs font-mono w-14 tabular-nums">{mm} mm</span>
-                  <Input value={elDraft[i] ?? ''} placeholder={String(mm)} className="h-7 w-20 font-mono text-xs"
-                    onChange={(e) => setElDraft((d) => ({ ...d, [i]: e.target.value.replace(/[^0-9]/g, '') }))}
-                    onKeyDown={(e) => { if (e.key === 'Enter' && elDraft[i]) run(MotorSetElement(i, parseInt(elDraft[i], 10))); }} />
-                  <Button size="sm" variant="outline" className="h-7 px-2 text-[11px]" disabled={!elDraft[i]}
-                    onClick={() => run(MotorSetElement(i, parseInt(elDraft[i] || '0', 10)))}>{t('station.set')}</Button>
-                </div>
-              ))}
+            {ant.elements.length > 0 && (
+              <div className="flex flex-wrap gap-1 mb-1.5">
+                {ant.elements.map((mm, i) => (
+                  <span key={i} className="text-[10px] font-mono rounded bg-muted px-1.5 py-0.5">{t('station.element')} {i + 1}: {mm}mm</span>
+                ))}
+              </div>
+            )}
+            <div className="flex items-center gap-1.5">
+              <Select value={elNum} onValueChange={setElNum}>
+                <SelectTrigger className="h-8 w-28"><SelectValue /></SelectTrigger>
+                <SelectContent>
+                  {[1, 2, 3, 4, 5, 6].map((n) => <SelectItem key={n} value={String(n)}>{t('station.element')} {n}</SelectItem>)}
+                </SelectContent>
+              </Select>
+              <Input value={elLen} placeholder="mm" className="h-8 w-20 font-mono text-sm" disabled={!ant.connected}
+                onChange={(e) => setElLen(e.target.value.replace(/[^0-9]/g, ''))}
+                onKeyDown={(e) => { if (e.key === 'Enter') setElement(); }} />
+              <Button size="sm" className="h-8" disabled={!ant.connected || !elLen} onClick={setElement}>{t('station.set')}</Button>
             </div>
             <p className="text-[10px] text-muted-foreground mt-1">{t('station.elementsHint')}</p>
           </div>