feat: KI-Agent toggle in all 3 check tabs

- Impressum-Check: Toggle activates 75 Impressum MCs via agent
- Banner-Check: Toggle runs additional cookie doc-check (381 MCs)
  after the Playwright banner test completes
- Both use the same use_agent flag through doc-check endpoint

Green pill button consistent across all tabs:
'KI-Agent aus' / 'KI-Agent aktiv (X MCs)'

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/app/sdk/agent/_components/ImpressumCheckTab.tsx

@@ -25,6 +25,8 @@ export function ImpressumCheckTab() {
     try { return JSON.parse(localStorage.getItem('impressum-check-history') || '[]') } catch { return [] }
   })
 
+  const [useAgent, setUseAgent] = useState(false)
+
   React.useEffect(() => { localStorage.setItem('impressum-check-url', url) }, [url])
 
   const handleSubmit = async (e: React.FormEvent) => {
@@ -43,6 +45,7 @@ export function ImpressumCheckTab() {
         body: JSON.stringify({
           entries: [{ doc_type: 'impressum', label: 'Impressum', url: url.trim() }],
           recipient: 'dsb@breakpilot.local',
+          use_agent: useAgent,
         }),
       })
       if (!startRes.ok) throw new Error(`Fehler: ${startRes.status}`)
@@ -91,6 +94,16 @@ export function ImpressumCheckTab() {
         </p>
       </div>
 
+      <div className="flex items-center gap-3">
+        <button type="button" onClick={() => setUseAgent(!useAgent)}
+          className={`flex items-center gap-2 px-3 py-1.5 rounded-full text-xs font-medium border transition-colors ${
+            useAgent ? 'bg-emerald-100 border-emerald-300 text-emerald-800' : 'bg-gray-50 border-gray-200 text-gray-500 hover:bg-gray-100'
+          }`}>
+          <span className={`w-2 h-2 rounded-full ${useAgent ? 'bg-emerald-500' : 'bg-gray-300'}`} />
+          {useAgent ? 'KI-Agent aktiv (75 MCs)' : 'KI-Agent aus'}
+        </button>
+      </div>
+
       <form onSubmit={handleSubmit} className="flex gap-3">
         <input type="url" value={url} onChange={e => setUrl(e.target.value)}
           placeholder="https://www.example.com/impressum"