refactor(admin): split dsr/new, compliance-hub, iace/monitoring, cookie-banner pages

Extract components and hooks from 4 oversized pages (518–508 LOC each) to bring
each page.tsx under 300 LOC (hard cap 500). Zero behavior changes.

- dsr/new: TypeSelector, SourceSelector → _components/; useNewDSRForm → _hooks/
- compliance-hub: QuickActions, StatsRow, DomainChart, MappingsAndFindings,
  RegulationsTable → _components/; useComplianceHub → _hooks/
- iace/[projectId]/monitoring: Badges, EventForm, ResolveModal, TimelineEvent →
  _components/; useMonitoring → _hooks/
- cookie-banner: BannerPreview, CategoryCard → _components/; useCookieBanner → _hooks/

Result: page.tsx LOC: dsr/new=259, compliance-hub=95, monitoring=157, cookie-banner=212

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

admin-compliance/app/sdk/cookie-banner/_components/BannerPreview.tsx

@@ -0,0 +1,50 @@
+'use client'
+
+import { BannerConfig, BannerTexts, CookieCategory } from '../_hooks/useCookieBanner'
+
+export function BannerPreview({
+  config,
+  categories,
+  bannerTexts,
+}: {
+  config: BannerConfig
+  categories: CookieCategory[]
+  bannerTexts: BannerTexts
+}) {
+  return (
+    <div className="relative bg-gray-100 rounded-xl p-8 min-h-64 flex items-end justify-center">
+      <div className="absolute inset-0 flex items-center justify-center text-gray-400 text-sm">
+        Website-Vorschau
+      </div>
+      <div
+        className={`w-full max-w-2xl bg-white rounded-xl shadow-xl p-6 border-2 ${
+          config.position === 'center' ? 'absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2' : ''
+        }`}
+        style={{ borderColor: config.primaryColor }}
+      >
+        <h4 className="font-semibold text-gray-900">{bannerTexts.title}</h4>
+        <p className="text-sm text-gray-600 mt-2">
+          {bannerTexts.description}
+        </p>
+        <div className="mt-4 flex items-center gap-3">
+          <button
+            className="px-4 py-2 rounded-lg text-white text-sm font-medium"
+            style={{ backgroundColor: config.primaryColor }}
+          >
+            Alle akzeptieren
+          </button>
+          {config.showDeclineAll && (
+            <button className="px-4 py-2 rounded-lg border border-gray-300 text-gray-700 text-sm font-medium">
+              Alle ablehnen
+            </button>
+          )}
+          {config.showSettings && (
+            <button className="px-4 py-2 text-sm text-gray-600 hover:underline">
+              Einstellungen
+            </button>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}