feat: Live cookie banner overlay in SDK — auto-open + FAB reopen button

- CookieBannerOverlay: opens automatically on first visit (localStorage check)
- CookieBannerFAB: shield icon button at right-[10rem] to reopen settings
- 3 consent modes: accept all, reject all (nur notwendige), custom settings
- 4 categories: Notwendig (locked on), Statistik, Marketing, Funktional
- Category toggles with descriptions in settings view
- Datenschutzerklaerung + Impressum links in banner
- Consent persisted to localStorage, custom event fired on change
- Comprehensive Playwright E2E tests (16 tests):
  - First visit auto-open, button visibility, category toggles
  - Accept all / reject all / custom settings persistence
  - FAB reopen behavior, disabled toggle for necessary category

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

admin-compliance/components/sdk/CookieBannerOverlay.tsx

@@ -0,0 +1,277 @@
+'use client'
+
+import { useState, useEffect, useCallback } from 'react'
+
+/**
+ * CookieBannerOverlay — Live cookie consent banner for the Compliance SDK.
+ *
+ * - Opens automatically on first visit (localStorage check)
+ * - Can be reopened via FAB button (right-[10rem])
+ * - Records consent choice to localStorage
+ * - Fires custom event 'sdkCookieConsentUpdated' for other components
+ */
+
+const STORAGE_KEY = 'bp-sdk-cookie-consent'
+
+interface ConsentState {
+  necessary: boolean
+  statistics: boolean
+  marketing: boolean
+  functional: boolean
+  timestamp: string
+}
+
+function getStoredConsent(): ConsentState | null {
+  if (typeof window === 'undefined') return null
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (!raw) return null
+    return JSON.parse(raw)
+  } catch {
+    return null
+  }
+}
+
+export function CookieBannerOverlay() {
+  const [isOpen, setIsOpen] = useState(false)
+  const [showSettings, setShowSettings] = useState(false)
+  const [consent, setConsent] = useState<ConsentState>({
+    necessary: true,
+    statistics: false,
+    marketing: false,
+    functional: false,
+    timestamp: '',
+  })
+
+  // Check on mount if consent was already given
+  useEffect(() => {
+    const stored = getStoredConsent()
+    if (!stored) {
+      // First visit — show banner
+      setIsOpen(true)
+    } else {
+      setConsent(stored)
+    }
+  }, [])
+
+  // Listen for reopen event from FAB button
+  useEffect(() => {
+    const handler = () => {
+      setIsOpen(true)
+      setShowSettings(true)
+    }
+    window.addEventListener('openCookieBanner', handler)
+    return () => window.removeEventListener('openCookieBanner', handler)
+  }, [])
+
+  const saveConsent = useCallback((state: ConsentState) => {
+    const withTimestamp = { ...state, timestamp: new Date().toISOString() }
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(withTimestamp))
+    setConsent(withTimestamp)
+    setIsOpen(false)
+    setShowSettings(false)
+    window.dispatchEvent(new CustomEvent('sdkCookieConsentUpdated', { detail: withTimestamp }))
+  }, [])
+
+  const handleAcceptAll = () => {
+    saveConsent({ necessary: true, statistics: true, marketing: true, functional: true, timestamp: '' })
+  }
+
+  const handleRejectAll = () => {
+    saveConsent({ necessary: true, statistics: false, marketing: false, functional: false, timestamp: '' })
+  }
+
+  const handleSaveSettings = () => {
+    saveConsent(consent)
+  }
+
+  if (!isOpen) return null
+
+  return (
+    <>
+      {/* Overlay */}
+      <div
+        className="fixed inset-0 bg-black/40 z-[9998] transition-opacity duration-300"
+        onClick={() => {/* Don't close on overlay click — consent is required */}}
+      />
+
+      {/* Banner */}
+      <div className="fixed bottom-0 left-0 right-0 z-[9999] animate-in slide-in-from-bottom duration-300">
+        <div className="max-w-3xl mx-auto m-4 bg-white rounded-2xl shadow-2xl border border-gray-200 overflow-hidden">
+          {/* Header */}
+          <div className="px-6 pt-6 pb-4">
+            <h2 className="text-lg font-semibold text-gray-900 flex items-center gap-2">
+              <svg className="w-5 h-5 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" />
+              </svg>
+              Cookie-Einstellungen
+            </h2>
+            <p className="text-sm text-gray-600 mt-2 leading-relaxed">
+              Wir verwenden Cookies und aehnliche Technologien, um Ihnen die bestmoegliche Erfahrung zu bieten.
+              Sie koennen Ihre Praeferenzen jederzeit aendern.
+            </p>
+            <div className="flex items-center gap-4 mt-2 text-xs text-gray-500">
+              <a href="/sdk/einwilligungen/cookie-banner" className="hover:text-purple-600 underline">
+                Datenschutzerklaerung
+              </a>
+              <span>|</span>
+              <a href="/sdk/einwilligungen" className="hover:text-purple-600 underline">
+                Impressum
+              </a>
+            </div>
+          </div>
+
+          {/* Category Settings (expandable) */}
+          {showSettings && (
+            <div className="px-6 pb-4 space-y-3 border-t border-gray-100 pt-4">
+              {/* Necessary — always on */}
+              <CategoryToggle
+                label="Notwendig"
+                description="Fuer die Grundfunktionen der Website erforderlich."
+                checked={true}
+                disabled={true}
+                onChange={() => {}}
+              />
+              <CategoryToggle
+                label="Statistik"
+                description="Helfen uns zu verstehen, wie Besucher mit der Website interagieren."
+                checked={consent.statistics}
+                onChange={(v) => setConsent(prev => ({ ...prev, statistics: v }))}
+              />
+              <CategoryToggle
+                label="Marketing"
+                description="Werden verwendet, um Besuchern relevante Werbung zu zeigen."
+                checked={consent.marketing}
+                onChange={(v) => setConsent(prev => ({ ...prev, marketing: v }))}
+              />
+              <CategoryToggle
+                label="Funktional"
+                description="Ermoeglichen erweiterte Funktionen und Personalisierung."
+                checked={consent.functional}
+                onChange={(v) => setConsent(prev => ({ ...prev, functional: v }))}
+              />
+            </div>
+          )}
+
+          {/* Buttons */}
+          <div className="px-6 py-4 bg-gray-50 border-t border-gray-100 flex flex-wrap items-center gap-3">
+            {!showSettings ? (
+              <>
+                <button
+                  onClick={handleAcceptAll}
+                  className="flex-1 min-w-[140px] px-4 py-2.5 bg-purple-600 text-white rounded-lg font-medium hover:bg-purple-700 transition-colors text-sm"
+                >
+                  Alle akzeptieren
+                </button>
+                <button
+                  onClick={handleRejectAll}
+                  className="flex-1 min-w-[140px] px-4 py-2.5 bg-gray-200 text-gray-700 rounded-lg font-medium hover:bg-gray-300 transition-colors text-sm"
+                >
+                  Nur notwendige
+                </button>
+                <button
+                  onClick={() => setShowSettings(true)}
+                  className="flex-1 min-w-[140px] px-4 py-2.5 border border-gray-300 text-gray-700 rounded-lg font-medium hover:bg-gray-100 transition-colors text-sm"
+                >
+                  Einstellungen
+                </button>
+              </>
+            ) : (
+              <>
+                <button
+                  onClick={handleSaveSettings}
+                  className="flex-1 min-w-[140px] px-4 py-2.5 bg-purple-600 text-white rounded-lg font-medium hover:bg-purple-700 transition-colors text-sm"
+                >
+                  Auswahl speichern
+                </button>
+                <button
+                  onClick={handleAcceptAll}
+                  className="flex-1 min-w-[140px] px-4 py-2.5 bg-gray-200 text-gray-700 rounded-lg font-medium hover:bg-gray-300 transition-colors text-sm"
+                >
+                  Alle akzeptieren
+                </button>
+                <button
+                  onClick={() => setShowSettings(false)}
+                  className="px-4 py-2.5 text-gray-500 hover:text-gray-700 text-sm"
+                >
+                  Zurueck
+                </button>
+              </>
+            )}
+          </div>
+        </div>
+      </div>
+    </>
+  )
+}
+
+
+/**
+ * FAB button to reopen the cookie banner settings.
+ * Positioned next to ComplianceAdvisor and PipelineSidebar.
+ */
+export function CookieBannerFAB() {
+  const [hasConsent, setHasConsent] = useState(false)
+
+  useEffect(() => {
+    setHasConsent(!!getStoredConsent())
+    const handler = () => setHasConsent(true)
+    window.addEventListener('sdkCookieConsentUpdated', handler)
+    return () => window.removeEventListener('sdkCookieConsentUpdated', handler)
+  }, [])
+
+  // Only show FAB after consent was given (banner is closed)
+  if (!hasConsent) return null
+
+  return (
+    <button
+      onClick={() => window.dispatchEvent(new Event('openCookieBanner'))}
+      className="fixed bottom-6 right-[10rem] w-14 h-14 bg-gray-700 hover:bg-gray-800 text-white rounded-full shadow-lg flex items-center justify-center transition-all duration-200 hover:scale-110 z-50"
+      aria-label="Cookie-Einstellungen oeffnen"
+      title="Cookie-Einstellungen"
+    >
+      <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" />
+      </svg>
+    </button>
+  )
+}
+
+
+function CategoryToggle({
+  label,
+  description,
+  checked,
+  disabled,
+  onChange,
+}: {
+  label: string
+  description: string
+  checked: boolean
+  disabled?: boolean
+  onChange: (v: boolean) => void
+}) {
+  return (
+    <div className="flex items-start justify-between gap-4 py-2">
+      <div className="flex-1">
+        <div className="text-sm font-medium text-gray-900">{label}</div>
+        <div className="text-xs text-gray-500 mt-0.5">{description}</div>
+      </div>
+      <button
+        onClick={() => !disabled && onChange(!checked)}
+        disabled={disabled}
+        className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors shrink-0 ${
+          checked
+            ? disabled ? 'bg-gray-400' : 'bg-purple-600'
+            : 'bg-gray-200'
+        } ${disabled ? 'cursor-not-allowed opacity-60' : 'cursor-pointer'}`}
+      >
+        <span
+          className={`inline-block h-4 w-4 transform rounded-full bg-white shadow-sm transition-transform ${
+            checked ? 'translate-x-6' : 'translate-x-1'
+          }`}
+        />
+      </button>
+    </div>
+  )
+}