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/app/sdk/layout.tsx

@@ -7,6 +7,7 @@ import { SDKSidebar } from '@/components/sdk/Sidebar/SDKSidebar'
 import { CommandBar } from '@/components/sdk/CommandBar'
 import { SDKPipelineSidebar } from '@/components/sdk/SDKPipelineSidebar'
 import { ComplianceAdvisorWidget } from '@/components/sdk/ComplianceAdvisorWidget'
+import { CookieBannerOverlay, CookieBannerFAB } from '@/components/sdk/CookieBannerOverlay'
 import { useSDK } from '@/lib/sdk'
 
 // =============================================================================
@@ -208,10 +209,14 @@ function SDKInnerLayout({ children }: { children: React.ReactNode }) {
       {isCommandBarOpen && <CommandBar onClose={() => setCommandBarOpen(false)} />}
 
       {/* Pipeline Sidebar (FAB on mobile/tablet, fixed on desktop xl+) */}
-      {projectId && <SDKPipelineSidebar />}
+      <SDKPipelineSidebar />
 
-      {/* Compliance Advisor Widget */}
-      {projectId && <ComplianceAdvisorWidget currentStep={currentStep} />}
+      {/* Compliance Advisor Widget — immer sichtbar, auch ohne Projekt */}
+      <ComplianceAdvisorWidget currentStep={currentStep} />
+
+      {/* Cookie Banner — opens on first visit, reopenable via FAB */}
+      <CookieBannerOverlay />
+      <CookieBannerFAB />
     </div>
   )
 }