fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

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

admin-v2/app/(admin)/education/companion/page.tsx

@@ -0,0 +1,76 @@
+'use client'
+
+import { Suspense } from 'react'
+import { PagePurpose } from '@/components/common/PagePurpose'
+import { getModuleByHref } from '@/lib/navigation'
+import { CompanionDashboard } from '@/components/companion/CompanionDashboard'
+import { GraduationCap } from 'lucide-react'
+
+function LoadingFallback() {
+  return (
+    <div className="space-y-6">
+      {/* Header Skeleton */}
+      <div className="flex items-center justify-between">
+        <div className="h-12 w-80 bg-slate-200 rounded-xl animate-pulse" />
+        <div className="flex gap-2">
+          {[1, 2, 3, 4].map((i) => (
+            <div key={i} className="h-10 w-10 bg-slate-200 rounded-lg animate-pulse" />
+          ))}
+        </div>
+      </div>
+
+      {/* Phase Timeline Skeleton */}
+      <div className="bg-white border border-slate-200 rounded-xl p-6">
+        <div className="h-4 w-24 bg-slate-200 rounded mb-4 animate-pulse" />
+        <div className="flex gap-4">
+          {[1, 2, 3, 4, 5].map((i) => (
+            <div key={i} className="flex items-center gap-2">
+              <div className="w-10 h-10 bg-slate-200 rounded-full animate-pulse" />
+              {i < 5 && <div className="w-8 h-1 bg-slate-200 animate-pulse" />}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      {/* Stats Skeleton */}
+      <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+        {[1, 2, 3, 4].map((i) => (
+          <div key={i} className="bg-white border border-slate-200 rounded-xl p-4">
+            <div className="h-4 w-16 bg-slate-200 rounded mb-2 animate-pulse" />
+            <div className="h-8 w-12 bg-slate-200 rounded animate-pulse" />
+          </div>
+        ))}
+      </div>
+
+      {/* Content Skeleton */}
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+        <div className="bg-white border border-slate-200 rounded-xl p-6 h-64 animate-pulse" />
+        <div className="bg-white border border-slate-200 rounded-xl p-6 h-64 animate-pulse" />
+      </div>
+    </div>
+  )
+}
+
+export default function CompanionPage() {
+  const moduleInfo = getModuleByHref('/education/companion')
+
+  return (
+    <div className="space-y-6">
+      {/* Page Purpose Header */}
+      {moduleInfo && (
+        <PagePurpose
+          title={moduleInfo.module.name}
+          purpose={moduleInfo.module.purpose}
+          audience={moduleInfo.module.audience}
+          collapsible={true}
+          defaultCollapsed={true}
+        />
+      )}
+
+      {/* Main Companion Dashboard */}
+      <Suspense fallback={<LoadingFallback />}>
+        <CompanionDashboard />
+      </Suspense>
+    </div>
+  )
+}