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/edu-search/page.tsx

@@ -5,9 +5,10 @@
  * Bildungsquellen und Crawler-Verwaltung
  */
 
-import { useState } from 'react'
+import { useState, useCallback } from 'react'
 import { PagePurpose } from '@/components/common/PagePurpose'
-import { Search, Database, RefreshCw, ExternalLink, FileText, BookOpen } from 'lucide-react'
+import { Search, Database, RefreshCw, ExternalLink, FileText, BookOpen, FolderOpen } from 'lucide-react'
+import { DokumenteTab } from '@/components/education/DokumenteTab'
 
 interface DataSource {
   id: string
@@ -42,7 +43,12 @@ const DATA_SOURCES: DataSource[] = [
 
 export default function EduSearchPage() {
   const [searchQuery, setSearchQuery] = useState('')
-  const [activeTab, setActiveTab] = useState<'search' | 'sources' | 'crawler'>('search')
+  const [activeTab, setActiveTab] = useState<'search' | 'documents' | 'sources' | 'crawler'>('search')
+  const [documentCount, setDocumentCount] = useState<number>(0)
+
+  const handleDocumentCountChange = useCallback((count: number) => {
+    setDocumentCount(count)
+  }, [])
 
   return (
     <div className="space-y-6">
@@ -95,6 +101,22 @@ export default function EduSearchPage() {
           <Search className="w-4 h-4 inline mr-2" />
           Suche
         </button>
+        <button
+          onClick={() => setActiveTab('documents')}
+          className={`px-4 py-2 rounded-lg font-medium transition-colors ${
+            activeTab === 'documents'
+              ? 'bg-blue-600 text-white'
+              : 'bg-slate-100 text-slate-600 hover:bg-slate-200'
+          }`}
+        >
+          <FolderOpen className="w-4 h-4 inline mr-2" />
+          Dokumente
+          {documentCount > 0 && (
+            <span className="ml-2 px-1.5 py-0.5 bg-white/20 rounded text-xs">
+              {documentCount}
+            </span>
+          )}
+        </button>
         <button
           onClick={() => setActiveTab('sources')}
           className={`px-4 py-2 rounded-lg font-medium transition-colors ${
@@ -162,6 +184,11 @@ export default function EduSearchPage() {
         </div>
       )}
 
+      {/* Documents Tab */}
+      {activeTab === 'documents' && (
+        <DokumenteTab onDocumentCountChange={handleDocumentCountChange} />
+      )}
+
       {/* Sources Tab */}
       {activeTab === 'sources' && (
         <div className="bg-white rounded-xl border border-slate-200 overflow-hidden">
@@ -281,9 +308,9 @@ export default function EduSearchPage() {
             <div className="font-medium text-slate-900">Zeugnisse-Crawler</div>
             <div className="text-sm text-slate-500">Zeugnis-Strukturen verwalten</div>
           </a>
-          <a href="/education/training" className="block p-3 bg-white rounded-lg hover:shadow-md transition-shadow">
-            <div className="font-medium text-slate-900">Training</div>
-            <div className="text-sm text-slate-500">Schulungsmodule verwalten</div>
+          <a href="/ai/rag-pipeline" className="block p-3 bg-white rounded-lg hover:shadow-md transition-shadow">
+            <div className="font-medium text-slate-900">RAG Pipeline</div>
+            <div className="text-sm text-slate-500">Bildungsdokumente indexieren</div>
           </a>
         </div>
       </div>