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)/ai/rag/page.tsx

@@ -10,6 +10,7 @@
 import React, { useState, useEffect, useCallback } from 'react'
 import Link from 'next/link'
 import { PagePurpose } from '@/components/common/PagePurpose'
+import { AIModuleSidebarResponsive } from '@/components/ai/AIModuleSidebar'
 
 // API uses local proxy route to klausur-service
 const API_PROXY = '/api/legal-corpus'
@@ -1021,20 +1022,25 @@ export default function RAGPage() {
       <div className="p-6">
         {/* Page Purpose */}
         <PagePurpose
-          title="Legal Corpus RAG"
-          purpose="Das Legal Corpus RAG System indexiert alle 19 relevanten Regulierungen (DSGVO, AI Act, CRA, BSI TR-03161, etc.) fuer semantische Suche waehrend UCCA-Assessments. Die Dokumente werden in Chunks aufgeteilt und mit BGE-M3 Embeddings indexiert."
+          title="Daten & RAG"
+          purpose="Verwalten und durchsuchen Sie indexierte Dokumente im RAG-System. Das Legal Corpus enthält 19+ Regulierungen (DSGVO, AI Act, CRA, BSI TR-03161, etc.) für semantische Suche. Teil der KI-Daten-Pipeline: Empfängt Embeddings von der RAG Pipeline und liefert Suchergebnisse an die Klausur-Korrektur."
           audience={['DSB', 'Compliance Officer', 'Entwickler']}
           gdprArticles={['§5 UrhG (Amtliche Werke)', 'Art. 5 DSGVO (Rechenschaftspflicht)']}
           architecture={{
             services: ['klausur-service (Python)', 'embedding-service (BGE-M3)', 'Qdrant (Vector DB)'],
-            databases: ['Qdrant Collection: bp_legal_corpus'],
+            databases: ['Qdrant Collections: bp_legal_corpus, bp_nibis_eh, bp_eh'],
           }}
           relatedPages={[
+            { name: 'RAG Pipeline', href: '/ai/rag-pipeline', description: 'Neue Dokumente indexieren' },
+            { name: 'Klausur-Korrektur', href: '/ai/klausur-korrektur', description: 'RAG-Suche nutzen' },
+            { name: 'OCR-Labeling', href: '/ai/ocr-labeling', description: 'Ground Truth erstellen' },
             { name: 'Compliance Hub', href: '/compliance/hub', description: 'Compliance-Dashboard' },
-            { name: 'Requirements', href: '/compliance/requirements', description: 'Anforderungskatalog' },
           ]}
         />
 
+        {/* AI Module Sidebar - Desktop: Fixed, Mobile: FAB + Drawer */}
+        <AIModuleSidebarResponsive currentModule="rag" />
+
         {/* Stats Cards */}
         <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-6">
           <div className="bg-white rounded-xl p-4 border border-slate-200">