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>

scripts/mac-mini/backup.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+# Backup vom Mac Mini zum MacBook
+MAC_MINI="benjaminadmin@192.168.178.163"
+BACKUP_DIR="/Users/benjaminadmin/Projekte/breakpilot-pwa-backup-$(date +%Y%m%d)"
+
+echo "📥 Backup vom Mac Mini..."
+mkdir -p "$BACKUP_DIR"
+
+rsync -av --exclude='venv' --exclude='node_modules' --exclude='__pycache__' \
+    ${MAC_MINI}:~/Projekte/breakpilot-pwa/ \
+    "$BACKUP_DIR/"
+
+echo "✅ Backup complete: $BACKUP_DIR"