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/promote.sh

@@ -0,0 +1,154 @@
+#!/bin/bash
+# ============================================
+# BreakPilot Code Promotion
+# ============================================
+# Promotes code between environments via Git branches
+#
+# Usage: ./scripts/promote.sh [dev-to-staging|staging-to-prod]
+#
+# Branch Structure:
+#   develop  -> Daily development work
+#   staging  -> Tested and approved code
+#   main     -> Production-ready releases
+# ============================================
+
+set -e
+
+ACTION=$1
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="$(dirname "$SCRIPT_DIR")"
+
+# Colors
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+cd "$ROOT_DIR"
+
+# Check if git repo
+if [ ! -d ".git" ]; then
+    echo -e "${RED}Error: Not a git repository.${NC}"
+    echo "Run: git init"
+    exit 1
+fi
+
+case $ACTION in
+    dev-to-staging)
+        echo -e "${BLUE}========================================${NC}"
+        echo -e "${BLUE}  Promoting: develop -> staging${NC}"
+        echo -e "${BLUE}========================================${NC}"
+        echo ""
+
+        # Ensure working directory is clean
+        if ! git diff-index --quiet HEAD -- 2>/dev/null; then
+            echo -e "${YELLOW}Warning: You have uncommitted changes.${NC}"
+            read -p "Stash changes and continue? (yes/no): " STASH
+            if [ "$STASH" = "yes" ]; then
+                git stash
+                STASHED=true
+            else
+                echo "Aborted. Commit or stash your changes first."
+                exit 1
+            fi
+        fi
+
+        # Update develop
+        echo -e "${YELLOW}Updating develop branch...${NC}"
+        git checkout develop
+        git pull origin develop 2>/dev/null || true
+
+        # Merge to staging
+        echo -e "${YELLOW}Merging into staging...${NC}"
+        git checkout staging
+        git pull origin staging 2>/dev/null || true
+        git merge develop -m "Promote: develop -> staging ($(date +%Y-%m-%d_%H:%M))"
+
+        # Return to develop
+        git checkout develop
+
+        # Restore stash if applicable
+        if [ "$STASHED" = "true" ]; then
+            git stash pop
+        fi
+
+        echo ""
+        echo -e "${GREEN}✓ Merged develop into staging${NC}"
+        echo ""
+        echo "Next steps:"
+        echo "  1. Review changes on staging branch"
+        echo "  2. Test staging environment: ./scripts/start.sh staging"
+        echo "  3. Push when ready: git push origin staging"
+        ;;
+
+    staging-to-prod)
+        echo -e "${RED}========================================${NC}"
+        echo -e "${RED}  WARNING: Promoting to PRODUCTION${NC}"
+        echo -e "${RED}========================================${NC}"
+        echo ""
+
+        read -p "Have tests passed on staging? (yes/no): " TESTED
+        if [ "$TESTED" != "yes" ]; then
+            echo "Please test on staging first."
+            exit 0
+        fi
+
+        read -p "Are you sure you want to promote to production? (yes/no): " CONFIRM
+        if [ "$CONFIRM" != "yes" ]; then
+            echo "Aborted."
+            exit 0
+        fi
+
+        # Update staging
+        echo -e "${YELLOW}Updating staging branch...${NC}"
+        git checkout staging
+        git pull origin staging 2>/dev/null || true
+
+        # Merge to main
+        echo -e "${YELLOW}Merging into main (production)...${NC}"
+        git checkout main
+        git pull origin main 2>/dev/null || true
+        git merge staging -m "Release: staging -> main ($(date +%Y-%m-%d_%H:%M))"
+
+        # Return to develop
+        git checkout develop
+
+        echo ""
+        echo -e "${GREEN}✓ Merged staging into main (production)${NC}"
+        echo ""
+        echo "Next steps:"
+        echo "  1. Review changes on main branch"
+        echo "  2. Push when ready: git push origin main"
+        echo "  3. Create a release tag: git tag -a v1.x.x -m 'Release v1.x.x'"
+        ;;
+
+    status)
+        echo -e "${BLUE}========================================${NC}"
+        echo -e "${BLUE}  Branch Status${NC}"
+        echo -e "${BLUE}========================================${NC}"
+        echo ""
+
+        CURRENT=$(git branch --show-current)
+        echo -e "Current branch: ${GREEN}$CURRENT${NC}"
+        echo ""
+        echo "Branches:"
+        git branch -v
+        echo ""
+        echo "Recent commits:"
+        git log --oneline -5
+        ;;
+
+    *)
+        echo "Usage: $0 [dev-to-staging|staging-to-prod|status]"
+        echo ""
+        echo "Commands:"
+        echo "  dev-to-staging   - Merge develop into staging"
+        echo "  staging-to-prod  - Merge staging into main (production)"
+        echo "  status           - Show branch status"
+        echo ""
+        echo "Branch workflow:"
+        echo "  develop (daily work) -> staging (tested) -> main (production)"
+        exit 1
+        ;;
+esac