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>

studio-v2/.git-hooks/pre-push

@@ -0,0 +1,55 @@
+#!/bin/bash
+#
+# Git pre-push hook for studio-v2
+# Runs Playwright E2E tests before pushing changes
+#
+# To install, run:
+#   chmod +x .git-hooks/pre-push
+#   git config core.hooksPath .git-hooks
+#
+# To skip tests (emergency only):
+#   git push --no-verify
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+echo -e "${YELLOW}Running E2E tests before push...${NC}"
+echo ""
+
+# Navigate to studio-v2 directory
+cd "$(dirname "$0")/../.." || exit 1
+
+# Check if dev server is running on port 3001
+if ! curl -s http://localhost:3001 > /dev/null 2>&1; then
+    echo -e "${YELLOW}Dev server not running. Checking remote...${NC}"
+
+    # Check if macmini server is available
+    if curl -s https://macmini/korrektur > /dev/null 2>&1; then
+        echo -e "${GREEN}Using remote server at https://macmini${NC}"
+        export PLAYWRIGHT_BASE_URL="https://macmini"
+    else
+        echo -e "${RED}No server available. Start dev server with 'npm run dev' or deploy to macmini.${NC}"
+        echo -e "${YELLOW}Skipping tests...${NC}"
+        exit 0
+    fi
+fi
+
+# Run tests
+echo -e "${YELLOW}Running Playwright tests...${NC}"
+npm run test:e2e -- --reporter=list 2>&1
+
+# Check test result
+if [ $? -eq 0 ]; then
+    echo ""
+    echo -e "${GREEN}All tests passed! Pushing...${NC}"
+    exit 0
+else
+    echo ""
+    echo -e "${RED}Tests failed! Push aborted.${NC}"
+    echo -e "${YELLOW}Fix the failing tests and try again.${NC}"
+    echo -e "${YELLOW}To push anyway (not recommended): git push --no-verify${NC}"
+    exit 1
+fi

studio-v2/.git-hooks/setup.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+#
+# Setup git hooks for studio-v2
+#
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+echo "Setting up git hooks for studio-v2..."
+
+# Make hooks executable
+chmod +x "$SCRIPT_DIR/pre-push"
+
+# Configure git to use custom hooks directory
+git config core.hooksPath .git-hooks
+
+echo "Git hooks installed successfully!"
+echo ""
+echo "Hooks enabled:"
+echo "  - pre-push: Runs E2E tests before pushing"
+echo ""
+echo "To disable hooks temporarily: git push --no-verify"