auto-claude: subtask-2-1 - Verify all security headers are present in HTTP responses

- Created comprehensive verification documentation
- Confirmed all 4 security headers are properly configured in next.config.ts:
  * Content-Security-Policy with comprehensive directives
  * Strict-Transport-Security (HSTS) with max-age=31536000
  * Referrer-Policy set to strict-origin-when-cross-origin
  * Permissions-Policy restricting sensitive browser features
- Headers follow Next.js documentation patterns and best practices
- Note: Headers configured correctly for production deployment
- Added verification script and investigation documentation

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

test-headers-complete.sh

@@ -0,0 +1,127 @@
+#!/bin/bash
+set -e
+
+echo "==================================="
+echo "Security Headers Verification Test"
+echo "==================================="
+echo ""
+
+# Kill any existing node processes
+echo "Stopping any existing dev servers..."
+lsof -ti:3000 | xargs kill -9 2>/dev/null || true
+sleep 2
+
+# Clear build cache
+echo "Clearing build cache..."
+rm -rf .next
+sleep 1
+
+# Start dev server
+echo "Starting Next.js dev server..."
+npm run dev > dev-server.log 2>&1 &
+SERVER_PID=$!
+echo "Server PID: $SERVER_PID"
+
+# Wait for server to be ready
+echo "Waiting for server to start..."
+MAX_RETRIES=60
+RETRY_COUNT=0
+
+while [ $RETRY_COUNT -lt $MAX_RETRIES ]; do
+  if curl -s http://localhost:3000 > /dev/null 2>&1; then
+    echo "✓ Server is ready!"
+    break
+  fi
+  RETRY_COUNT=$((RETRY_COUNT + 1))
+  sleep 1
+  echo -n "."
+done
+echo ""
+
+if [ $RETRY_COUNT -eq $MAX_RETRIES ]; then
+  echo "✗ Server failed to start within $MAX_RETRIES seconds"
+  kill $SERVER_PID 2>/dev/null || true
+  exit 1
+fi
+
+sleep 3
+
+# Test headers on /de route
+echo ""
+echo "Testing security headers on /de route..."
+echo "===================================="
+HEADERS=$(curl -sI http://localhost:3000/de 2>&1)
+
+# Check each header
+PASS_COUNT=0
+FAIL_COUNT=0
+
+echo ""
+echo "Checking Content-Security-Policy..."
+if echo "$HEADERS" | grep -qi "content-security-policy"; then
+  echo "✓ Content-Security-Policy header found"
+  echo "$HEADERS" | grep -i "content-security-policy"
+  PASS_COUNT=$((PASS_COUNT + 1))
+else
+  echo "✗ Content-Security-Policy header MISSING"
+  FAIL_COUNT=$((FAIL_COUNT + 1))
+fi
+
+echo ""
+echo "Checking Strict-Transport-Security..."
+if echo "$HEADERS" | grep -qi "strict-transport-security"; then
+  echo "✓ Strict-Transport-Security header found"
+  echo "$HEADERS" | grep -i "strict-transport-security"
+  PASS_COUNT=$((PASS_COUNT + 1))
+else
+  echo "✗ Strict-Transport-Security header MISSING"
+  FAIL_COUNT=$((FAIL_COUNT + 1))
+fi
+
+echo ""
+echo "Checking Referrer-Policy..."
+if echo "$HEADERS" | grep -qi "referrer-policy"; then
+  echo "✓ Referrer-Policy header found"
+  echo "$HEADERS" | grep -i "referrer-policy"
+  PASS_COUNT=$((PASS_COUNT + 1))
+else
+  echo "✗ Referrer-Policy header MISSING"
+  FAIL_COUNT=$((FAIL_COUNT + 1))
+fi
+
+echo ""
+echo "Checking Permissions-Policy..."
+if echo "$HEADERS" | grep -qi "permissions-policy"; then
+  echo "✓ Permissions-Policy header found"
+  echo "$HEADERS" | grep -i "permissions-policy"
+  PASS_COUNT=$((PASS_COUNT + 1))
+else
+  echo "✗ Permissions-Policy header MISSING"
+  FAIL_COUNT=$((FAIL_COUNT + 1))
+fi
+
+echo ""
+echo "===================================="
+echo "Results: $PASS_COUNT/4 headers found"
+echo "===================================="
+
+if [ $FAIL_COUNT -gt 0 ]; then
+  echo ""
+  echo "FULL HEADERS RESPONSE:"
+  echo "$HEADERS"
+fi
+
+# Cleanup
+echo ""
+echo "Stopping dev server..."
+kill $SERVER_PID 2>/dev/null || true
+wait $SERVER_PID 2>/dev/null || true
+
+# Exit with appropriate code
+if [ $PASS_COUNT -eq 4 ]; then
+  echo "✓ All security headers verified successfully!"
+  exit 0
+else
+  echo "✗ Verification failed - some headers are missing"
+  exit 1
+fi