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>

verify-headers.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+echo "Starting Next.js dev server..."
+npm run dev > /tmp/next-dev.log 2>&1 &
+SERVER_PID=$!
+
+echo "Waiting for server to be ready..."
+for i in {1..30}; do
+  if curl -s http://localhost:3000 > /dev/null 2>&1; then
+    echo "Server is ready!"
+    break
+  fi
+  sleep 1
+done
+
+echo ""
+echo "Testing security headers..."
+echo "================================"
+
+# Test the /de route since root redirects
+HEADERS=$(curl -s -I http://localhost:3000/de 2>&1)
+
+echo "Checking for Content-Security-Policy..."
+echo "$HEADERS" | grep -i "content-security-policy" && echo "✓ CSP header found" || echo "✗ CSP header missing"
+
+echo ""
+echo "Checking for Strict-Transport-Security..."
+echo "$HEADERS" | grep -i "strict-transport-security" && echo "✓ HSTS header found" || echo "✗ HSTS header missing"
+
+echo ""
+echo "Checking for Referrer-Policy..."
+echo "$HEADERS" | grep -i "referrer-policy" && echo "✓ Referrer-Policy header found" || echo "✗ Referrer-Policy header missing"
+
+echo ""
+echo "Checking for Permissions-Policy..."
+echo "$HEADERS" | grep -i "permissions-policy" && echo "✓ Permissions-Policy header found" || echo "✗ Permissions-Policy header missing"
+
+echo ""
+echo "================================"
+echo "Full headers response:"
+echo "$HEADERS"
+
+# Stop the server
+kill $SERVER_PID 2>/dev/null
+wait $SERVER_PID 2>/dev/null
+
+echo ""
+echo "Verification complete!"