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-security-headers.js

@@ -0,0 +1,165 @@
+const { spawn, execSync } = require('child_process');
+const http = require('http');
+
+console.log('===========================================');
+console.log('Security Headers Verification Script');
+console.log('===========================================\n');
+
+// Kill any process on port 3000
+console.log('Step 1: Stopping any processes on port 3000...');
+try {
+  if (process.platform === 'win32') {
+    execSync('for /f "tokens=5" %a in (\'netstat -aon ^| find ":3000" ^| find "LISTENING"\') do taskkill /F /PID %a', { stdio: 'ignore' });
+  } else {
+    execSync('lsof -ti:3000 | xargs kill -9', { stdio: 'ignore' });
+  }
+  console.log('✓ Stopped existing processes\n');
+} catch (e) {
+  console.log('✓ No processes to stop\n');
+}
+
+// Clear .next directory
+console.log('Step 2: Clearing build cache...');
+try {
+  execSync('rm -rf .next', { stdio: 'inherit' });
+  console.log('✓ Build cache cleared\n');
+} catch (e) {
+  console.log('! Could not clear cache (may not exist)\n');
+}
+
+// Start dev server
+console.log('Step 3: Starting Next.js dev server...');
+const server = spawn('npm', ['run', 'dev'], {
+  stdio: ['ignore', 'pipe', 'pipe'],
+  shell: true,
+  detached: false
+});
+
+let serverReady = false;
+
+server.stdout.on('data', (data) => {
+  const output = data.toString();
+  if (output.includes('Local:') || output.includes('localhost:3000')) {
+    serverReady = true;
+    console.log('✓ Server is ready!\n');
+  }
+});
+
+server.stderr.on('data', (data) => {
+  // Ignore stderr for now
+});
+
+// Wait for server to be ready, then test
+const maxWait = 60000; // 60 seconds
+const startTime = Date.now();
+const interval = setInterval(() => {
+  if (serverReady || (Date.now() - startTime > maxWait)) {
+    clearInterval(interval);
+
+    // Give it a few more seconds to fully initialize
+    setTimeout(() => {
+      testHeaders();
+    }, 5000);
+  }
+}, 1000);
+
+function testHeaders() {
+  console.log('Step 4: Testing security headers...');
+  console.log('=========================================\n');
+
+  const options = {
+    hostname: 'localhost',
+    port: 3000,
+    path: '/de',
+    method: 'HEAD'
+  };
+
+  const req = http.request(options, (res) => {
+    const headers = res.headers;
+
+    let passCount = 0;
+    let failCount = 0;
+
+    // Check Content-Security-Policy
+    console.log('Checking Content-Security-Policy...');
+    if (headers['content-security-policy']) {
+      console.log('✓ Content-Security-Policy found');
+      console.log(`  Value: ${headers['content-security-policy'].substring(0, 60)}...\n`);
+      passCount++;
+    } else {
+      console.log('✗ Content-Security-Policy MISSING\n');
+      failCount++;
+    }
+
+    // Check Strict-Transport-Security
+    console.log('Checking Strict-Transport-Security...');
+    if (headers['strict-transport-security']) {
+      console.log('✓ Strict-Transport-Security found');
+      console.log(`  Value: ${headers['strict-transport-security']}\n`);
+      passCount++;
+    } else {
+      console.log('✗ Strict-Transport-Security MISSING\n');
+      failCount++;
+    }
+
+    // Check Referrer-Policy
+    console.log('Checking Referrer-Policy...');
+    if (headers['referrer-policy']) {
+      console.log('✓ Referrer-Policy found');
+      console.log(`  Value: ${headers['referrer-policy']}\n`);
+      passCount++;
+    } else {
+      console.log('✗ Referrer-Policy MISSING\n');
+      failCount++;
+    }
+
+    // Check Permissions-Policy
+    console.log('Checking Permissions-Policy...');
+    if (headers['permissions-policy']) {
+      console.log('✓ Permissions-Policy found');
+      console.log(`  Value: ${headers['permissions-policy']}\n`);
+      passCount++;
+    } else {
+      console.log('✗ Permissions-Policy MISSING\n');
+      failCount++;
+    }
+
+    console.log('=========================================');
+    console.log(`Results: ${passCount}/4 security headers found`);
+    console.log('=========================================\n');
+
+    if (failCount > 0) {
+      console.log('All response headers:');
+      console.log(headers);
+      console.log('');
+    }
+
+    // Cleanup and exit
+    server.kill('SIGTERM');
+    setTimeout(() => {
+      server.kill('SIGKILL');
+      process.exit(passCount === 4 ? 0 : 1);
+    }, 2000);
+  });
+
+  req.on('error', (error) => {
+    console.error('✗ Error testing headers:', error.message);
+    server.kill('SIGTERM');
+    setTimeout(() => {
+      server.kill('SIGKILL');
+      process.exit(1);
+    }, 2000);
+  });
+
+  req.end();
+}
+
+// Handle script termination
+process.on('SIGINT', () => {
+  console.log('\n\nStopping server...');
+  server.kill('SIGTERM');
+  setTimeout(() => {
+    server.kill('SIGKILL');
+    process.exit(1);
+  }, 2000);
+});