- Add Permissions-Policy header disabling camera, microphone,
geolocation, and payment browser features
- Update assertSecurityHeaders test helper to verify the new header
Security: Permissions-Policy restricts browser APIs that this
application does not use, reducing attack surface from content
injection vulnerabilities. No crypto or auth flow changes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>