Convert all server/, test, and setup files from require()/module.exports
to import/export syntax. Activate ESM globally via "type": "module" in
package.json and load dotenv via --import dotenv/config in npm scripts.
Add server/logger.js - zero-dependency, level-based logger that outputs
JSON in production and human-readable format in development. Controlled
via LOG_LEVEL env var (debug/info/warn/error, default: info).
Replaces all 100 console.log/warn/error calls in 14 server files.
- Rate-limit SPA fallback route (missing rate limiting on fs access)
- Add csrfMiddleware to all state-changing auth routes (logout, create
user, change password, delete user) — previously bypassed global CSRF
middleware due to router registration order
- Fix incomplete vCard escaping: escape backslashes before other special
characters to prevent injection via contact fields
- Restrict CI GITHUB_TOKEN to contents: read (least privilege)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Rafael Foster