Added proxy configuration to forward /api requests to backend
on localhost:8080 during development.
Benefits:
- Eliminates CORS errors in dev (requests are same-origin)
- No need for CORS_ALLOWED_ORIGINS in dev environment
- Matches production behavior (frontend and API on same domain)
- Simplifies local development setup
Configuration:
- Target: http://localhost:8080
- changeOrigin: true (modifies Host header)
- secure: false (allows self-signed certs in dev)
Impact: Dev environment more stable, no CORS configuration needed.
Fixes: P2.1 from audit AUDIT_TEMP_29_01_2026.md
