derekc 59f9685e2b Move JWT from localStorage to HttpOnly cookie; fix CSRF ...

- JWT stored in HttpOnly, Secure, SameSite=Strict cookie — JS cannot
  read the token at all; SameSite=Strict prevents CSRF without tokens
- Non-sensitive user payload returned in response body and stored in
  localStorage for UI purposes only (not usable for auth)
- Add POST /api/auth/logout endpoint that clears the cookie server-side
- Add SECURE_COOKIES env var (default true) for local HTTP testing
- Extract login.html inline script to login.js (CSP compliance)
- Remove Authorization: Bearer header from API calls; add credentials:
  include so cookies are sent automatically
- CSP script-src includes unsafe-inline to support existing onclick
  handlers throughout the app

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-19 23:57:22 -07:00

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