Final-review fix wave over the web UI branch.
- sessionKey now derives from API_TOKEN and WEB_PASSWORD with a \x00
separator, so rotating the password logs every browser out too.
- uiChapter only clears last_chapter_url when the number actually
changes. The form is pre-filled, so a bare tap of Save resubmits the
same value; that used to destroy the chapter URL silently while
updated_at stayed put, degrading Continue to the series index page.
- MANGA_WEB_HOST is now required by the prod override rather than
falling back to manga.example.com, matching MANGA_API_HOST.
- Comment fixes: static cache rationale, pruneLocked aliasing
invariant, and the stale "3 routes" line in CLAUDE.md.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Adds clientIP() (reads the rightmost X-Forwarded-For hop via
Header.Values, since Traefik appends the peer address it actually
observed and the leftmost entries are client-controlled) and
loginLimiter, an in-memory per-IP counter that blocks after
loginMaxFailures within loginWindow. No routes wire these up yet —
that lands in Task 5.
Adds sessionKey/signSession/verifySession primitives and
setSessionCookie/clearSessionCookie helpers in a new backend/session.go.
Sessions are derived from API_TOKEN via HMAC-SHA256 with domain
separation (sessionKeyPurpose), so there is no session table and
rotating the token invalidates every outstanding cookie at once.
No routes or handlers yet — that's task 5.
sulthan