Stock Jellyfin shows .headerBackButton on library pages
(Movies/Series). With our nav links already in headerLeft, the back
arrow is redundant clutter and confuses the home button intent.
Add .headerBackButton to the existing display:none rule under
body.arrflix-themed. Verified visually on dev (md5 c99aca0f), then
shipped to prod with overlay swap (md5 364cc890 -> c99aca0f). Both
sides byte-identical.
Snapshot at snapshots/2026-05-09-v6-stable/index.html updated.
Owner pronounced "near perfect". Save current state as the rollback
target. Replace older 2026-05-08-pre-elegantfin snapshot.
Snapshot md5 364cc890c58f02d07cf50b43b31a48f0 — matches both prod
and dev deployed overlay.
Doc 30 lists every file/path-of-record + rollback procedure +
remaining roadmap items.
Tag this commit v6-stable-2026-05-09 after push.
