Three small post-cutover fixes reported during E2E retest 2026-05-07:
1. js/form-handler.js: disable EmailJS welcome-back call in
showAlreadyRegistered. The EmailJS account is Melissa-only
(no Serge access) and its template still has a '(c) 2025' footer
inconsistent with the Resend emails sent by the new Worker.
The user already sees their existing reference number in the
showAlreadyRegistered modal (= cosmetic email, not critical).
To re-implement properly: route through Worker + Resend in a
future PR.
2. 10 HTML pages: remove duplicate .lang-switcher block from
.mobile-nav. The header already has a lang-switcher visible on
mobile, the second one inside the slide-in mobile menu was redundant.
3. js/main.js: fix IntersectionObserver threshold for animate-on-scroll.
Was threshold: 0.1 — never fires on mobile portrait for cgv.html
and politique-confidentialite.html because those pages have
data-lang-block elements 2000-3000px tall (verbose FR/EN/MG
trilingual content) and viewport (~600px) never reaches 10%
intersection ratio. Now threshold: 0 — fires as soon as any
pixel enters viewport. mentions-legales.html unaffected because
its blocks were short enough to satisfy the previous 10%.
Refs: WordPress \xe2\x86\x92 static migration, post-cutover polish.
