Repo housekeeping: .gitignore tidy + supabase/.temp + sitemap submission

[AirKyzzZ]

Three small housekeeping items, none blocking.

• .gitignore has been modified in the working tree since at least the 2026-05-22 session (untouched by anyone) — review the diff and either commit or revert.
• supabase/.temp/ appears untracked on every git status (Supabase CLI artifact). Add to .gitignore.
• Search Console sitemap submission — submit https://www.cheatjob.com/sitemap.xml for both cheatjob.com and cheatjob.fr properties so Google reindexes through the 308 redirects (cheatjob.fr/* → www.cheatjob.com/fr/*). Pre-existing from Phase 0, still pending.

Each is a 1-2 minute job.

[AirKyzzZ]

Closed 2 of 3 sub-items in commit 36a188d: removed duplicate .vercel + .env*.local rules (already covered by existing patterns), added supabase/.temp/ ignore. The third sub-item (Search Console sitemap submission) remains — needs your dashboard access.