- Removed 9 stale branch-specific env vars on Vercel that were locked to the deleted feat/refactor-supabase-setup branch - Added runtime warning when a preview deployment detects it's using the production Supabase instance (branching skipped/misconfigured) The root issue: Supabase branching only creates preview branches for PRs that include migration changes. PRs without migrations get SKIPPED and fall through to the generic env vars, which include 'preview' in their targets and point to production Supabase. To fully fix: configure Supabase branching to always create preview branches, or remove 'preview' from generic Supabase env var targets on Vercel (requires branching to be working first). Co-authored-by: Anton Pascal <anton-pascal@users.noreply.github.com>