Add a one-off data migration (scripts/fix-group-match-times-utc.mjs) that
shifts group_stage_matches.scheduled_at +7h, converting the pre-fix
local-wall-time-as-UTC (all entered in PDT) into true UTC. Scoped to
group-stage matches only; playoff games were already stored correctly.
Defaults to a dry-run preview and only writes with --apply.
Run: npx dotenv -- node scripts/fix-group-match-times-utc.mjs [--apply]
Fix GroupStageStandings day-header grouping/labels, which keyed and
formatted by UTC date. With times now stored as true UTC, an evening PDT
match rolled into the next UTC day and appeared under the wrong header.
Group and label by the viewer's local date after hydration, keeping the
UTC representation on SSR/first paint for deterministic markup.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0125nZohVD2Cpoq3Q9f4jeds
