fix: scroll to hash anchor after Apollo data loads on tournament page

The browser fires native hash-scroll before useQuery resolves, so the
target element doesn't exist yet. A useEffect keyed on data re-scrolls
once the matches are in the DOM.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/tournaments/[year]/page.tsx

@@ -1,6 +1,6 @@
 'use client'
 import { useQuery, gql } from '@/lib/graphql/hooks'
-import { use } from 'react'
+import { use, useEffect } from 'react'
 import Link from 'next/link'
 import { TeamFlag } from '@/components/team-flag'
 import { MatchCard } from '@/components/match-card'
@@ -64,6 +64,14 @@ export default function TournamentPage({ params }: { params: Promise<{ year: str
   const year = parseInt(yearStr)
   const { data, loading } = useQuery(TOURNAMENT_QUERY, { variables: { year }, pollInterval: year === 2026 ? 60_000 : 0 })
 
+  useEffect(() => {
+    if (!data) return
+    const hash = window.location.hash
+    if (!hash) return
+    const el = document.getElementById(hash.slice(1))
+    if (el) el.scrollIntoView({ behavior: 'smooth', block: 'center' })
+  }, [data])
+
   const t = data?.tournament
   const standings: Standing[] = data?.groupStandings ?? []
   const byGroup = standings.reduce<Record<string, Standing[]>>((acc, s) => {